Java by API/javax.swing/JList

Содержание

1 extends JList (custom tooltops)
2 JList: addListSelectionListener(ListSelectionListener listener)
3 JList: addMouseListener(MouseListener lis)
4 JList: addSelectionInterval(int anchor, int lead)
5 JList: clearSelection()
6 JList: getFirstVisibleIndex()
7 JList: getLastVisibleIndex()
8 JList: getLayoutOrientation()
9 JList: getMaxSelectionIndex()
10 JList: getNextMatch(String prefix, int startIndex, Bias bias)
11 JList: getSelectedIndices()
12 JList: getSelectedValues()
13 JList.getSelectionBackground()
14 JList: getSelectionForeground()
15 JList: getVisibleRowCount()
16 JList: isSelectedIndex(int index)
17 JList: isSelectionEmpty()
18 JList: locationToIndex(Point p)
19 JList: removeSelectionInterval(int index0, int index1)
20 JList: setCellRenderer(ListCellRenderer cellRenderer)
21 JList: setDragEnabled(boolean b)
22 JList: setFixedCellHeight(int height)
23 JList: setFixedCellWidth(int width)
24 JList: setLayoutOrientation(int ori)
25 JList: setModel(ListModel model)
26 JList: setPrototypeCellValue(Object prototypeCellValue)
27 JList: setSelectedIndex(int index)
28 JList: setSelectedValue(Object anObject, boolean shouldScroll)
29 JList: setSelectionInterval(int anchor, int lead)
30 JList: setSelectionMode(int selectionMode)
31 JList: setVisibleRowCount(int count)
32 JList.VERTICAL_WRAP
33 new JList(ListModel dataModel) (Share model with JComboBox)
34 new JList(Object[] listData)
35 new JList(Vector<?> listData)
36 new JScrollPane(JList list)

extends JList (custom tooltops)

   <source lang="java">

import java.awt.EventQueue; import java.awt.Point; import java.awt.event.MouseEvent; import java.util.Arrays; import java.util.Collection; import java.util.Enumeration; import java.util.Iterator; import java.util.Properties; import java.util.SortedSet; import java.util.TreeSet; import javax.swing.AbstractListModel; import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JScrollPane; import javax.swing.ToolTipManager; public class MainClass extends JList {

 SortedListModel model;
 Properties tipProps;
 public MainClass(Properties props) {
   model = new SortedListModel();
   setModel(model);
   ToolTipManager.sharedInstance().registerComponent(this);
   tipProps = props;
   addProperties(props);
 }
 private void addProperties(Properties props) {
   Enumeration names = props.propertyNames();
   while (names.hasMoreElements()) {
     model.add(names.nextElement());
   }
 }
 public String getToolTipText(MouseEvent event) {
   Point p = event.getPoint();
   int location = locationToIndex(p);
   String key = (String) model.getElementAt(location);
   String tip = tipProps.getProperty(key);
   return tip;
 }
 public static void main(String args[]) {
   JFrame frame = new JFrame("Custom Tip Demo");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   Properties props = System.getProperties();
   MainClass list = new MainClass(props);
   JScrollPane scrollPane = new JScrollPane(list);
   frame.add(scrollPane);
   frame.setSize(300, 300);
   frame.setVisible(true);
 }

} class SortedListModel extends AbstractListModel {

 SortedSet<Object> model;
 public SortedListModel() {
   model = new TreeSet<Object>();
 }
 public int getSize() {
   return model.size();
 }
 public Object getElementAt(int index) {
   return model.toArray()[index];
 }
 public void add(Object element) {
   if (model.add(element)) {
     fireContentsChanged(this, 0, getSize());
   }
 }
 public void addAll(Object elements[]) {
   Collection<Object> c = Arrays.asList(elements);
   model.addAll(c);
   fireContentsChanged(this, 0, getSize());
 }
 public void clear() {
   model.clear();
   fireContentsChanged(this, 0, getSize());
 }
 public boolean contains(Object element) {
   return model.contains(element);
 }
 public Object firstElement() {
   return model.first();
 }
 public Iterator iterator() {
   return model.iterator();
 }
 public Object lastElement() {
   return model.last();
 }
 public boolean removeElement(Object element) {
   boolean removed = model.remove(element);
   if (removed) {
     fireContentsChanged(this, 0, getSize());
   }
   return removed;
 }

}

 </source>

JList: addListSelectionListener(ListSelectionListener listener)

   <source lang="java">

/*

java.util.ArrayList: 
java.util.ArrayList: Collection 
java.util.ArrayList: int 

*/

import java.awt.BorderLayout; import java.awt.Container; import java.awt.FlowLayout; import java.util.ArrayList; import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JScrollPane; import javax.swing.event.ListSelectionEvent; import javax.swing.event.ListSelectionListener; public class MainClass extends JFrame {

 JList list = null;
 MainClass() {
   Container cp = getContentPane();
   cp.setLayout(new FlowLayout());
   ArrayList data = new ArrayList();
   data.add("Hi");
   data.add("Hello");
   data.add("Goodbye");
    list = new JList(data.toArray());
   list.addListSelectionListener(new ListSelectionListener() {
     public void valueChanged(ListSelectionEvent evt) {
       if (evt.getValueIsAdjusting())
         return;
       System.out.println("Selected from " + evt.getFirstIndex() + " to " + evt.getLastIndex());
     }
   });
   cp.add(new JScrollPane(list), BorderLayout.CENTER);
 }
 public static void main(String[] s) {
   MainClass l = new MainClass();
   l.pack();
   l.setVisible(true);
 }

}

 </source>

JList: addMouseListener(MouseListener lis)

   <source lang="java">

import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JScrollPane; public class MainClass {

 public static void main(final String args[]) {
   final String labels[] = { "A", "B", "C", "D", "E" };
   JFrame frame = new JFrame("Selecting JList");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JList jlist = new JList(labels);
   JScrollPane scrollPane1 = new JScrollPane(jlist);
   frame.add(scrollPane1);
   MouseListener mouseListener = new MouseAdapter() {
     public void mouseClicked(MouseEvent mouseEvent) {
       JList theList = (JList) mouseEvent.getSource();
       if (mouseEvent.getClickCount() == 2) {
         int index = theList.locationToIndex(mouseEvent.getPoint());
         if (index >= 0) {
           Object o = theList.getModel().getElementAt(index);
           System.out.println("Double-clicked on: " + o.toString());
         }
       }
     }
   };
   jlist.addMouseListener(mouseListener);
   frame.setSize(350, 200);
   frame.setVisible(true);
 }

}

 </source>

JList: addSelectionInterval(int anchor, int lead)

