textcomponentevent.java

来自「有大量的java的实例」· Java 代码 · 共 29 行

import java.applet.*;
import java.awt.*;
import java.awt.event.*;

public class TextComponentEvent extends Applet  implements TextListener,ActionListener
{
 TextField tf;
 TextArea ta;
 public void init()
 {
  tf = new TextField(45);
  ta = new TextArea(10,45);
  add(tf);
  add(ta);
  tf.addActionListener(this);
  tf.addTextListener(this);
 }
 public void textValueChanged(TextEvent e)
 {
  if(e.getSource()==tf)
    ta.setText(((TextField)e.getSource()).getText());
 }
 public void actionPerformed(ActionEvent e)
 {
  if(e.getSource()==tf)
  ta.setText("");
 }
}