mytextarea.java~3~

很好得jbuilder100例源代码

package clipboard;

import java.awt.TextArea;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.ClipboardOwner;

/**
 * Title:
 * Description:
 * Copyright:    Copyright (c) 2001
 * Company:
 * @author
 * @version 1.0
 */

public class MyTextArea extends TextArea implements ClipboardOwner {

  public MyTextArea() {
  }

  Clipboard clipboard = getToolkit().getSystemClipboard();

  void copy() { //copy some text to clipboard
    String srcData = getSelectedText();
    if (srcData != null) {
      StringSelection contents = new StringSelection(srcData);
      clipboard.setContents(contents, this);
    }
  }

  void paste() {  //paste text in the clipboard to the textarea
    Transferable content = clipboard.getContents(this);
    int insertPos = getCaretPosition();//xxx;  // initiates the inserting position
    if (content != null) {
      try {
        String dstData = (String)content.getTransferData(
	DataFlavor.stringFlavor);
	insert(dstData,insertPos);
      } catch (Exception e) {
	  System.out.println("Couldn't get contents in format: "+
	  DataFlavor.stringFlavor.getHumanPresentableName());
	  }
    }
  }

  public void lostOwnership(Clipboard clipboard, Transferable contents) {
    /**@todo: Implement this java.awt.datatransfer.ClipboardOwner method*/
    //throw new java.lang.UnsupportedOperationException("Method lostOwnership() not yet implemented.");
  }
}