   <source lang="java">

import javax.swing.JList; public class Main {

 public static void main(String[] argv) throws Exception {
   String[] items = { "A", "B", "C", "D" };
   JList list = new JList(items);
   int start = 2;
   int end = 2;
   list.addSelectionInterval(start, end); 
 }

}

 </source>

JList: clearSelection()

   <source lang="java">

import javax.swing.JList; public class Main {

 public static void main(String[] argv) throws Exception {
   String[] items = { "A", "B", "C", "D" };
   JList list = new JList(items);
   list.clearSelection();
 }

}

 </source>

JList: getFirstVisibleIndex()

   <source lang="java">

import javax.swing.JList; public class Main {

 public static void main(String[] argv) throws Exception {
   String[] items = { "A", "B", "C", "D" };
   JList list = new JList(items);
   int itemIx = list.getFirstVisibleIndex();
   if (itemIx < 0) {
     // List is either not visible or there are no items
   }
 }

}

 </source>

JList: getLastVisibleIndex()

   <source lang="java">

import javax.swing.JList; public class Main {

 public static void main(String[] argv) throws Exception {
   String[] items = { "A", "B", "C", "D" };
   JList list = new JList(items);
   int itemIx = list.getLastVisibleIndex();
 }

}

 </source>

JList: getLayoutOrientation()

   <source lang="java">

import javax.swing.JList; import javax.swing.JScrollPane; public class Main {

 public static void main(String[] argv) throws Exception {
   String[] items = { "A", "B", "C", "D" };
   JList list = new JList(items);
   JScrollPane scrollingList = new JScrollPane(list);
   // The default layout orientation is JList.VERTICAL
   int orient = list.getLayoutOrientation();
   // Change the layout orientation to left-to-right, top-to-bottom
   list.setLayoutOrientation(JList.HORIZONTAL_WRAP);
 }

}

 </source>

JList: getMaxSelectionIndex()

   <source lang="java">

import javax.swing.JList; public class Main {

 public static void main(String[] argv) throws Exception {
   String[] items = { "A", "B", "C", "D" };
   JList list = new JList(items);
   int lastSelIx = list.getMaxSelectionIndex();
 }

}

 </source>

JList: getNextMatch(String prefix, int startIndex, Bias bias)

   <source lang="java">

import javax.swing.JList; public class Main {

 public static void main(String[] argv) throws Exception {
   String[] items = { "A", "B", "C", "D" };
   JList list = new JList(items);
   String prefix = "b";
   int start = 0;
   
   int itemIx = list.getNextMatch(prefix, start, javax.swing.text.Position.Bias.Forward);
 }

}

 </source>

JList: getSelectedIndices()

   <source lang="java">

import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JScrollPane; import javax.swing.event.ListSelectionEvent; import javax.swing.event.ListSelectionListener; public class MainClass {

 public static void main(final String args[]) {
   final String labels[] = { "A", "B", "C", "D", "E" };
   JFrame frame = new JFrame("Selecting JList");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JList jlist = new JList(labels);
   JScrollPane scrollPane1 = new JScrollPane(jlist);
   frame.add(scrollPane1);
   ListSelectionListener listSelectionListener = new ListSelectionListener() {
     public void valueChanged(ListSelectionEvent listSelectionEvent) {
       System.out.println("First index: " + listSelectionEvent.getFirstIndex());
       System.out.println(", Last index: " + listSelectionEvent.getLastIndex());
       boolean adjust = listSelectionEvent.getValueIsAdjusting();
       System.out.println(", Adjusting? " + adjust);
       if (!adjust) {
         JList list = (JList) listSelectionEvent.getSource();
         int selections[] = list.getSelectedIndices();
         Object selectedValues[] = list.getSelectedValues();
         for (int i = 0, n = selections.length; i < n; i++) {
           if (i == 0) {
             System.out.println("  Selections: ");
           }
           System.out.println(selections[i] + "/" + selectedValues[i] + " ");
         }
       }
     }
   };
   jlist.addListSelectionListener(listSelectionListener);
   frame.setSize(350, 200);
   frame.setVisible(true);
 }

}

 </source>

JList: getSelectedValues()

   <source lang="java">

import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JScrollPane; import javax.swing.event.ListSelectionEvent; import javax.swing.event.ListSelectionListener; public class MainClass {

 public static void main(final String args[]) {
   final String labels[] = { "A", "B", "C", "D", "E" };
   JFrame frame = new JFrame("Selecting JList");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JList jlist = new JList(labels);
   JScrollPane scrollPane1 = new JScrollPane(jlist);
   frame.add(scrollPane1);
   ListSelectionListener listSelectionListener = new ListSelectionListener() {
     public void valueChanged(ListSelectionEvent listSelectionEvent) {
       System.out.println("First index: " + listSelectionEvent.getFirstIndex());
       System.out.println(", Last index: " + listSelectionEvent.getLastIndex());
       boolean adjust = listSelectionEvent.getValueIsAdjusting();
       System.out.println(", Adjusting? " + adjust);
       if (!adjust) {
         JList list = (JList) listSelectionEvent.getSource();
         int selections[] = list.getSelectedIndices();
         Object selectedValues[] = list.getSelectedValues();
         for (int i = 0, n = selections.length; i < n; i++) {
           if (i == 0) {
             System.out.println("  Selections: ");
           }
           System.out.println(selections[i] + "/" + selectedValues[i] + " ");
         }
       }
     }
   };
   jlist.addListSelectionListener(listSelectionListener);
   frame.setSize(350, 200);
   frame.setVisible(true);
 }

}

 </source>

JList.getSelectionBackground()

   <source lang="java">

// import java.awt.ruponent; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JList; import javax.swing.JScrollPane; import javax.swing.ListCellRenderer; import javax.swing.ListModel; import javax.swing.event.ListDataListener; public class MainClass extends JFrame {

 MainClass(String s) {
   super(s);
   ListModel lm = new StaticListModel();
   JList list = new JList();
   list.setModel(lm);
   list.setCellRenderer(new MyCellRenderer());
   getContentPane().add(new JScrollPane(list));
   setDefaultCloseOperation(EXIT_ON_CLOSE);
 }
 public static void main(String[] s) {
   MainClass l = new MainClass("ListModel");
   l.pack();
   l.setVisible(true);
 }
 class MyCellRenderer extends JLabel implements ListCellRenderer {
   public Component getListCellRendererComponent(JList list, Object value, int index,
       boolean isSelected, boolean cellHasFocus) {
     Component c = null;
     if (value == null) {
       c = new JLabel("(null)");
     } else if (value instanceof Component) {
       c = (Component) value;
     } else {
       c = new JLabel(value.toString());
     }
     if (isSelected) {
       c.setBackground(list.getSelectionBackground());
       c.setForeground(list.getSelectionForeground());
     } else {
       c.setBackground(list.getBackground());
       c.setForeground(list.getForeground());
     }
     if (c instanceof JComponent) {
       ((JComponent) c).setOpaque(true);
     }
     return c;
   }
 }
 class StaticListModel implements ListModel {
   private final Object[] data = { "Hello", new Object(), new java.util.Date(),
       new JLabel("Hello world!"), this, };
   public Object getElementAt(int index) {
     return data[index];
   }
   public int getSize() {
     return data.length;
   }
   public void addListDataListener(ListDataListener ldl) {
   }
   public void removeListDataListener(ListDataListener ldl) {
   }
 }

