33 import javax.swing.event.InternalFrameEvent;
  34 import javax.swing.event.InternalFrameListener;
  35 import javax.swing.plaf.*;
  36 
  37 import javax.accessibility.*;
  38 
  39 import java.io.ObjectOutputStream;
  40 import java.io.IOException;
  41 import java.lang.StringBuilder;
  42 import java.beans.PropertyChangeListener;
  43 import sun.awt.AppContext;
  44 import sun.swing.SwingUtilities2;
  45 
  46 
  47 /**
  48  * A lightweight object that provides many of the features of
  49  * a native frame, including dragging, closing, becoming an icon,
  50  * resizing, title display, and support for a menu bar.
  51  * For task-oriented documentation and examples of using internal frames,
  52  * see <a
  53  href="http://java.sun.com/docs/books/tutorial/uiswing/components/internalframe.html" target="_top">How to Use Internal Frames</a>,
  54  * a section in <em>The Java Tutorial</em>.
  55  *
  56  * <p>
  57  *
  58  * Generally,
  59  * you add <code>JInternalFrame</code>s to a <code>JDesktopPane</code>. The UI
  60  * delegates the look-and-feel-specific actions to the
  61  * <code>DesktopManager</code>
  62  * object maintained by the <code>JDesktopPane</code>.
  63  * <p>
  64  * The <code>JInternalFrame</code> content pane
  65  * is where you add child components.
  66  * As a conveniance <code>add</code> and its variants, <code>remove</code> and
  67  * <code>setLayout</code> have been overridden to forward to the
  68  * <code>contentPane</code> as necessary. This means you can write:
  69  * <pre>
  70  *       internalFrame.add(child);
  71  * </pre>
  72  * And the child will be added to the contentPane.
  73  * The content pane is actually managed by an instance of

  33 import javax.swing.event.InternalFrameEvent;
  34 import javax.swing.event.InternalFrameListener;
  35 import javax.swing.plaf.*;
  36 
  37 import javax.accessibility.*;
  38 
  39 import java.io.ObjectOutputStream;
  40 import java.io.IOException;
  41 import java.lang.StringBuilder;
  42 import java.beans.PropertyChangeListener;
  43 import sun.awt.AppContext;
  44 import sun.swing.SwingUtilities2;
  45 
  46 
  47 /**
  48  * A lightweight object that provides many of the features of
  49  * a native frame, including dragging, closing, becoming an icon,
  50  * resizing, title display, and support for a menu bar.
  51  * For task-oriented documentation and examples of using internal frames,
  52  * see <a
  53  href="http://docs.oracle.com/javase/tutorial/uiswing/components/internalframe.html" target="_top">How to Use Internal Frames</a>,
  54  * a section in <em>The Java Tutorial</em>.
  55  *
  56  * <p>
  57  *
  58  * Generally,
  59  * you add <code>JInternalFrame</code>s to a <code>JDesktopPane</code>. The UI
  60  * delegates the look-and-feel-specific actions to the
  61  * <code>DesktopManager</code>
  62  * object maintained by the <code>JDesktopPane</code>.
  63  * <p>
  64  * The <code>JInternalFrame</code> content pane
  65  * is where you add child components.
  66  * As a conveniance <code>add</code> and its variants, <code>remove</code> and
  67  * <code>setLayout</code> have been overridden to forward to the
  68  * <code>contentPane</code> as necessary. This means you can write:
  69  * <pre>
  70  *       internalFrame.add(child);
  71  * </pre>
  72  * And the child will be added to the contentPane.
  73  * The content pane is actually managed by an instance of