Name: sdR10048 Date: 01/29/2001


public void
  javax.swing.text.JTextComponent.cut()
  javax.swing.text.JTextComponent.copy()
  javax.swing.text.JTextComponent.paste()

throws unspecified HeadlessException in headless mode.

Javadoc says:
--------------------------------------------------
public void cut()

     Transfers the currently selected range in the associated text
     model to the system clipboard, removing the contents from the
     model. The current selection is reset. Does nothing for null
     selections.
     See Also:
          Toolkit.getSystemClipboard(), Clipboard


public void copy()

     Transfers the currently selected range in the associated text
     model to the system clipboard, leaving the contents in the text
     model. The current selection remains intact. Does nothing for
     null selections.
     See Also:
          Toolkit.getSystemClipboard(), Clipboard


public void paste()

     Transfers the contents of the system clipboard into the
     associated text model. If there is a selection in the associated
     view, it is replaced with the contents of the clipboard. If there
     is no selection, the clipboard contents are inserted in front of
     the current insert position in the associated view. If the
     clipboard is empty, does nothing.
     See Also:
          replaceSelection(java.lang.String), Toolkit.getSystemClipboard(),
          Clipboard

See example:
--------------------------------------------------
[falcon] ~/tmp
% cat Test.java
import javax.accessibility.*;
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.text.*;

public class Test {
    public static void main(String args[]) {
        JTextField c = new JTextField();

        System.out.println("---copy---");
        try {
            c.copy();
        } catch (Exception e) {
            System.out.println(e);
        }

        System.out.println("---cut---");
        try {
            c.cut();
        } catch (Exception e) {
            System.out.println(e);
        }

        System.out.println("---paste---");
        try {
            c.paste();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

[falcon] ~/tmp
% javac Test.java

[falcon] ~/tmp
% j -Djava.awt.headless=true Test
---copy---
java.awt.HeadlessException
---cut---
java.awt.HeadlessException
---paste---
java.awt.HeadlessException
        at sun.awt.HeadlessToolkit.getSystemClipboard(HeadlessToolkit.java:278)
        at javax.swing.TransferHandler$TransferAction.getClipboard(TransferHandler.java:735)
        at javax.swing.TransferHandler$TransferAction.actionPerformed(TransferHandler.java:716)
        at javax.swing.text.JTextComponent.paste(JTextComponent.java:1079)
        at Test.main(Test.java:27)
^C
[falcon] ~/tmp
% java -version
java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b48)
Java HotSpot(TM) Client VM (build 1.4beta-B48, mixed mode)

======================================================================

Name: sdR10048 Date: 01/29/2001


NOTE: the following method has the same problem:
javax.swing.text.JTextComponent.setDragEnabled(boolean)
if input parameter == true
The simple test is:

public class Test {
    public static void main(String args[]) {
        try {
            (new javax.swing.JTextField()).setDragEnabled(true);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

======================================================================