graphicsinout.java

来自「半年的java基础联系源码！现在看了破！对于初学java的朋友能帮上忙就用吧」· Java 代码 · 共 33 行

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class GraphicsInOut extends Applet implements ActionListener
{
    Label prompt;
    TextField input1;
    TextField input2;
    public void init()
    {
        prompt = new Label("Enter two number,press enter!");
        input1 = new TextField(3);
        input2 = new TextField(3);
        add(prompt);
        add(input1);
        add(input2);
        input1.addActionListener(this);
        input2.addActionListener(this);
    }
    public void paint(Graphics g)
    {
        int a,b,c;
        a=Integer.parseInt(input1.getText());
        b=Integer.parseInt(input2.getText()); 
        c=a+b;
        g.drawString("the sum is "+c,60,80);
    }
    public void actionPerformed(ActionEvent e)
    {
        if(e.getSource() ==input2)
          repaint();
    } 
}