*心得：TimeZone tz1=TimeZone.getTimeZone("Europe/Paris");

*      Calendar cld=Calendar.getInstance(tz);

*      clk.setText(cld.get(Calendar.HOUR_OF_DAY)+":"+cld.get(Calendar.MINUTE)+":"+cld.get(Calendar.SECOND));*/importjava.awt.*;importjava.awt.event.*;importjava.util.*;publicclassWorldClock{

Frame f=newFrame("WorldClock");

Label l1=newLabel();

Label l2=newLabel();

Label l3=newLabel();

Label cl1=newLabel();

Label cl2=newLabel();

Label cl3=newLabel();publicWorldClock(){

l1.setFont(newFont("Arial",Font.BOLD,30));

l2.setFont(newFont("Arial",Font.BOLD,30));

l3.setFont(newFont("Arial",Font.BOLD,30));

cl1.setFont(newFont("Arial",Font.BOLD,30));

cl2.setFont(newFont("Arial",Font.BOLD,30));

cl3.setFont(newFont("Arial",Font.BOLD,30));

cl1.setForeground(Color.red);

cl2.setForeground(Color.red);

cl3.setForeground(Color.red);

f.setLayout(newGridLayout(2,3));

f.add(l1);

f.add(l2);

f.add(l3);

f.add(cl1);

f.add(cl2);

f.add(cl3);

TimeZone tz1=TimeZone.getTimeZone("Europe/Paris");

clock c1=newclock(l1,cl1,tz1);newThread(c1).start();

TimeZone tz2=TimeZone.getTimeZone("Asia/Shanghai");

clock c2=newclock(l2,cl2,tz2);newThread(c2).start();

TimeZone tz3=TimeZone.getTimeZone("Europe/Rome");

clock c3=newclock(l3,cl3,tz3);newThread(c3).start();

f.setLocation(200,200);

f.setVisible(true);

f.pack();

}publicstaticvoidmain(String[] args){newWorldClock();

String[] s=TimeZone.getAvailableIDs();inti=0;while(++i

System.out.println (s[i]);

}

}

}classclockimplementsRunnable{privateLabel l;privateLabel clk;

TimeZone tz;publicclock(Label l,Label clk,TimeZone tz){this.l=l;this.clk=clk;this.tz=tz;

}publicvoidrun(){

l.setText(tz.getID());while(true){

Calendar cld=Calendar.getInstance(tz);

clk.setText(cld.get(Calendar.HOUR_OF_DAY)+":"+cld.get(Calendar.MINUTE)+":"+cld.get(Calendar.SECOND));try{

Thread.sleep(1000);

}catch(Exception e){

e.printStackTrace();

}

}

}

}