?? textareaundodemo.java
字號:
package com.javapatterns.command.swingundo2;
/* TextAreaUndoDemo.java
*
* Illustrates the basic concepts of supporting undo and redo
* by adding this support to an extension of the TextArea class.
*/
import java.util.Hashtable;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.undo.*;
/* App class
*/
public class TextAreaUndoDemo {
// Main entry point
public static void main(String s[]) {
// Create app panel
TextAreaUndoDemoPanel panel = new TextAreaUndoDemoPanel();
// Create a frame for app
JFrame frame = new JFrame("TextAreaUndoDemo");
// Add a window listener for window close events
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) { System.exit(0);}
} );
// Add app panel to content pane
frame.getContentPane().add(panel);
// Set initial frame size and make visible
frame.setSize (300, 200);
frame.setVisible(true);
}
}
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