Java by API/javax.swing/UIManager

UIManager: getBorder(Object key)

  
import java.awt.BorderLayout;
import java.awt.ruponent;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
public class MainClass {
  public static void main(String args[]) {
    String rows[][] = { { "A", "a" }, { "B", "b" }, { "E", "e" } };
    String headers[] = { "Upper", "Lower" };
    JFrame frame = new JFrame("Label Header");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JTable table = new JTable(rows, headers);
    JScrollPane scrollPane = new JScrollPane(table);
    Border headerBorder = UIManager.getBorder("TableHeader.cellBorder");
    JLabel headerLabel1 = new JLabel(headers[0], JLabel.CENTER);
    headerLabel1.setBorder(headerBorder);
    JLabel headerLabel2 = new JLabel(headers[1], JLabel.CENTER);
    headerLabel2.setBorder(headerBorder);
    TableCellRenderer renderer = new JComponentTableCellRenderer();
    TableColumnModel columnModel = table.getColumnModel();
    TableColumn column0 = columnModel.getColumn(0);
    TableColumn column1 = columnModel.getColumn(1);
    column0.setHeaderRenderer(renderer);
    column0.setHeaderValue(headerLabel1);
    column1.setHeaderRenderer(renderer);
    column1.setHeaderValue(headerLabel2);
    frame.add(scrollPane, BorderLayout.CENTER);
    frame.setSize(300, 150);
    frame.setVisible(true);
  }
}
class JComponentTableCellRenderer implements TableCellRenderer {
  public Component getTableCellRendererComponent(JTable table, Object value, 
      boolean isSelected, boolean hasFocus, int row, int column) {
    return (JComponent)value;
  }
}

UIManager: getCrossPlatformLookAndFeelClassName()

  

import javax.swing.JFrame;
import javax.swing.UIManager;
public class Main {
  public static void main(String[] args) {
    try {
      UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
    } catch (Exception e) {
      System.err.println("Look and feel not set.");
    }
    JFrame aWindow = new JFrame("This is the Window Title");
    aWindow.setBounds(50, 100, 300, 300);
    aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    aWindow.setVisible(true);
  }
}

UIManager: getInstalledLookAndFeels()

  
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.JOptionPane;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
public class MainClass {
  public static void main(String args[]) {
    final JFrame frame = new JFrame("Change Look");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    ActionListener actionListener = new ActionListener() {
      public void actionPerformed(ActionEvent actionEvent) {
        Object source = actionEvent.getSource();
        String lafClassName = null;
        if (source instanceof JComboBox) {
          JComboBox comboBox = (JComboBox) source;
          lafClassName = (String) comboBox.getSelectedItem();
        } else if (source instanceof JButton) {
          lafClassName = actionEvent.getActionCommand();
        }
        if (lafClassName != null) {
          final String finalLafClassName = lafClassName;
          try {
            UIManager.setLookAndFeel(finalLafClassName);
            SwingUtilities.updateComponentTreeUI(frame);
          } catch (Exception exception) {
            JOptionPane.showMessageDialog(frame, "Can"t change look and feel", "Invalid PLAF",
                JOptionPane.ERROR_MESSAGE);
          }
        }
      }
    };
    UIManager.LookAndFeelInfo looks[] = UIManager.getInstalledLookAndFeels();
    DefaultComboBoxModel model = new DefaultComboBoxModel();
    JComboBox comboBox = new JComboBox(model);
    JPanel panel = new JPanel();
    for (int i = 0, n = looks.length; i < n; i++) {
      JButton button = new JButton(looks[i].getName());
      model.addElement(looks[i].getClassName());
      button.setActionCommand(looks[i].getClassName());
      button.addActionListener(actionListener);
      panel.add(button);
    }
    comboBox.addActionListener(actionListener);
    frame.add(comboBox, BorderLayout.NORTH);
    frame.add(panel, BorderLayout.SOUTH);
    frame.setSize(350, 150);
    frame.setVisible(true);
  }
}

UIManager: getLookAndFeelDefaults()

  

import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import javax.swing.UIManager;
public class Main {
  public static void main(String[] args) throws Exception {
    Set defaults = UIManager.getLookAndFeelDefaults().entrySet();
    for (Iterator i = defaults.iterator(); i.hasNext();) {
      Map.Entry entry = (Map.Entry) i.next();
      System.out.print(entry.getKey() + " = ");
      System.out.println(entry.getValue());
    }
  }
}

UIManager: get(Object key)

  

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIDefaults;
import javax.swing.UIManager;
public class Main {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Active Example");
    UIManager.put("LabelFactory", new ActiveLabel());
    final JPanel panel = new JPanel();
    JButton button = new JButton("Get");
    ActionListener actionListener = new ActionListener() {
      public void actionPerformed(ActionEvent actionEvent) {
        JLabel label = (JLabel) UIManager.get("LabelFactory");
        panel.add(label);
        panel.revalidate();
      }
    };
    button.addActionListener(actionListener);
    Container contentPane = frame.getContentPane();
    contentPane.add(panel, BorderLayout.CENTER);
    contentPane.add(button, BorderLayout.SOUTH);
    frame.setSize(200, 200);
    frame.setVisible(true);
  }
}
class ActiveLabel implements UIDefaults.ActiveValue {
  private int counter = 0;
  public Object createValue(UIDefaults defaults) {
    JLabel label = new JLabel("" + counter++);
    return label;
  }
}

