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Why we should not stop a thread by calling its stop() method?

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Pragya Keshap answered on February 4, 2023 Popularity 3/10 Helpfulness 1/10

answer Why we should not stop a thread by calling its stop() method?

Why we should not stop a thread by calling its stop() method?

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The stop() method in Thread class is a deprecated method. Its use is

not recommended.

When we call stop() method, the thread unlocks all monitors that it

has acquired. If any locked object was in an inconsistent state, this

state gets visible to all other threads.

It can cause unexpected behavior when other threads work on this

inconsistent object.

So calling stop() method to stop a thread is not advisable.

public class ThreadStopTest {
   public static void main(String args[]) throws InterruptedException {
      UserThread userThread = new UserThread();
      Thread thread = new Thread(userThread, "T1");
      thread.start();
      System.out.println(currentThread().getName() + " is stopping user thread");
      userThread.stop();
      Thread.sleep(2000);
      System.out.println(currentThread().getName() + " is finished now");
   }
}
class UserThread implements Runnable {
   private volatile boolean exit = false;
   public void run() {
      while(!exit) {
         System.out.println("The user thread is running");
      }
      System.out.println("The user thread is now stopped");
   }
   public void stop() {
      exit = true;
   }
}

https://www.tutorialspoint.com/how-can-we-stop-a-thread-in-java

Popularity 3/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java

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Contributed on Feb 04 2023

Pragya Keshap

0 Answers Avg Quality 2/10

Why we should not stop a thread by calling its stop() method?

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