Java by API/java.awt/Component

Содержание

1 Component.BOTTOM_ALIGNMENT
2 Component.CENTER_ALIGNMENT
3 Component: enableEvents(long eventsToEnable)
4 Component: getAccessibleContext()
5 Component: getLocationOnScreen()
6 Component: isFocusable()
7 Component: isFocusCycleRoot
8 Component.LEFT_ALIGNMENT
9 Component: requestFocusInWindow()
10 Component.RIGHT_ALIGNMENT
11 Component: setBounds(int x,int y,int width,int height)
12 Component: setComponentOrientation(ComponentOrientation o)
13 Component: setLocation(int x, int y)
14 Component: setSize(int width, int height)
15 Component.TOP_ALIGNMENT

Component.BOTTOM_ALIGNMENT

  
import java.awt.BorderLayout;
import java.awt.ruponent;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainClass {
  public static void main(String[] a) {
    JFrame frame = new JFrame("Alignment Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    String labels[] = { "--", "----", "--------", "------------" };
    JPanel container = new JPanel();
    BoxLayout layout = new BoxLayout(container, BoxLayout.X_AXIS);
    container.setLayout(layout);
    for (int i = 0; i < labels.length; i++) {
      JButton button = new JButton(labels[i]);
      button.setAlignmentX(Component.BOTTOM_ALIGNMENT);
      container.add(button);
    }
    frame.add(container, BorderLayout.CENTER);
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}

Component.CENTER_ALIGNMENT

  
import java.awt.BorderLayout;
import java.awt.ruponent;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainClass {
  public static void main(String[] a) {
    JFrame frame = new JFrame("Alignment Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    String labels[] = { "--", "----", "--------", "------------" };
    JPanel container = new JPanel();
    BoxLayout layout = new BoxLayout(container, BoxLayout.Y_AXIS);
    container.setLayout(layout);
    for (int i = 0; i < labels.length; i++) {
      JButton button = new JButton(labels[i]);
      button.setAlignmentX(Component.CENTER_ALIGNMENT);
      container.add(button);
    }
    frame.add(container, BorderLayout.CENTER);
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}

Component: enableEvents(long eventsToEnable)

  
// This example is from the book _Java AWT Reference_ by John Zukowski.
// Written by John Zukowski.  Copyright (c) 1997 O"Reilly & Associates.
// You may study, use, modify, and distribute this example for any purpose.
// This example is provided WITHOUT WARRANTY either expressed or
import java.awt.AWTEvent;
import java.awt.AWTEventMulticaster;
import java.awt.ruponent;
import java.awt.Frame;
import java.awt.ItemSelectable;
import java.awt.SystemColor;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.MouseEvent;
class ItemEventComponent extends Component implements ItemSelectable {
  boolean selected;
  int i = 0;
  ItemListener itemListener = null;
  ItemEventComponent() {
    enableEvents(AWTEvent.MOUSE_EVENT_MASK);
  }
  public Object[] getSelectedObjects() {
    Object o[] = new Object[1];
    o[0] = new Integer(i);
    return o;
  }
  public void addItemListener(ItemListener l) {
    itemListener = AWTEventMulticaster.add(itemListener, l);
  }
  public void removeItemListener(ItemListener l) {
    itemListener = AWTEventMulticaster.remove(itemListener, l);
  }
  public void processEvent(AWTEvent e) {
    if (e.getID() == MouseEvent.MOUSE_PRESSED) {
      if (itemListener != null) {
        selected = !selected;
        i++;
        itemListener.itemStateChanged(new ItemEvent(this, ItemEvent.ITEM_STATE_CHANGED,
            getSelectedObjects(), (selected ? ItemEvent.SELECTED : ItemEvent.DESELECTED)));
      }
    }
  }
}
public class MainClass extends Frame implements ItemListener {
  MainClass() {
    super("Listening In");
    ItemEventComponent c = new ItemEventComponent();
    add(c, "Center");
    c.addItemListener(this);
    c.setBackground(SystemColor.control);
    setSize(200, 200);
  }
  public void itemStateChanged(ItemEvent e) {
    Object[] o = e.getItemSelectable().getSelectedObjects();
    Integer i = (Integer) o[0];
    System.out.println(i);
  }
  public static void main(String args[]) {
    MainClass f = new MainClass();
    f.show();
  }
}