}

 </source>

JList: getSelectionForeground()

   <source lang="java">

// import java.awt.ruponent; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JList; import javax.swing.JScrollPane; import javax.swing.ListCellRenderer; import javax.swing.ListModel; import javax.swing.event.ListDataListener; public class MainClass extends JFrame {

 MainClass(String s) {
   super(s);
   ListModel lm = new StaticListModel();
   JList list = new JList();
   list.setModel(lm);
   list.setCellRenderer(new MyCellRenderer());
   getContentPane().add(new JScrollPane(list));
   setDefaultCloseOperation(EXIT_ON_CLOSE);
 }
 public static void main(String[] s) {
   MainClass l = new MainClass("ListModel");
   l.pack();
   l.setVisible(true);
 }
 class MyCellRenderer extends JLabel implements ListCellRenderer {
   public Component getListCellRendererComponent(JList list, Object value, int index,
       boolean isSelected, boolean cellHasFocus) {
     Component c = null;
     if (value == null) {
       c = new JLabel("(null)");
     } else if (value instanceof Component) {
       c = (Component) value;
     } else {
       c = new JLabel(value.toString());
     }
     if (isSelected) {
       c.setBackground(list.getSelectionBackground());
       c.setForeground(list.getSelectionForeground());
     } else {
       c.setBackground(list.getBackground());
       c.setForeground(list.getForeground());
     }
     if (c instanceof JComponent) {
       ((JComponent) c).setOpaque(true);
     }
     return c;
   }
 }
 class StaticListModel implements ListModel {
   private final Object[] data = { "Hello", new Object(), new java.util.Date(),
       new JLabel("Hello world!"), this, };
   public Object getElementAt(int index) {
     return data[index];
   }
   public int getSize() {
     return data.length;
   }
   public void addListDataListener(ListDataListener ldl) {
   }
   public void removeListDataListener(ListDataListener ldl) {
   }
 }

}

 </source>

JList: getVisibleRowCount()

   <source lang="java">

import javax.swing.JList; public class Main {

 public static void main(String[] argv) throws Exception {
   String[] items = { "A", "B", "C", "D" };
   JList list = new JList(items);
   // Get number of visible items
   int visibleSize = list.getVisibleRowCount();
 }

}

 </source>

JList: isSelectedIndex(int index)

   <source lang="java">

import javax.swing.JList; public class Main {

 public static void main(String[] argv) throws Exception {
   String[] items = { "A", "B", "C", "D" };
   JList list = new JList(items);
   int index = 2;
   boolean isSel = list.isSelectedIndex(index);
 }

}

 </source>

JList: isSelectionEmpty()

   <source lang="java">

import javax.swing.JList; public class Main {

 public static void main(String[] argv) throws Exception {
   String[] items = { "A", "B", "C", "D" };
   JList list = new JList(items);
   boolean anySelected = !list.isSelectionEmpty();
 }

}

 </source>

JList: locationToIndex(Point p)

   <source lang="java">

import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JScrollPane; public class MainClass {

 public static void main(final String args[]) {
   final String labels[] = { "A", "B", "C", "D", "E" };
   JFrame frame = new JFrame("Selecting JList");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JList jlist = new JList(labels);
   JScrollPane scrollPane1 = new JScrollPane(jlist);
   frame.add(scrollPane1);
   MouseListener mouseListener = new MouseAdapter() {
     public void mouseClicked(MouseEvent mouseEvent) {
       JList theList = (JList) mouseEvent.getSource();
       if (mouseEvent.getClickCount() == 2) {
         int index = theList.locationToIndex(mouseEvent.getPoint());
         if (index >= 0) {
           Object o = theList.getModel().getElementAt(index);
           System.out.println("Double-clicked on: " + o.toString());
         }
       }
     }
   };
   jlist.addMouseListener(mouseListener);
   frame.setSize(350, 200);
   frame.setVisible(true);
 }

}

 </source>

JList: removeSelectionInterval(int index0, int index1)

   <source lang="java">

import javax.swing.JList; public class Main {

 public static void main(String[] argv) throws Exception {
   String[] items = { "A", "B", "C", "D" };
   JList list = new JList(items);
   int start = 0;
   int end = 0;
   list.removeSelectionInterval(start, end);
 }

}

 </source>

JList: setCellRenderer(ListCellRenderer cellRenderer)

   <source lang="java">

import java.awt.BorderLayout; import java.awt.Color; import java.awt.ruponent; import java.awt.Font; import javax.swing.DefaultListCellRenderer; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JList; import javax.swing.JScrollPane; import javax.swing.ListCellRenderer; public class MainClass {

 public static void main(String args[]) throws Exception {
   Object elements[][] = { { new Font("Courier", Font.BOLD, 16), Color.YELLOW, "This" },
       { new Font("Helvetica", Font.ITALIC, 8), Color.DARK_GRAY, "Computer" } };
   JFrame frame = new JFrame("Complex Renderer");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JList jlist = new JList(elements);
   ListCellRenderer renderer = new ComplexCellRenderer();
   jlist.setCellRenderer(renderer);
   JScrollPane scrollPane = new JScrollPane(jlist);
   frame.add(scrollPane, BorderLayout.CENTER);
   frame.setSize(300, 200);
   frame.setVisible(true);
 }

} class ComplexCellRenderer implements ListCellRenderer {

 protected DefaultListCellRenderer defaultRenderer = new DefaultListCellRenderer();
 public Component getListCellRendererComponent(JList list, Object value, int index,
     boolean isSelected, boolean cellHasFocus) {
   Font theFont = null;
   Color theForeground = null;
   String theText = null;
   JLabel renderer = (JLabel) defaultRenderer.getListCellRendererComponent(list, value, index,
       isSelected, cellHasFocus);
   if (value instanceof Object[]) {
     Object values[] = (Object[]) value;
     theFont = (Font) values[0];
     theForeground = (Color) values[1];
     theText = (String) values[2];
   } else {
     theFont = list.getFont();
     theForeground = list.getForeground();
     theText = "";
   }
   if (!isSelected) {
     renderer.setForeground(theForeground);
   }
   renderer.setText(theText);
   renderer.setFont(theFont);
   return renderer;
 }

