implementactionlistener.java

来自「模拟电话卡的收费计费」· Java 代码 · 共 20 行

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

public class ImplementActionListener extends Applet implements ActionListener
{
	TextField password = new TextField("我是密码");
	Button btn = new Button("隐藏");
	public void init()
	{
		add(password);
		add(btn);
		btn.addActionListener(this);
	}
	public void actionPerformed(ActionEvent e)
	{
		password.setEchoChar('*');
		password.selectAll();
	}
}