Component: getAccessibleContext()

  
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.accessibility.AccessibleContext;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainClass extends JFrame implements ActionListener {
  JButton jb;
  MainClass(String title) {
    super(title);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    AccessibleContext ac = getAccessibleContext();
    ac.setAccessibleDescription("Accessibility Demo1 description.");
    ac = getRootPane().getAccessibleContext();
    ac.setAccessibleName("Root pane");
    ac.setAccessibleDescription("Root pane description");
    ac = getGlassPane().getAccessibleContext();
    ac.setAccessibleName("Glass pane");
    ac.setAccessibleDescription("Glass pane description");
    ac = getLayeredPane().getAccessibleContext();
    ac.setAccessibleName("Layered pane");
    ac.setAccessibleDescription("Layered pane description");
    ac = getContentPane().getAccessibleContext();
    ac.setAccessibleName("Content pane");
    ac.setAccessibleDescription("Content pane description");
    JPanel p = new JPanel();
    ac = p.getAccessibleContext();
    ac.setAccessibleName("Panel");
    ac.setAccessibleDescription("Panel description");
    jb = new JButton("Press Me");
    jb.addActionListener(this);
    jb.setToolTipText("Press me for accessibility information.");
    p.add(jb);
    getContentPane().add(p);
    setSize(200, 75);
    setVisible(true);
  }
  public void actionPerformed(ActionEvent e) {
    dumpInfo(getAccessibleContext());
  }
  void dumpInfo(AccessibleContext ac) {
    System.out.println("Name = " + ac.getAccessibleName());
    System.out.println("Description = " + ac.getAccessibleDescription());
    int nChildren = ac.getAccessibleChildrenCount();
    for (int i = 0; i < nChildren; i++)
      dumpInfo(ac.getAccessibleChild(i).getAccessibleContext());
  }
  public static void main(String[] args) {
    new MainClass("Accessibility Demo1");
  }
}

Component: getLocationOnScreen()

  

import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Main extends JPanel {
  public void paintComponent(Graphics g) {
    g.setColor(Color.black);
    g.fillRect(0, 0, getWidth(), getHeight());
  }
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.setPreferredSize(new Dimension(300, 280));
    Main ch = new Main();
    frame.getContentPane().add(ch);
    frame.setUndecorated(true);
    MoveMouseListener mml = new MoveMouseListener(ch);
    ch.addMouseListener(mml);
    ch.addMouseMotionListener(mml);
    frame.pack();
    frame.setVisible(true);
  }
}
class MoveMouseListener implements MouseListener, MouseMotionListener {
  JComponent target;
  Point start_drag;
  Point start_loc;
  public MoveMouseListener(JComponent target) {
    this.target = target;
  }
  public static JFrame getFrame(Container target) {
    if (target instanceof JFrame) {
      return (JFrame) target;
    }
    return getFrame(target.getParent());
  }
  Point getScreenLocation(MouseEvent e) {
    Point cursor = e.getPoint();
    Point target_location = this.target.getLocationOnScreen();
    return new Point((int) (target_location.getX() + cursor.getX()),
        (int) (target_location.getY() + cursor.getY()));
  }
  public void mouseClicked(MouseEvent e) {
  }
  public void mouseEntered(MouseEvent e) {
  }
  public void mouseExited(MouseEvent e) {
  }
  public void mousePressed(MouseEvent e) {
    this.start_drag = this.getScreenLocation(e);
    this.start_loc = this.getFrame(this.target).getLocation();
  }
  public void mouseReleased(MouseEvent e) {
  }
  public void mouseDragged(MouseEvent e) {
    Point current = this.getScreenLocation(e);
    Point offset = new Point((int) current.getX() - (int) start_drag.getX(),
        (int) current.getY() - (int) start_drag.getY());
    JFrame frame = this.getFrame(target);
    Point new_location = new Point(
        (int) (this.start_loc.getX() + offset.getX()), (int) (this.start_loc
            .getY() + offset.getY()));
    frame.setLocation(new_location);
  }
  public void mouseMoved(MouseEvent e) {
  }
}

