timing.java

这是我们写的考试系统！！java编写的！！不是很大！！希望有用

import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*; 

import java.text.NumberFormat;


public class Timing extends JLabel{
	int t;
	
	Font font = new Font("宋体",Font.BOLD,30); 

		
	public Timing(int tt)  {
		this.t=tt*60;
		setFont(font);
	
		java.util.Timer _timer=new java.util.Timer();
		
		java.util.TimerTask task=new java.util.TimerTask(){
			
			public void run(){
				
				NumberFormat n=NumberFormat.getInstance();
				n.setMinimumIntegerDigits(2);
					
				int h,m,s;
				String tt;
				t=t-1;
				
				if(t>0){
					
					h=t/3600;
					m=t%3600/60;
					s=t%60;
					setText("离考试结束还有: "+n.format(h)+":"+n.format(m)+":"+n.format(s));
					
				}
				else{
					
					setText("TIME UP!");

				}
			}
				
			    	
				
		};	
		_timer.schedule(task,1000,1000);
			 
		  	
	}
		
		
}