removetest.java

200多个自己编的java程序,大家可以学一下.

/*
 * 这个程序主要是想remove控件.java
 *
 * Created on 2004年9月22日, 下午6:44
 */

/**
 *
 * @author  litertiger
 */
import java.awt.event.*;
import java.awt.*;
public class removeTest extends java.applet.Applet implements ActionListener{
    TextField t1,t2,t3;
    Button b1,b2;
    String key;
    int ok=0;
    
    /** Initialization method that will be called after the applet is loaded
     *  into the browser.
     */
    public void init() {
        t1=new TextField("设置密码:",10);
        t1.setEditable(false);
        t2=new TextField(10);
        t2.setEchoChar('*');
        b1=new Button("确定");
        b2=new Button("确定");
        add(t1);
        add(t2);
        add(b1);
        b1.addActionListener(this);
        b2.addActionListener(this);
        add(t3);
        add(b2);
        // TODO start asynchronous download of heavy resources
    }
    
    public void actionPerformed(ActionEvent e) {
        
        if(e.getSource()==b1)
        {
            key=t2.getText();
            removeAll();
            //从小程序中移去所有组件
            t1.setText("请输入你的密码:");
            add(t1);
            add(t3);
            add(b2);
            
            
        }
        else
            if(e.getSource()==b2)
        {
            removeAll();
            if(key.equals(t3.getText()))
            {
                ok=1;
                repaint();
            }
            
        }
    }
    public void paint(Graphics g)
    {
        if(ok==1)
        {
            g.setColor(Color.red);
            g.drawString("我是张同虎", 60, 50);
        }
    }
    
    // TODO overwrite start(), stop() and destroy() methods
}