}

 </source>

JList: setDragEnabled(boolean b)

   <source lang="java">

import java.awt.BorderLayout; import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JScrollPane; import javax.swing.ListSelectionModel; public class DragTest14 extends JFrame {

 JList jl;
 String[] items = { "Java", "C", "C++", "Lisp", "Perl", "Python" };
 public DragTest14() {
   super("Drag Test 1.4");
   setSize(200, 150);
   setDefaultCloseOperation(EXIT_ON_CLOSE);
   jl = new JList(items);
   jl.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
   jl.setDragEnabled(true);
   getContentPane().add(new JScrollPane(jl), BorderLayout.CENTER);
   setVisible(true);
 }
 public static void main(String args[]) {
   new DragTest14();
 }

}

 </source>

JList: setFixedCellHeight(int height)

   <source lang="java">

import java.awt.BorderLayout; import javax.swing.DefaultListModel; import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JScrollPane; public class MainClass {

 public static void main(final String args[]) {
   String labels[] = { "A", "B", "C", "D", "E" };
   JFrame frame = new JFrame("Sizing Samples");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   DefaultListModel model = new DefaultListModel();
   model.ensureCapacity(1000);
   for (int i = 0; i < 100; i++) {
     for (int j = 0; j < 5; j++) {
       model.addElement(labels[j]);
     }
   }
   JList jlist2 = new JList(model);
   jlist2.setVisibleRowCount(4);
   jlist2.setFixedCellHeight(12);
   jlist2.setFixedCellWidth(200);
   JScrollPane scrollPane2 = new JScrollPane(jlist2);
   frame.add(scrollPane2, BorderLayout.CENTER);
   frame.setSize(300, 350);
   frame.setVisible(true);
 }

}

 </source>

JList: setFixedCellWidth(int width)

   <source lang="java">

import javax.swing.JList; public class Main {

 public static void main(String[] argv) throws Exception {
   String[] items = { "A", "B", "C", "D" };
   JList list = new JList(items);
   // Set the item width
   int cellWidth = 200;
   list.setFixedCellWidth(cellWidth);
   // Set the item height
   int cellHeight = 18;
   list.setFixedCellHeight(cellHeight);
 }

}

 </source>

JList: setLayoutOrientation(int ori)

   <source lang="java">

import java.awt.BorderLayout; import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JScrollPane; public class MainClass {

 public static void main(final String args[]) {
   final String labels[] = { "A", "B", "C", "D", "E" };
   JFrame frame = new JFrame("Multi-Columns");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JList columns = new JList(labels);
   columns.setLayoutOrientation(JList.HORIZONTAL_WRAP);
   columns.setVisibleRowCount(3);
   JScrollPane sp = new JScrollPane(columns);
   frame.add(sp, BorderLayout.CENTER);
   frame.setSize(300, 200);
   frame.setVisible(true);
 }

}

 </source>

JList: setModel(ListModel model)

   <source lang="java">

// import java.awt.ruponent; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JList; import javax.swing.JScrollPane; import javax.swing.ListCellRenderer; import javax.swing.ListModel; import javax.swing.event.ListDataListener; public class MainClass extends JFrame {

 MainClass(String s) {
   super(s);
   ListModel lm = new StaticListModel();
   JList list = new JList();
   list.setModel(lm);
   list.setCellRenderer(new MyCellRenderer());
   getContentPane().add(new JScrollPane(list));
   setDefaultCloseOperation(EXIT_ON_CLOSE);
 }
 public static void main(String[] s) {
   MainClass l = new MainClass("ListModel");
   l.pack();
   l.setVisible(true);
 }
 class MyCellRenderer extends JLabel implements ListCellRenderer {
   public Component getListCellRendererComponent(JList list, Object value, int index,
       boolean isSelected, boolean cellHasFocus) {
     Component c = null;
     if (value == null) {
       c = new JLabel("(null)");
     } else if (value instanceof Component) {
       c = (Component) value;
     } else {
       c = new JLabel(value.toString());
     }
     if (isSelected) {
       c.setBackground(list.getSelectionBackground());
       c.setForeground(list.getSelectionForeground());
     } else {
       c.setBackground(list.getBackground());
       c.setForeground(list.getForeground());
     }
     if (c instanceof JComponent) {
       ((JComponent) c).setOpaque(true);
     }
     return c;
   }
 }
 class StaticListModel implements ListModel {
   private final Object[] data = { "Hello", new Object(), new java.util.Date(),
       new JLabel("Hello world!"), this, };
   public Object getElementAt(int index) {
     return data[index];
   }
   public int getSize() {
     return data.length;
   }
   public void addListDataListener(ListDataListener ldl) {
   }
   public void removeListDataListener(ListDataListener ldl) {
   }
 }

}

 </source>

JList: setPrototypeCellValue(Object prototypeCellValue)

   <source lang="java">

import javax.swing.JList; public class Main {

 public static void main(String[] argv) throws Exception {
   String[] items = { "A", "B", "C", "D" };
   JList list = new JList(items);
   String protoCellValue = "My Sample Item Value";
   list.setPrototypeCellValue(protoCellValue);
 }

}

 </source>

JList: setSelectedIndex(int index)

   <source lang="java">

/*

* Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
*   - Redistributions of source code must retain the above copyright
*     notice, this list of conditions and the following disclaimer.
*
*   - Redistributions in binary form must reproduce the above copyright
*     notice, this list of conditions and the following disclaimer in the
*     documentation and/or other materials provided with the distribution.
*
*   - Neither the name of Sun Microsystems nor the names of its
*     contributors may be used to endorse or promote products derived
*     from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/*

