How do I Stop/Suspend a Java Thread

If using  methods stop/suspend to stop a thread, this is unsafe and thus deprecated. If a thread being stopped now is modifying common data, that common data remains in an inconsistent state. However, 3 solutions is available as following:

1. let the method run() of the thread finishes itself, it’s best and have no any unsafe factors, for example:

public class OurThread extends Thread(){
   public void run(){
         System.out.println("ok")
   }
}

when the console output the string “OK”, this thread ends safely.

2. use a variable indication, in Thread, iterate this variable and check it, e.g while(flag){}, the indication can be modified outside, if it is modified, thread will be ended.

public class OurThread extends Thread(){
   private volatile boolean stop = false;
   public void run(){
       while (!stop) {
       //Do your actions
       }
   }
}

Set the variable stop to volatile, this make sure all reads and writes will go straight to “main memory”.

3. use interrupt() method and then catch InterruptedException to stop thread.

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