java ----Applet两位整数运算（书上的案例 觉的挺好 发上来和大家分享一下）

import java.applet.Applet;
import java.awt.Button;
import java.awt.Graphics;
import java.awt.Label;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class AppletInOut extends Applet implements ActionListener {
Label prompt;
TextField input1,input2;
Button btn;
int a=0 , b=1;
public void init() {
prompt = new Label("输入两个整型数据：");
input1 = new TextField(5);
input2 = new TextField(5);
btn = new Button("运算");
add(prompt);
add(input1);
add(input2);
add(btn);
btn.addActionListener(this);
}

public void paint(Graphics g){
g.drawString(a+"+"+b+"="+(a+b), 10, 50);
g.drawString(a+"-"+b+"="+(a-b), 10, 70);
g.drawString(a+"*"+b+"="+(a*b), 10, 90);
g.drawString(a+"/"+b+"="+(a/b), 10, 110);
g.drawString(a+"%"+b+"="+(a%b), 10, 130);
}
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
a=Integer.parseInt(input1.getText());
b=Integer.parseInt(input2.getText());
repaint();
}
}