nowtime.java

用java编写的显示系统现在时间的例子 很小

/*
 @author 0313236
 @daniel
 */

import java.util.*;
import java.text.*;
  public static main(String[] args)
{
	 Calendar aCalendar=Calendar.getInstance();
			 Date today=aCalendar.getTime();
			 aCanlendar.add(Calendar.MONTH,1);
		 aCanlendar.add(Calendar.YEAR,1);
    public class NowTime extends Thread {
    GregorianCalendar gg;

     public void run() {
    try {

    do {
         gg = new GregorianCalendar();
         String hour = String.valueOf(gg.get(Calendar.HOUR_OF_DAY));//时
         if(hour.length() == 1)
         hour = "0" + hour;
         String minute = String.valueOf(gg.get(Calendar.MINUTE));//分
         if(minute.length() == 1)
         minute = "0" + minute;
         String second = String.valueOf(gg.get(Calendar.SECOND));//秒
         if(second.length() == 1)
         second = "0" + second;
         for(int i = 0; i < 60; i++){
		 System.out.print((char)8); //print "backspace" to clear previous screen,i should be long enough.
		 }

		 System.out.println("today is :"+longFormat.format(today));
         System.out.print("当前系统时间:........................."+hour+":"+minute+":"+second); //use print(...) instead of println(...)
         Thread.sleep(1000);
         } while(true);
     } catch(Exception e) {
         e.printStackTrace();
       }
    }
   public static void main(String[] args) {
         new NowTime().start();   //启动线程
        }
}