import java.awt.*;
import java.util.*;

public class WorldClock{
	Frame f=new Frame();
	Label l1=new Label();
	Label l2=new Label();	
	Label l3=new Label();	
	Label l4=new Label();	
	Label l5=new Label();	
	Label l6=new Label();	
	
	public WorldClock(){
		f.setLayout(new GridLayout(2,3));
		
		l1.setFont(new Font("Arial",Font.BOLD,30));
		l2.setFont(new Font("Arial",Font.BOLD,30));
		l3.setFont(new Font("Arial",Font.BOLD,30));
		l4.setFont(new Font("Arial",Font.BOLD,20));
		l5.setFont(new Font("Arial",Font.BOLD,20));
		l6.setFont(new Font("Arial",Font.BOLD,20));

		
		l4.setText("北京時(shí)間        ");
		l4.setForeground(Color.red);
		l5.setText("紐約時(shí)間        ");
		l5.setForeground(Color.red);
		l6.setText("巴黎時(shí)間        ");
		l6.setForeground(Color.red);
		f.add(l1);		
		f.add(l2);		
		f.add(l3);		
		f.add(l4);		
		f.add(l5);		
		f.add(l6);
		
		TimeZone t1=TimeZone.getDefault();
		TimeZone t2=TimeZone.getTimeZone("US/Alaska");
		TimeZone t3=TimeZone.getTimeZone("Europe/Paris");
	
        Runner r1=new Runner(t1,l1);
        new Thread(r1).start();
        Runner r2=new Runner(t2,l2);
        new Thread(r2).start();
        Runner r3=new Runner(t3,l3);
        new Thread(r3).start();
        
        f.setLocation(200,200);
		f.pack();
		f.setVisible(true);
	}
	
	public static void main(String[] args){
 		new WorldClock();
 		/*
 		String[] s=TimeZone.getAvailableIDs();
 		for(int i=0;i<s.length;i++){
 			System.out.println (s[i]);
 		}
 		*/
 	}
	
	
}