e5_5.java

java 初学者学习实例

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class E5_5 extends Applet implements TextListener{
	TextArea text1,text2;TextField text3;
	public void init()
	{ 
	  text1 = new TextArea("",10,10);
	  text2 = new TextArea("",10,10);
	  text3 = new TextField(10);
	  add(text1);add(text2);add(text3);
	  text1.addTextListener(this);
	}
	public void textValueChanged(TextEvent e)
	{
		if (e.getSource() == text1)
		{
			 text2.setText(text1.getText());
			 text3.setText("我开始改变内容");
		}
	}
}