Component: isFocusable()

  
import java.awt.AWTKeyStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.KeyboardFocusManager;
import java.awt.event.KeyEvent;
import javax.swing.JButton;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JPanel;
public class MainClass extends JFrame {
  public MainClass() {
    super("Focus Example");
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    MyPanel mypanel = new MyPanel();
    JButton button1 = new JButton("One");
    JButton button2 = new JButton("Two");
    JButton button3 = new JButton("Three");
    JButton button4 = new JButton("Four");
    JButton button5 = new MyButton("Five*");
    JButton button6 = new MyButton("Six*");
    JButton button7 = new JButton("Seven");
    mypanel.add(button2);
    mypanel.add(button3);
    JInternalFrame frame1 = new JInternalFrame("Internal Frame 1", true, true, true, true);
    frame1.setBackground(Color.lightGray);
    frame1.getContentPane().setLayout(new GridLayout(2, 3));
    frame1.setSize(300, 200);
    frame1.getContentPane().add(button1);
    frame1.getContentPane().add(mypanel);
    frame1.getContentPane().add(button4);
    frame1.getContentPane().add(button5);
    frame1.getContentPane().add(button6);
    frame1.getContentPane().add(button7);
    JDesktopPane desktop = new JDesktopPane();
    desktop.add(frame1, new Integer(1));
    desktop.setOpaque(true);
    // Now set up the user interface window.
    Container contentPane = getContentPane();
    contentPane.add(desktop, BorderLayout.CENTER);
    setSize(new Dimension(400, 300));
    frame1.setVisible(true);
    setVisible(true);
  }
  public static void main(String[] args) {
    new MainClass();
  }
}
class MyButton extends JButton {
  public MyButton(String s) {
    super(s);
  }
  public boolean isFocusable() {
    return false;
  }
}
class MyPanel extends JPanel {
  public MyPanel() {
    super(true);
    java.util.Set upKeys = new java.util.HashSet(1);
    upKeys.add(AWTKeyStroke.getAWTKeyStroke(KeyEvent.VK_UP, 0));
    setFocusTraversalKeys(KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, upKeys);
  }
  public boolean isFocusCycleRoot() {
    return true;
  }
}

Component: isFocusCycleRoot

  
import java.awt.AWTKeyStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.KeyboardFocusManager;
import java.awt.event.KeyEvent;
import javax.swing.JButton;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JPanel;
public class MainClass extends JFrame {
  public MainClass() {
    super("Focus Example");
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    MyPanel mypanel = new MyPanel();
    JButton button1 = new JButton("One");
    JButton button2 = new JButton("Two");
    JButton button3 = new JButton("Three");
    JButton button4 = new JButton("Four");
    JButton button5 = new MyButton("Five*");
    JButton button6 = new MyButton("Six*");
    JButton button7 = new JButton("Seven");
    mypanel.add(button2);
    mypanel.add(button3);
    JInternalFrame frame1 = new JInternalFrame("Internal Frame 1", true, true, true, true);
    frame1.setBackground(Color.lightGray);
    frame1.getContentPane().setLayout(new GridLayout(2, 3));
    frame1.setSize(300, 200);
    frame1.getContentPane().add(button1);
    frame1.getContentPane().add(mypanel);
    frame1.getContentPane().add(button4);
    frame1.getContentPane().add(button5);
    frame1.getContentPane().add(button6);
    frame1.getContentPane().add(button7);
    JDesktopPane desktop = new JDesktopPane();
    desktop.add(frame1, new Integer(1));
    desktop.setOpaque(true);
    // Now set up the user interface window.
    Container contentPane = getContentPane();
    contentPane.add(desktop, BorderLayout.CENTER);
    setSize(new Dimension(400, 300));
    frame1.setVisible(true);
    setVisible(true);
  }
  public static void main(String[] args) {
    new MainClass();
  }
}
class MyButton extends JButton {
  public MyButton(String s) {
    super(s);
  }
  public boolean isFocusable() {
    return false;
  }
}
class MyPanel extends JPanel {
  public MyPanel() {
    super(true);
    java.util.Set upKeys = new java.util.HashSet(1);
    upKeys.add(AWTKeyStroke.getAWTKeyStroke(KeyEvent.VK_UP, 0));
    setFocusTraversalKeys(KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, upKeys);
  }
  public boolean isFocusCycleRoot() {
    return true;
  }
}

