userelation.java

有大量的java的实例

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

public class UseRelation 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);
		g.drawString(a + " != " + b + " = " + (a!=b),10,150);
	}
	public void actionPerformed(ActionEvent e)
	{
		a = Integer.parseInt(input1.getText());
		b = Integer.parseInt(input2.getText());
		repaint();
	}
}