JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Java Thread Sleep

  • It makes current executing thread to sleep specified number of milli seconds. Below example shows sample code for thread sleep.

Thread Sleep Sample Code

Code:
package com.myjava.threads;

import java.util.ArrayList;
import java.util.List;

public class MyThreadSuspend {
    public static void main(String a[]){
        List<ExmpThread> list = new ArrayList<ExmpThread>();
        for(int i=0;i<4;i++){
            ExmpThread et = new ExmpThread(i+10);
            list.add(et);
            et.start();
        }
        for(ExmpThread et:list){
            try {
                et.join();
            } catch (InterruptedException ex) { }
        }
    }
}

class ExmpThread extends Thread{
    private int suspendCount;
    public ExmpThread(int count){
        this.suspendCount = count;
    }
    public void run(){
        for(int i=0;i<50;i++){
            if(i%suspendCount == 0){
                try {
                    System.out.println("Thread Sleep: " + getName());
                    Thread.sleep(500);
                } catch (InterruptedException ex) { }
            }
        }
    }
}

Example Output

Thread Sleep: Thread-0
Thread Sleep: Thread-2
Thread Sleep: Thread-1
Thread Sleep: Thread-3
Thread Sleep: Thread-0
Thread Sleep: Thread-2
Thread Sleep: Thread-1
Thread Sleep: Thread-3
Thread Sleep: Thread-2
Thread Sleep: Thread-0
Thread Sleep: Thread-1
Thread Sleep: Thread-3
Thread Sleep: Thread-0
Thread Sleep: Thread-2
Thread Sleep: Thread-1
Thread Sleep: Thread-3
Thread Sleep: Thread-2
Thread Sleep: Thread-0
Thread Sleep: Thread-1

Other Thread Examples

Knowledge Centre
wait Vs sleep methods
sleep(): It is a static method on Thread class. It makes the current thread into the "Not Runnable" state for specified amount of time. During this time, the thread keeps the lock (monitors) it has acquired.

wait(): It is a method on Object class. It makes the current thread into the "Not Runnable" state. Wait is called on a object, not a thread. Before calling wait() method, the object should be synchronized, means the object should be inside synchronized block. The call to wait() releases the acquired lock.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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