java -Applet两位整数运算（书下的案例 觉的挺好 发下来和大家分享一上）

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）

java Applet的"+" "-" "*" "/" "%"的运算

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();
	}
}

程序运行结果：