usearithmetic.java

有大量的java的实例

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

public class UseArithmetic extends Applet implements ActionListener
{
	Label prompt;
	TextField input1,input2;
	Button btn;
		int a=0,b=1;

		public void init()
		{
			prompt = new Label("请输入两个整型数据：");
			input1 = new TextField(5);
			input2 = new TextField(5);
			btn = new Button("计算");
			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);
		}
		public void actionPerformed(ActionEvent e)
		{
			a = Integer.parseInt(input1.getText());
			b = Integer.parseInt(input2.getText());
			repaint();
		}
}