* ListDataEventDemo.java requires the Java Look and Feel Graphics
* Repository (jlfgr-1_0.jar).  You can download this file from
* http://java.sun.ru/developer/techDocs/hi/repository/
* Put it in the class path using one of the following commands
* (assuming jlfgr-1_0.jar is in a subdirectory named jars):
*
*   java -cp .;jars/jlfgr-1_0.jar ListDataEventDemo [Microsoft Windows]
*   java -cp .:jars/jlfgr-1_0.jar ListDataEventDemo [UNIX]
*/

import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.GridLayout; import java.awt.Insets; import java.awt.Toolkit; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.DefaultListModel; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JSplitPane; import javax.swing.JTextArea; import javax.swing.JTextField; import javax.swing.ListSelectionModel; import javax.swing.event.ListDataEvent; import javax.swing.event.ListDataListener; import javax.swing.event.ListSelectionEvent; import javax.swing.event.ListSelectionListener; public class Main extends JPanel implements ListSelectionListener {

 private JList list;
 private DefaultListModel listModel;
 private static final String addString = "Add";
 private static final String deleteString = "Delete";
 private static final String upString = "Move up";
 private static final String downString = "Move down";
 private JButton addButton;
 private JButton deleteButton;
 private JButton upButton;
 private JButton downButton;
 private JTextField nameField;
 private JTextArea log;
 static private String newline = "\n";
 public Main() {
   super(new BorderLayout());
   // Create and populate the list model.
   listModel = new DefaultListModel();
   listModel.addElement("Whistler, Canada");
   listModel.addElement("Jackson Hole, Wyoming");
   listModel.addElement("Squaw Valley, California");
   listModel.addElement("Telluride, Colorado");
   listModel.addElement("Taos, New Mexico");
   listModel.addElement("Snowbird, Utah");
   listModel.addElement("Chamonix, France");
   listModel.addElement("Banff, Canada");
   listModel.addElement("Arapahoe Basin, Colorado");
   listModel.addElement("Kirkwood, California");
   listModel.addElement("Sun Valley, Idaho");
   listModel.addListDataListener(new MyListDataListener());
   // Create the list and put it in a scroll pane.
   list = new JList(listModel);
   list.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
   list.setSelectedIndex(0);
   list.addListSelectionListener(this);
   JScrollPane listScrollPane = new JScrollPane(list);
   // Create the list-modifying buttons.
   addButton = new JButton(addString);
   addButton.setActionCommand(addString);
   addButton.addActionListener(new AddButtonListener());
   deleteButton = new JButton(deleteString);
   deleteButton.setActionCommand(deleteString);
   deleteButton.addActionListener(new DeleteButtonListener());
   ImageIcon icon = createImageIcon("Up16");
   if (icon != null) {
     upButton = new JButton(icon);
     upButton.setMargin(new Insets(0, 0, 0, 0));
   } else {
     upButton = new JButton("Move up");
   }
   upButton.setToolTipText("Move the currently selected list item higher.");
   upButton.setActionCommand(upString);
   upButton.addActionListener(new UpDownListener());
   icon = createImageIcon("Down16");
   if (icon != null) {
     downButton = new JButton(icon);
     downButton.setMargin(new Insets(0, 0, 0, 0));
   } else {
     downButton = new JButton("Move down");
   }
   downButton.setToolTipText("Move the currently selected list item lower.");
   downButton.setActionCommand(downString);
   downButton.addActionListener(new UpDownListener());
   JPanel upDownPanel = new JPanel(new GridLayout(2, 1));
   upDownPanel.add(upButton);
   upDownPanel.add(downButton);
   // Create the text field for entering new names.
   nameField = new JTextField(15);
   nameField.addActionListener(new AddButtonListener());
   String name = listModel.getElementAt(list.getSelectedIndex()).toString();
   nameField.setText(name);
   // Create a control panel, using the default FlowLayout.
   JPanel buttonPane = new JPanel();
   buttonPane.add(nameField);
   buttonPane.add(addButton);
   buttonPane.add(deleteButton);
   buttonPane.add(upDownPanel);
   // Create the log for reporting list data events.
   log = new JTextArea(10, 20);
   JScrollPane logScrollPane = new JScrollPane(log);
   // Create a split pane for the log and the list.
   JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT,
       listScrollPane, logScrollPane);
   splitPane.setResizeWeight(0.5);
   // Put everything together.
   add(buttonPane, BorderLayout.PAGE_START);
   add(splitPane, BorderLayout.CENTER);
 }
 class MyListDataListener implements ListDataListener {
   public void contentsChanged(ListDataEvent e) {
     log.append("contentsChanged: " + e.getIndex0() + ", " + e.getIndex1()
         + newline);
     log.setCaretPosition(log.getDocument().getLength());
   }
   public void intervalAdded(ListDataEvent e) {
     log.append("intervalAdded: " + e.getIndex0() + ", " + e.getIndex1()
         + newline);
     log.setCaretPosition(log.getDocument().getLength());
   }
   public void intervalRemoved(ListDataEvent e) {
     log.append("intervalRemoved: " + e.getIndex0() + ", " + e.getIndex1()
         + newline);
     log.setCaretPosition(log.getDocument().getLength());
   }
 }
 class DeleteButtonListener implements ActionListener {
   public void actionPerformed(ActionEvent e) {
     /*
      * This method can be called only if there"s a valid selection, so go
      * ahead and remove whatever"s selected.
      */
     ListSelectionModel lsm = list.getSelectionModel();
     int firstSelected = lsm.getMinSelectionIndex();
     int lastSelected = lsm.getMaxSelectionIndex();
     listModel.removeRange(firstSelected, lastSelected);
     int size = listModel.size();
     if (size == 0) {
       // List is empty: disable delete, up, and down buttons.
       deleteButton.setEnabled(false);
       upButton.setEnabled(false);
       downButton.setEnabled(false);
     } else {
       // Adjust the selection.
       if (firstSelected == listModel.getSize()) {
         // Removed item in last position.
         firstSelected--;
       }
       list.setSelectedIndex(firstSelected);
     }
   }
 }
 /** A listener shared by the text field and add button. */
 class AddButtonListener implements ActionListener {
   public void actionPerformed(ActionEvent e) {
     if (nameField.getText().equals("")) {
       // User didn"t type in a name...
       Toolkit.getDefaultToolkit().beep();
       return;
     }
     int index = list.getSelectedIndex();
     int size = listModel.getSize();
     // If no selection or if item in last position is selected,
     // add the new one to end of list, and select new one.
     if (index == -1 || (index + 1 == size)) {
       listModel.addElement(nameField.getText());
       list.setSelectedIndex(size);
       // Otherwise insert the new one after the current selection,
       // and select new one.
     } else {
       listModel.insertElementAt(nameField.getText(), index + 1);
       list.setSelectedIndex(index + 1);
     }
   }
 }
 // Listen for clicks on the up and down arrow buttons.
 class UpDownListener implements ActionListener {
   public void actionPerformed(ActionEvent e) {
     // This method can be called only when
     // there"s a valid selection,
     // so go ahead and move the list item.
     int moveMe = list.getSelectedIndex();
     if (e.getActionCommand().equals(upString)) {
       // UP ARROW BUTTON
       if (moveMe != 0) {
         // not already at top
         swap(moveMe, moveMe - 1);
         list.setSelectedIndex(moveMe - 1);
         list.ensureIndexIsVisible(moveMe - 1);
       }
     } else {
       // DOWN ARROW BUTTON
       if (moveMe != listModel.getSize() - 1) {
         // not already at bottom
         swap(moveMe, moveMe + 1);
         list.setSelectedIndex(moveMe + 1);
         list.ensureIndexIsVisible(moveMe + 1);
       }
     }
   }
 }
 // Swap two elements in the list.
 private void swap(int a, int b) {
   Object aObject = listModel.getElementAt(a);
   Object bObject = listModel.getElementAt(b);
   listModel.set(a, bObject);
   listModel.set(b, aObject);
 }
 // Listener method for list selection changes.
 public void valueChanged(ListSelectionEvent e) {
   if (e.getValueIsAdjusting() == false) {
     if (list.getSelectedIndex() == -1) {
       // No selection: disable delete, up, and down buttons.
       deleteButton.setEnabled(false);
       upButton.setEnabled(false);
       downButton.setEnabled(false);
       nameField.setText("");
     } else if (list.getSelectedIndices().length > 1) {
       // Multiple selection: disable up and down buttons.
       deleteButton.setEnabled(true);
       upButton.setEnabled(false);
       downButton.setEnabled(false);
     } else {
       // Single selection: permit all operations.
       deleteButton.setEnabled(true);
       upButton.setEnabled(true);
       downButton.setEnabled(true);
       nameField.setText(list.getSelectedValue().toString());
     }
   }
 }
 /** Returns an ImageIcon, or null if the path was invalid. */
 protected static ImageIcon createImageIcon(String imageName) {
   String imgLocation = "toolbarButtonGraphics/navigation/" + imageName
       + ".gif";
   java.net.URL imageURL = Main.class.getResource(imgLocation);
   if (imageURL == null) {
     System.err.println("Resource not found: " + imgLocation);
     return null;
   } else {
     return new ImageIcon(imageURL);
   }
 }
 /**
  * Create the GUI and show it. For thread safety, this method should be
  * invoked from the event-dispatching thread.
  */
 private static void createAndShowGUI() {
   // Create and set up the window.
   JFrame frame = new JFrame("ListDataEventDemo");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   // Create and set up the content pane.
   JComponent newContentPane = new Main();
   newContentPane.setOpaque(true); // content panes must be opaque
   frame.setContentPane(newContentPane);
   // Don"t let the content pane get too small.
   // (Works if the Java look and feel provides
   // the window decorations.)
   newContentPane.setMinimumSize(new Dimension(newContentPane
       .getPreferredSize().width, 100));
   // Display the window.
   frame.pack();
   frame.setVisible(true);
 }
 public static void main(String[] args) {
   // Schedule a job for the event-dispatching thread:
   // creating and showing this application"s GUI.
   javax.swing.SwingUtilities.invokeLater(new Runnable() {
     public void run() {
       createAndShowGUI();
     }
   });
 }

