usearithmeticapplet.java~21~

是用jbuilder实现的一些原代码程序

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

public class UseArithmeticApplet 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(8);
                input2 = new TextField(8);
                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)
        {
          try{
              a = Integer.parseInt(input1.getText());
              b = Integer.parseInt(input2.getText());
              repaint();
            }catch(Exception e){}
        }

}