Java Long class

Java Thread suspend() method

Last Updated : 17 Mar 2025

The suspend() method of thread class puts the thread from running to waiting state. This method is used if you want to stop the thread execution and start it again when a certain event occurs. This method allows a thread to temporarily cease execution. The suspended thread can be resumed using the resume() method.

Syntax

Return

This method does not return any value.

Exception

SecurityException: If the current thread cannot modify the thread.

Example

public class JavaSuspendExp extends Thread
{  
    public void run()
    {  
        for(int i=1; i<5; i++)
        {  
            try
            {
                // thread to sleep for 500 milliseconds
                 sleep(500);
                 System.out.println(Thread.currentThread().getName());  
            }catch(InterruptedException e){System.out.println(e);}  
            System.out.println(i);  
        }  
    }  
    public static void main(String args[])
    {  
        // creating three threads 
        JavaSuspendExp t1=new JavaSuspendExp ();  
        JavaSuspendExp t2=new JavaSuspendExp (); 
        JavaSuspendExp t3=new JavaSuspendExp (); 
        // call run() method 
        t1.start();
        t2.start();
        // suspend t2 thread 
        t2.suspend(); 
        // call run() method 
        t3.start();
    }  
}

Output:

Thread-0
1
Thread-2
1
Thread-0
2
Thread-2
2
Thread-0
3
Thread-2
3
Thread-0
4
Thread-2
4

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Java Thread suspend() method

Syntax

Return

Exception