}

 </source>

JList: setSelectedValue(Object anObject, boolean shouldScroll)

   <source lang="java">

import javax.swing.JList; public class Main {

 public static void main(String[] argv) throws Exception {
   String[] items = { "A", "B", "C", "D" };
   JList list = new JList(items);
   boolean scrollIntoView = true;
   list.setSelectedValue("B", scrollIntoView);
 }

}

 </source>

JList: setSelectionInterval(int anchor, int lead)

   <source lang="java">

import javax.swing.JList; public class Main {

 public static void main(String[] argv) throws Exception {
   String[] items = { "A", "B", "C", "D" };
   JList list = new JList(items);
   // Select the second item
   int start = 1;
   int end = 1;
   list.setSelectionInterval(start, end);
 }

}

 </source>

JList: setSelectionMode(int selectionMode)

   <source lang="java">

/*

* Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
*   - Redistributions of source code must retain the above copyright
*     notice, this list of conditions and the following disclaimer.
*
*   - Redistributions in binary form must reproduce the above copyright
*     notice, this list of conditions and the following disclaimer in the
*     documentation and/or other materials provided with the distribution.
*
*   - Neither the name of Sun Microsystems nor the names of its
*     contributors may be used to endorse or promote products derived
*     from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/*

* ListDataEventDemo.java requires the Java Look and Feel Graphics
* Repository (jlfgr-1_0.jar).  You can download this file from
* http://java.sun.ru/developer/techDocs/hi/repository/
* Put it in the class path using one of the following commands
* (assuming jlfgr-1_0.jar is in a subdirectory named jars):
*
*   java -cp .;jars/jlfgr-1_0.jar ListDataEventDemo [Microsoft Windows]
*   java -cp .:jars/jlfgr-1_0.jar ListDataEventDemo [UNIX]
*/

import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.GridLayout; import java.awt.Insets; import java.awt.Toolkit; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.DefaultListModel; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JSplitPane; import javax.swing.JTextArea; import javax.swing.JTextField; import javax.swing.ListSelectionModel; import javax.swing.event.ListDataEvent; import javax.swing.event.ListDataListener; import javax.swing.event.ListSelectionEvent; import javax.swing.event.ListSelectionListener; public class Main extends JPanel implements ListSelectionListener {