Component.LEFT_ALIGNMENT

  
import java.awt.BorderLayout;
import java.awt.ruponent;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainClass {
  public static void main(String[] a) {
    JFrame frame = new JFrame("Alignment Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    String labels[] = { "--", "----", "--------", "------------" };
    JPanel container = new JPanel();
    BoxLayout layout = new BoxLayout(container, BoxLayout.Y_AXIS);
    container.setLayout(layout);
    for (int i = 0; i < labels.length; i++) {
      JButton button = new JButton(labels[i]);
      button.setAlignmentX(Component.LEFT_ALIGNMENT);
      container.add(button);
    }
    frame.add(container, BorderLayout.CENTER);
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}

Component: requestFocusInWindow()

  
import java.awt.ruponent;
import java.awt.GridLayout;
import java.awt.KeyboardFocusManager;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JButton;
import javax.swing.JFrame;
public class MainClass {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Focus Sample");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    ActionListener actionListener = new ActionFocusMover();
    MouseListener mouseListener = new MouseEnterFocusMover();
    frame.setLayout(new GridLayout(3, 3));
    for (int i = 1; i < 10; i++) {
      JButton button = new JButton(Integer.toString(i));
      button.addActionListener(actionListener);
      button.addMouseListener(mouseListener);
      if ((i % 2) != 0) {
        button.setFocusable(false);
      }
      frame.add(button);
    }
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}
class ActionFocusMover implements ActionListener {
  public void actionPerformed(ActionEvent actionEvent) {
    KeyboardFocusManager manager = KeyboardFocusManager
        .getCurrentKeyboardFocusManager();
    manager.focusNextComponent();
  }
}
class MouseEnterFocusMover extends MouseAdapter {
  public void mouseEntered(MouseEvent mouseEvent) {
    Component component = mouseEvent.getComponent();
    if (!component.hasFocus()) {
      component.requestFocusInWindow();
    }
  }
}

Component.RIGHT_ALIGNMENT

  
import java.awt.BorderLayout;
import java.awt.ruponent;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainClass {
  public static void main(String[] a) {
    JFrame frame = new JFrame("Alignment Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    String labels[] = { "--", "----", "--------", "------------" };
    JPanel container = new JPanel();
    BoxLayout layout = new BoxLayout(container, BoxLayout.Y_AXIS);
    container.setLayout(layout);
    for (int i = 0; i < labels.length; i++) {
      JButton button = new JButton(labels[i]);
      button.setAlignmentX(Component.RIGHT_ALIGNMENT);
      container.add(button);
    }
    frame.add(container, BorderLayout.CENTER);
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}

Component: setBounds(int x,int y,int width,int height)

