import java.util.Timer;import java.util.TimerTask;import java.util.concurrent.ConcurrentHashMap;public class ConcurrentHashMapTest {		private static ConcurrentHashMap
     
       timerMap = new ConcurrentHashMap
      
       ();		public static void main(String[] args) {		 for(int i=0;i<100;i++){	        	new Thread(new Runnable() {					@Override					public void run() {						// TODO Auto-generated method stub						addTimerTask("1",new TimerTask() {							@Override							public void run() {								// TODO Auto-generated method stub								System.out.println(Thread.currentThread().getName()+"===="+timerMap.size());							}						}, 1000, 1000);					}				}).start();;	        }	}			public static void addTimerTask(String ObjectKey,TimerTask timerTask,long delay, long period){		if(!timerMap.containsKey(ObjectKey)){			Timer timer = new Timer();  			Timer timerOld = timerMap.putIfAbsent(ObjectKey, timer);			if(timerOld==null){				System.out.println("我被初始化了>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");				timer.schedule(timerTask, delay,period);			}		}	}}
      
     

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