UIManager: getSystemLookAndFeelClassName()

  
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JRadioButton;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
public class MainClass {
  protected JFrame theFrame = new JFrame("LNF Switcher");
  protected Container cp;
  protected String curLF = "javax.swing.plaf.metal.MetalLookAndFeel";
  protected JRadioButton previousButton;
  public MainClass() {
    theFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    cp = theFrame.getContentPane();
    cp.setLayout(new FlowLayout());
    ButtonGroup bg = new ButtonGroup();
    JRadioButton bJava = new JRadioButton("Java");
    bJava.addActionListener(new LNFSetter("javax.swing.plaf.metal.MetalLookAndFeel", bJava));
    bg.add(bJava);
    cp.add(bJava);
    JRadioButton bMSW = new JRadioButton("MS-Windows");
    bMSW.addActionListener(new LNFSetter("com.sun.java.swing.plaf.windows.WindowsLookAndFeel", bMSW));
    bg.add(bMSW);
    cp.add(bMSW);
    JRadioButton bMotif = new JRadioButton("Motif");
    bMotif.addActionListener(new LNFSetter("com.sun.java.swing.plaf.motif.MotifLookAndFeel", bMotif));
    bg.add(bMotif);
    cp.add(bMotif);
    JRadioButton bMac = new JRadioButton("Sun-MacOS");
    bMac.addActionListener(new LNFSetter("com.sun.java.swing.plaf.mac.MacLookAndFeel", bMac));
    bg.add(bMac);
    cp.add(bMac);
    String defaultLookAndFeel = UIManager.getSystemLookAndFeelClassName();
    JRadioButton bDefault = new JRadioButton("Default");
    bDefault.addActionListener(new LNFSetter(defaultLookAndFeel, bDefault));
    bg.add(bDefault);
    cp.add(bDefault);
    (previousButton = bDefault).setSelected(true);
    theFrame.pack();
    theFrame.setVisible(true);
  }
  class LNFSetter implements ActionListener {
    String theLNFName;
    JRadioButton thisButton;
    LNFSetter(String lnfName, JRadioButton me) {
      theLNFName = lnfName;
      thisButton = me;
    }
    public void actionPerformed(ActionEvent e) {
      try {
        UIManager.setLookAndFeel(theLNFName);
        SwingUtilities.updateComponentTreeUI(theFrame);
        theFrame.pack();
      } catch (Exception evt) {
        JOptionPane.showMessageDialog(null, "setLookAndFeel didn"t work: " + evt, "UI Failure",
            JOptionPane.INFORMATION_MESSAGE);
        previousButton.setSelected(true); // reset the GUI to agree
      }
      previousButton = thisButton;
    }
  }
  public static void main(String[] argv) {
    new MainClass();
  }
}

UIManager.LookAndFeelInfo: getClassName()

  
import javax.swing.UIManager;
public class MainClass {
  public static void main (String args[]) {
    UIManager.LookAndFeelInfo plaf[] = UIManager.getInstalledLookAndFeels();
    for (int i=0, n=plaf.length; i<n; i++) {
      System.out.println("Name: " + plaf[i].getName());
      System.out.println("  Class name: " + plaf[i].getClassName());
    }
  }
}

UIManager.LookAndFeelInfo: getClassName() (2)

  
/*
javax.swing.plaf.metal.MetalLookAndFeel
com.sun.java.swing.plaf.motif.MotifLookAndFeel
com.sun.java.swing.plaf.windows.WindowsLookAndFeel
com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel
*/
import javax.swing.UIManager;
import javax.swing.UIManager.LookAndFeelInfo;
public class MainClass {
  public static void main(String[] args) throws Exception {
    UIManager.LookAndFeelInfo[] infos = UIManager.getInstalledLookAndFeels();
    for (int i = 0; i < infos.length; i++) {
      LookAndFeelInfo info = infos[i];
      System.out.println(info.getClassName());
     
    } 
  }
}

UIManager.LookAndFeelInfo: getName()