  
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
public class MainClass extends JPanel {
  public MainClass() {
    JRadioButton radMarriedYes = new JRadioButton("Yes?", true);
    JRadioButton radMarriedNo = new JRadioButton("No?", false);
    JRadioButton radGolfYes = new JRadioButton("Yes?", false);
    JRadioButton radGolfNo = new JRadioButton("No?", true);
    ButtonGroup radioGroup1 = new ButtonGroup();
    ButtonGroup radioGroup2 = new ButtonGroup();
    setLayout(null);
    add(radMarriedYes);
    add(radMarriedNo);
    add(radGolfYes);
    add(radGolfNo);
    radioGroup1.add(radMarriedYes);
    radioGroup1.add(radMarriedNo);
    radioGroup2.add(radGolfYes);
    radioGroup2.add(radGolfNo);
    radMarriedYes.setBounds(30, 50, 50, 20);
    radMarriedNo.setBounds(30, 80, 50, 20);
    radGolfYes.setBounds(150, 50, 50, 20);
    radGolfNo.setBounds(150, 80, 50, 20);
  }
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.getContentPane().add(new MainClass());
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(200, 200);
    frame.setVisible(true);
  }
}

Component: setComponentOrientation(ComponentOrientation o)

  

import java.awt.ruponent;
import java.awt.ruponentOrientation;
import java.awt.Container;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JMenu;
public class Main extends JFrame {
  public Main() {
    JComboBox itemsComboBox = new JComboBox(new String[]{ "A", "L", "M" });
    itemsComboBox.setEditable(true);
    itemsComboBox.setMaximumRowCount(3);
    this.getContentPane().add(itemsComboBox);
    itemsComboBox.setVisible(true);
    applyOrientation(this, ComponentOrientation.RIGHT_TO_LEFT);
    this.validate();
    this.repaint();
  }
  public static void main(String[] args) {
    JFrame frame = new Main();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.pack();
    frame.setVisible(true);
  }
  private void applyOrientation(Component c, ComponentOrientation o) {
    c.setComponentOrientation(o);
    if (c instanceof JMenu) {
      JMenu menu = (JMenu) c;
      int ncomponents = menu.getMenuComponentCount();
      for (int i = 0; i < ncomponents; ++i) {
        applyOrientation(menu.getMenuComponent(i), o);
      }
    } else if (c instanceof Container) {
      Container container = (Container) c;
      int ncomponents = container.getComponentCount();
      for (int i = 0; i < ncomponents; ++i) {
        applyOrientation(container.getComponent(i), o);
      }
    }
  }
}

Component: setLocation(int x, int y)

  

/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.ru/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 * 
 * Java, the Duke mascot, and all variants of Sun"s Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun"s, and James Gosling"s,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
/**
 * Internal Frames Demo
 * 
 * @version $Id: JIFrameDemo.java,v 1.4 2003/07/15 01:46:47 ian Exp $
 */
public class Main {
  /* Main View */
  public static void main(String[] a) {
    final JFrame jf = new JFrame("JIFrameDemo Main Window");
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    screenSize.width -= 42;
    screenSize.height -= 42;
    jf.setSize(screenSize);
    jf.setLocation(20, 20);
    JMenuBar mb = new JMenuBar();
    jf.setJMenuBar(mb);
    JMenu fm = new JMenu("File");
    mb.add(fm);
    JMenuItem mi;
    fm.add(mi = new JMenuItem("Exit"));
    mi.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        System.exit(0);
      }
    });
    JDesktopPane dtp = new JDesktopPane();
    //dtp.setBackground(Color.GREEN);
    jf.setContentPane(dtp);
    JInternalFrame mboxFrame = new JInternalFrame("Mail Reader", true,
        true, true, true);
    JLabel reader = new JLabel("Mail Reader Would Be Here");
    mboxFrame.setContentPane(reader);
    mboxFrame.setSize(400, 300);
    mboxFrame.setLocation(50, 50);
    mboxFrame.setVisible(true);
    dtp.add(mboxFrame);
    JInternalFrame compFrame = new JInternalFrame("Compose Mail", true,
        true, true, true);
    JLabel composer = new JLabel("Mail Compose Would Be Here");
    compFrame.setContentPane(composer);
    compFrame.setSize(300, 200);
    compFrame.setLocation(200, 200);
    compFrame.setVisible(true);
    dtp.add(compFrame);
    JInternalFrame listFrame = new JInternalFrame("Users", true, true,
        true, true);
    JLabel list = new JLabel("List of Users Would Be Here");
    listFrame.setContentPane(list);
    listFrame.setLocation(400, 400);
    listFrame.setSize(500, 200);
    listFrame.setVisible(true);
    dtp.add(listFrame);
    jf.setVisible(true);
    jf.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        jf.setVisible(false);
        jf.dispose();
        System.exit(0);
      }
    });
  }
}