 private JList list;
 private DefaultListModel listModel;
 private static final String addString = "Add";
 private static final String deleteString = "Delete";
 private static final String upString = "Move up";
 private static final String downString = "Move down";
 private JButton addButton;
 private JButton deleteButton;
 private JButton upButton;
 private JButton downButton;
 private JTextField nameField;
 private JTextArea log;
 static private String newline = "\n";
 public Main() {
   super(new BorderLayout());
   // Create and populate the list model.
   listModel = new DefaultListModel();
   listModel.addElement("Whistler, Canada");
   listModel.addElement("Jackson Hole, Wyoming");
   listModel.addElement("Squaw Valley, California");
   listModel.addElement("Telluride, Colorado");
   listModel.addElement("Taos, New Mexico");
   listModel.addElement("Snowbird, Utah");
   listModel.addElement("Chamonix, France");
   listModel.addElement("Banff, Canada");
   listModel.addElement("Arapahoe Basin, Colorado");
   listModel.addElement("Kirkwood, California");
   listModel.addElement("Sun Valley, Idaho");
   listModel.addListDataListener(new MyListDataListener());
   // Create the list and put it in a scroll pane.
   list = new JList(listModel);
   list.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
   list.setSelectedIndex(0);
   list.addListSelectionListener(this);
   JScrollPane listScrollPane = new JScrollPane(list);
   // Create the list-modifying buttons.
   addButton = new JButton(addString);
   addButton.setActionCommand(addString);
   addButton.addActionListener(new AddButtonListener());
   deleteButton = new JButton(deleteString);
   deleteButton.setActionCommand(deleteString);
   deleteButton.addActionListener(new DeleteButtonListener());
   ImageIcon icon = createImageIcon("Up16");
   if (icon != null) {
     upButton = new JButton(icon);
     upButton.setMargin(new Insets(0, 0, 0, 0));
   } else {
     upButton = new JButton("Move up");
   }
   upButton.setToolTipText("Move the currently selected list item higher.");
   upButton.setActionCommand(upString);
   upButton.addActionListener(new UpDownListener());
   icon = createImageIcon("Down16");
   if (icon != null) {
     downButton = new JButton(icon);
     downButton.setMargin(new Insets(0, 0, 0, 0));
   } else {
     downButton = new JButton("Move down");
   }
   downButton.setToolTipText("Move the currently selected list item lower.");
   downButton.setActionCommand(downString);
   downButton.addActionListener(new UpDownListener());
   JPanel upDownPanel = new JPanel(new GridLayout(2, 1));
   upDownPanel.add(upButton);
   upDownPanel.add(downButton);
   // Create the text field for entering new names.
   nameField = new JTextField(15);
   nameField.addActionListener(new AddButtonListener());
   String name = listModel.getElementAt(list.getSelectedIndex()).toString();
   nameField.setText(name);
   // Create a control panel, using the default FlowLayout.
   JPanel buttonPane = new JPanel();
   buttonPane.add(nameField);
   buttonPane.add(addButton);
   buttonPane.add(deleteButton);
   buttonPane.add(upDownPanel);
   // Create the log for reporting list data events.
   log = new JTextArea(10, 20);
   JScrollPane logScrollPane = new JScrollPane(log);
   // Create a split pane for the log and the list.
   JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT,
       listScrollPane, logScrollPane);
   splitPane.setResizeWeight(0.5);
   // Put everything together.
   add(buttonPane, BorderLayout.PAGE_START);
   add(splitPane, BorderLayout.CENTER);
 }
 class MyListDataListener implements ListDataListener {
   public void contentsChanged(ListDataEvent e) {
     log.append("contentsChanged: " + e.getIndex0() + ", " + e.getIndex1()
         + newline);
     log.setCaretPosition(log.getDocument().getLength());
   }
   public void intervalAdded(ListDataEvent e) {
     log.append("intervalAdded: " + e.getIndex0() + ", " + e.getIndex1()
         + newline);
     log.setCaretPosition(log.getDocument().getLength());
   }
   public void intervalRemoved(ListDataEvent e) {
     log.append("intervalRemoved: " + e.getIndex0() + ", " + e.getIndex1()
         + newline);
     log.setCaretPosition(log.getDocument().getLength());
   }
 }
 class DeleteButtonListener implements ActionListener {
   public void actionPerformed(ActionEvent e) {
     /*
      * This method can be called only if there"s a valid selection, so go
      * ahead and remove whatever"s selected.
      */
     ListSelectionModel lsm = list.getSelectionModel();
     int firstSelected = lsm.getMinSelectionIndex();
     int lastSelected = lsm.getMaxSelectionIndex();
     listModel.removeRange(firstSelected, lastSelected);
     int size = listModel.size();
     if (size == 0) {
       // List is empty: disable delete, up, and down buttons.
       deleteButton.setEnabled(false);
       upButton.setEnabled(false);
       downButton.setEnabled(false);
     } else {
       // Adjust the selection.
       if (firstSelected == listModel.getSize()) {
         // Removed item in last position.
         firstSelected--;
       }
       list.setSelectedIndex(firstSelected);
     }
   }
 }
 /** A listener shared by the text field and add button. */
 class AddButtonListener implements ActionListener {
   public void actionPerformed(ActionEvent e) {
     if (nameField.getText().equals("")) {
       // User didn"t type in a name...
       Toolkit.getDefaultToolkit().beep();
       return;
     }
     int index = list.getSelectedIndex();
     int size = listModel.getSize();
     // If no selection or if item in last position is selected,
     // add the new one to end of list, and select new one.
     if (index == -1 || (index + 1 == size)) {
       listModel.addElement(nameField.getText());
       list.setSelectedIndex(size);
       // Otherwise insert the new one after the current selection,
       // and select new one.
     } else {
       listModel.insertElementAt(nameField.getText(), index + 1);
       list.setSelectedIndex(index + 1);
     }
   }
 }
 // Listen for clicks on the up and down arrow buttons.
 class UpDownListener implements ActionListener {
   public void actionPerformed(ActionEvent e) {
     // This method can be called only when
     // there"s a valid selection,
     // so go ahead and move the list item.
     int moveMe = list.getSelectedIndex();
     if (e.getActionCommand().equals(upString)) {
       // UP ARROW BUTTON
       if (moveMe != 0) {
         // not already at top
         swap(moveMe, moveMe - 1);
         list.setSelectedIndex(moveMe - 1);
         list.ensureIndexIsVisible(moveMe - 1);
       }
     } else {
       // DOWN ARROW BUTTON
       if (moveMe != listModel.getSize() - 1) {
         // not already at bottom
         swap(moveMe, moveMe + 1);
         list.setSelectedIndex(moveMe + 1);
         list.ensureIndexIsVisible(moveMe + 1);
       }
     }
   }
 }
 // Swap two elements in the list.
 private void swap(int a, int b) {
   Object aObject = listModel.getElementAt(a);
   Object bObject = listModel.getElementAt(b);
   listModel.set(a, bObject);
   listModel.set(b, aObject);
 }
 // Listener method for list selection changes.
 public void valueChanged(ListSelectionEvent e) {
   if (e.getValueIsAdjusting() == false) {
     if (list.getSelectedIndex() == -1) {
       // No selection: disable delete, up, and down buttons.
       deleteButton.setEnabled(false);
       upButton.setEnabled(false);
       downButton.setEnabled(false);
       nameField.setText("");
     } else if (list.getSelectedIndices().length > 1) {
       // Multiple selection: disable up and down buttons.
       deleteButton.setEnabled(true);
       upButton.setEnabled(false);
       downButton.setEnabled(false);
     } else {
       // Single selection: permit all operations.
       deleteButton.setEnabled(true);
       upButton.setEnabled(true);
       downButton.setEnabled(true);
       nameField.setText(list.getSelectedValue().toString());
     }
   }
 }
 /** Returns an ImageIcon, or null if the path was invalid. */
 protected static ImageIcon createImageIcon(String imageName) {
   String imgLocation = "toolbarButtonGraphics/navigation/" + imageName
       + ".gif";
   java.net.URL imageURL = Main.class.getResource(imgLocation);
   if (imageURL == null) {
     System.err.println("Resource not found: " + imgLocation);
     return null;
   } else {
     return new ImageIcon(imageURL);
   }
 }
 /**
  * Create the GUI and show it. For thread safety, this method should be
  * invoked from the event-dispatching thread.
  */
 private static void createAndShowGUI() {
   // Create and set up the window.
   JFrame frame = new JFrame("ListDataEventDemo");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   // Create and set up the content pane.
   JComponent newContentPane = new Main();
   newContentPane.setOpaque(true); // content panes must be opaque
   frame.setContentPane(newContentPane);
   // Don"t let the content pane get too small.
   // (Works if the Java look and feel provides
   // the window decorations.)
   newContentPane.setMinimumSize(new Dimension(newContentPane
       .getPreferredSize().width, 100));
   // Display the window.
   frame.pack();
   frame.setVisible(true);
 }
 public static void main(String[] args) {
   // Schedule a job for the event-dispatching thread:
   // creating and showing this application"s GUI.
   javax.swing.SwingUtilities.invokeLater(new Runnable() {
     public void run() {
       createAndShowGUI();
     }
   });
 }