  
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.JOptionPane;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
public class MainClass {
  public static void main(String args[]) {
    final JFrame frame = new JFrame("Change Look");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    ActionListener actionListener = new ActionListener() {
      public void actionPerformed(ActionEvent actionEvent) {
        Object source = actionEvent.getSource();
        String lafClassName = null;
        if (source instanceof JComboBox) {
          JComboBox comboBox = (JComboBox) source;
          lafClassName = (String) comboBox.getSelectedItem();
        } else if (source instanceof JButton) {
          lafClassName = actionEvent.getActionCommand();
        }
        if (lafClassName != null) {
          final String finalLafClassName = lafClassName;
          try {
            UIManager.setLookAndFeel(finalLafClassName);
            SwingUtilities.updateComponentTreeUI(frame);
          } catch (Exception exception) {
            JOptionPane.showMessageDialog(frame, "Can"t change look and feel", "Invalid PLAF",
                JOptionPane.ERROR_MESSAGE);
          }
        }
      }
    };
    UIManager.LookAndFeelInfo looks[] = UIManager.getInstalledLookAndFeels();
    DefaultComboBoxModel model = new DefaultComboBoxModel();
    JComboBox comboBox = new JComboBox(model);
    JPanel panel = new JPanel();
    for (int i = 0, n = looks.length; i < n; i++) {
      JButton button = new JButton(looks[i].getName());
      model.addElement(looks[i].getClassName());
      button.setActionCommand(looks[i].getClassName());
      button.addActionListener(actionListener);
      panel.add(button);
    }
    comboBox.addActionListener(actionListener);
    frame.add(comboBox, BorderLayout.NORTH);
    frame.add(panel, BorderLayout.SOUTH);
    frame.setSize(350, 150);
    frame.setVisible(true);
  }
}

UIManager: put(Object key, Object value)

  
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.UIManager;
public class MainClass {
  public static void main(final String args[]) {
    UIManager.put("OptionPane.cancelButtonText", "Annuler");
    UIManager.put("OptionPane.noButtonText", "Non");
    UIManager.put("OptionPane.okButtonText", "D"accord");
    UIManager.put("OptionPane.yesButtonText", "Oui");
    int result = JOptionPane.showConfirmDialog(new JFrame(),
        "Est-ce que vous avez 18 ans ou plus?", "Choisisez une option",
        JOptionPane.YES_NO_CANCEL_OPTION);
    if (result == JOptionPane.YES_OPTION) {
      System.out.println("Yes");
    } else if (result == JOptionPane.NO_OPTION) {
      System.out.println("No");
    } else if (result == JOptionPane.CANCEL_OPTION) {
      System.out.println("Cancel");
    } else if (result == JOptionPane.CLOSED_OPTION) {
      System.out.println("Closed");
    }
  }
}

UIManager: setLookAndFeel(String className)

  
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JRadioButton;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
public class MainClass {
  protected JFrame theFrame = new JFrame("LNF Switcher");
  protected Container cp;
  protected String curLF = "javax.swing.plaf.metal.MetalLookAndFeel";
  protected JRadioButton previousButton;
  public MainClass() {
    theFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    cp = theFrame.getContentPane();
    cp.setLayout(new FlowLayout());
    ButtonGroup bg = new ButtonGroup();
    JRadioButton bJava = new JRadioButton("Java");
    bJava.addActionListener(new LNFSetter("javax.swing.plaf.metal.MetalLookAndFeel", bJava));
    bg.add(bJava);
    cp.add(bJava);
    JRadioButton bMSW = new JRadioButton("MS-Windows");
    bMSW.addActionListener(new LNFSetter("com.sun.java.swing.plaf.windows.WindowsLookAndFeel", bMSW));
    bg.add(bMSW);
    cp.add(bMSW);
    JRadioButton bMotif = new JRadioButton("Motif");
    bMotif.addActionListener(new LNFSetter("com.sun.java.swing.plaf.motif.MotifLookAndFeel", bMotif));
    bg.add(bMotif);
    cp.add(bMotif);
    JRadioButton bMac = new JRadioButton("Sun-MacOS");
    bMac.addActionListener(new LNFSetter("com.sun.java.swing.plaf.mac.MacLookAndFeel", bMac));
    bg.add(bMac);
    cp.add(bMac);
    String defaultLookAndFeel = UIManager.getSystemLookAndFeelClassName();
    JRadioButton bDefault = new JRadioButton("Default");
    bDefault.addActionListener(new LNFSetter(defaultLookAndFeel, bDefault));
    bg.add(bDefault);
    cp.add(bDefault);
    (previousButton = bDefault).setSelected(true);
    theFrame.pack();
    theFrame.setVisible(true);
  }
  class LNFSetter implements ActionListener {
    String theLNFName;
    JRadioButton thisButton;
    LNFSetter(String lnfName, JRadioButton me) {
      theLNFName = lnfName;
      thisButton = me;
    }
    public void actionPerformed(ActionEvent e) {
      try {
        UIManager.setLookAndFeel(theLNFName);
        SwingUtilities.updateComponentTreeUI(theFrame);
        theFrame.pack();
      } catch (Exception evt) {
        JOptionPane.showMessageDialog(null, "setLookAndFeel didn"t work: " + evt, "UI Failure",
            JOptionPane.INFORMATION_MESSAGE);
        previousButton.setSelected(true); // reset the GUI to agree
      }
      previousButton = thisButton;
    }
  }
  public static void main(String[] argv) {
    new MainClass();
  }
}