www.pudn.com > GuestNum.rar > GuestNum.java

import java.awt.*; 
import java.awt.event.*; 
import javax.swing.*; 
import java.awt.event.ActionListener; 
import java.util.EventListener; 
public class GuestNum extends JFrame implements ActionListener 
{ 
	double tempt; 
	JLabel jl1,jl2,jl3; 
	JTextField jtf; 
	JButton jb1,jb2; 
	JDialog jd; 
	Container con=getContentPane(); 
	public GuestNum(String argu) 
	{ 
		super(argu); 
		tempt=Math.floor(1000*Math.random()); 
		jl1=new JLabel("Could you guest the 1 to 1000?"); 
		jl2=new JLabel("Please enter a number:"); 
		jl3=new JLabel(); 
		jtf=new JTextField(8); 
		jb1=new JButton("Restart!"); 
		jb2=new JButton("Cancel"); 
		jd=new JDialog(this,"Error"); 
		con.add(jl1); 
		con.add(jl2); 
		con.add(jtf); 
		con.add(jl3);	 
		con.add(jb1); 
		con.add(jb2); 
		con.setLayout(new FlowLayout()); 
		jtf.addActionListener(this); 
		jb1.addActionListener(this); 
		jb2.addActionListener(this); 
		this.setSize(300,300); 
		this.setVisible(true);	 
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
	} 
	public static void main(String []args) 
	{ 
		new GuestNum("Guest numbel"); 
	} 
 
	/** 
	 * Method actionPerformed 
	 * 
	 * 
	 * @param e 
	 * 
	 */ 
	public void actionPerformed(ActionEvent e)  
	{ 
		double tempt; 
		try 
		{ 
			tempt=Double.parseDouble(jtf.getText());					 
			if(e.getSource()==jtf) 
			{		 
				if(tempt>this.tempt) 
				{ 
					con.setBackground(Color.red); 
					jl3.setText("Too high!"); 
					jtf.setText(""); 
				} 
				else if(tempt