Component: setSize(int width, int height)

  
/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.ru/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 * 
 * Java, the Duke mascot, and all variants of Sun"s Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun"s, and James Gosling"s,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
/**
 * Internal Frames Demo
 * 
 * @version $Id: JIFrameDemo.java,v 1.4 2003/07/15 01:46:47 ian Exp $
 */
public class Main {
  /* Main View */
  public static void main(String[] a) {
    final JFrame jf = new JFrame("JIFrameDemo Main Window");
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    screenSize.width -= 42;
    screenSize.height -= 42;
    jf.setSize(screenSize);
    jf.setLocation(20, 20);
    JMenuBar mb = new JMenuBar();
    jf.setJMenuBar(mb);
    JMenu fm = new JMenu("File");
    mb.add(fm);
    JMenuItem mi;
    fm.add(mi = new JMenuItem("Exit"));
    mi.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        System.exit(0);
      }
    });
    JDesktopPane dtp = new JDesktopPane();
    //dtp.setBackground(Color.GREEN);
    jf.setContentPane(dtp);
    JInternalFrame mboxFrame = new JInternalFrame("Mail Reader", true,
        true, true, true);
    JLabel reader = new JLabel("Mail Reader Would Be Here");
    mboxFrame.setContentPane(reader);
    mboxFrame.setSize(400, 300);
    mboxFrame.setLocation(50, 50);
    mboxFrame.setVisible(true);
    dtp.add(mboxFrame);
    JInternalFrame compFrame = new JInternalFrame("Compose Mail", true,
        true, true, true);
    JLabel composer = new JLabel("Mail Compose Would Be Here");
    compFrame.setContentPane(composer);
    compFrame.setSize(300, 200);
    compFrame.setLocation(200, 200);
    compFrame.setVisible(true);
    dtp.add(compFrame);
    JInternalFrame listFrame = new JInternalFrame("Users", true, true,
        true, true);
    JLabel list = new JLabel("List of Users Would Be Here");
    listFrame.setContentPane(list);
    listFrame.setLocation(400, 400);
    listFrame.setSize(500, 200);
    listFrame.setVisible(true);
    dtp.add(listFrame);
    jf.setVisible(true);
    jf.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        jf.setVisible(false);
        jf.dispose();
        System.exit(0);
      }
    });
  }
}

Component.TOP_ALIGNMENT

  
import java.awt.BorderLayout;
import java.awt.ruponent;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainClass {
  public static void main(String[] a) {
    JFrame frame = new JFrame("Alignment Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    String labels[] = { "--", "----", "--------", "------------" };
    JPanel container = new JPanel();
    BoxLayout layout = new BoxLayout(container, BoxLayout.X_AXIS);
    container.setLayout(layout);
    for (int i = 0; i < labels.length; i++) {
      JButton button = new JButton(labels[i]);
      button.setAlignmentX(Component.TOP_ALIGNMENT);
      container.add(button);
    }
    frame.add(container, BorderLayout.CENTER);
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}

Java by API/java.awt/Component

Содержание

Component.BOTTOM_ALIGNMENT

Component.CENTER_ALIGNMENT

Component: enableEvents(long eventsToEnable)

Component: getAccessibleContext()

Component: getLocationOnScreen()

Component: isFocusable()

Component: isFocusCycleRoot

Component.LEFT_ALIGNMENT

Component: requestFocusInWindow()

Component.RIGHT_ALIGNMENT

Component: setBounds(int x,int y,int width,int height)

Component: setComponentOrientation(ComponentOrientation o)

Component: setLocation(int x, int y)

Component: setSize(int width, int height)

Component.TOP_ALIGNMENT

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