Sleep method in java

The sleep() method of Thread class is used to sleep a thread for the specified amount of time.

Syntax of sleep() method in java

The Thread class provides two methods for sleeping a thread:

• public static void sleep(long miliseconds)throws InterruptedException
• public static void sleep(long miliseconds, int nanos)throws InterruptedException

Example of sleep method in java

1. class TestSleepMethod1 extends Thread{  
2.  public void run(){  
3.   for(int i=1;i<5;i++){  
4.     try{Thread.sleep(500);}catch(InterruptedException e){System.out.println(e);}  
5.     System.out.println(i);  
6.   }  
7.  }  
8.  public static void main(String args[]){  
9.   TestSleepMethod1 t1=new TestSleepMethod1();  
10.   TestSleepMethod1 t2=new TestSleepMethod1();  
11.    
12.   t1.start();  
13.   t2.start();  
14.  }  
15. }  

Output:

       1
       1
       2
       2
       3
       3
       4
       4

As you know well that at a time only one thread is executed. If you sleep a thread for the specified time,the thread shedular picks up another thread and so on.