}

 </source>

JList: setVisibleRowCount(int count)

   <source lang="java">

import java.awt.BorderLayout; import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JScrollPane; public class MainClass {

 public static void main(final String args[]) {
   String labels[] = { "A", "B", "C", "D", "E" };
   JFrame frame = new JFrame("Sizing Samples");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JList jlist1 = new JList(labels);
   jlist1.setVisibleRowCount(4);
   JScrollPane scrollPane1 = new JScrollPane(jlist1);
   frame.add(scrollPane1, BorderLayout.NORTH);
 
   frame.setSize(300, 350);
   frame.setVisible(true);
 }

}

 </source>

JList.VERTICAL_WRAP

   <source lang="java">

import javax.swing.JList; import javax.swing.JScrollPane; public class Main {

 public static void main(String[] argv) throws Exception {
   String[] items = { "A", "B", "C", "D" };
   JList list = new JList(items);
   JScrollPane scrollingList = new JScrollPane(list);
   // Change orientation to top-to-bottom, left-to-right layout
   list.setLayoutOrientation(JList.VERTICAL_WRAP);
 }

}

 </source>

new JList(ListModel dataModel) (Share model with JComboBox)

   <source lang="java">

import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.DefaultComboBoxModel; import javax.swing.JButton; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JPanel; import javax.swing.JScrollPane; public class MainClass {

 public static void main(final String args[]) {
   final String labels[] = { "A", "B", "C", "D", "E" };
   final DefaultComboBoxModel model = new DefaultComboBoxModel(labels);
   JFrame frame = new JFrame("Shared Data");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JComboBox comboBox1 = new JComboBox(model);
   comboBox1.setMaximumRowCount(5);
   comboBox1.setEditable(true);
   frame.add(comboBox1, BorderLayout.NORTH);
   
   JList jlist = new JList(model);
   JScrollPane scrollPane = new JScrollPane(jlist);
   frame.add(scrollPane, BorderLayout.CENTER);
   JButton button = new JButton("Add");
   frame.add(button, BorderLayout.SOUTH);
   ActionListener actionListener = new ActionListener() {
     public void actionPerformed(ActionEvent actionEvent) {
       model.addElement("a");
     }
   };
   button.addActionListener(actionListener);

   frame.setSize(300, 200);
   frame.setVisible(true);
 }

}

 </source>

new JList(Object[] listData)

   <source lang="java">

import java.awt.BorderLayout; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JList; import javax.swing.JScrollPane; public class MainClass {

 public static void main(final String args[]) {
   String labels[] = { "A", "B", "C", "D", "E" };
   JFrame frame = new JFrame("Selection Modes");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JList list1 = new JList(labels);
   JScrollPane sp1 = new JScrollPane(list1);
   sp1.setColumnHeaderView(new JLabel("List"));
   frame.add(sp1, BorderLayout.CENTER);
   frame.setSize(300, 200);
   frame.setVisible(true);
 }

}

 </source>

new JList(Vector<?> listData)

   <source lang="java">

import java.util.Vector; import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JScrollPane; public class Main {

 public static void main(String[] a) {
   JFrame frame = new JFrame();
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   Vector months = new Vector();
   JList list = new JList(months);
   months.addElement("January");
   months.addElement("December");
   frame.add(new JScrollPane(list));
   frame.setSize(300, 200);
   frame.setVisible(true);
 }

}

 </source>

new JScrollPane(JList list)

   <source lang="java">

import java.awt.BorderLayout; import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JScrollPane; public class MainClass extends JFrame {

 JScrollPane scrollpane;
 public MainClass() {
   super("JScrollPane Demonstration");
   setSize(300, 200);
   setDefaultCloseOperation(EXIT_ON_CLOSE);
   String categories[] = { "A", "B", "C", "D", "E", "F" };
   JList list = new JList(categories);
   scrollpane = new JScrollPane(list);
   getContentPane().add(scrollpane, BorderLayout.CENTER);
 }
 public static void main(String args[]) {
   MainClass sl = new MainClass();
   sl.setVisible(true);
 }

}

 </source>

Java by API/javax.swing/JList

Содержание

extends JList (custom tooltops)

JList: addListSelectionListener(ListSelectionListener listener)

JList: addMouseListener(MouseListener lis)

JList: addSelectionInterval(int anchor, int lead)

JList: clearSelection()

JList: getFirstVisibleIndex()

JList: getLastVisibleIndex()

JList: getLayoutOrientation()

JList: getMaxSelectionIndex()

JList: getNextMatch(String prefix, int startIndex, Bias bias)

JList: getSelectedIndices()

JList: getSelectedValues()

JList.getSelectionBackground()

JList: getSelectionForeground()

JList: getVisibleRowCount()

JList: isSelectedIndex(int index)

JList: isSelectionEmpty()

JList: locationToIndex(Point p)

JList: removeSelectionInterval(int index0, int index1)

JList: setCellRenderer(ListCellRenderer cellRenderer)

JList: setDragEnabled(boolean b)

JList: setFixedCellHeight(int height)

JList: setFixedCellWidth(int width)

JList: setLayoutOrientation(int ori)

JList: setModel(ListModel model)

JList: setPrototypeCellValue(Object prototypeCellValue)

JList: setSelectedIndex(int index)

JList: setSelectedValue(Object anObject, boolean shouldScroll)

JList: setSelectionInterval(int anchor, int lead)

JList: setSelectionMode(int selectionMode)

JList: setVisibleRowCount(int count)

JList.VERTICAL_WRAP

new JList(ListModel dataModel) (Share model with JComboBox)

new JList(Object[] listData)

new JList(Vector<?> listData)

new JScrollPane(JList list)

Навигация

Поиск