java - How to stop running threads when the conditions are met? -

i suggestions on how stop threads once conditions met.

here codes:

public class animal implements runnable {     private static boolean winner = false;     private string name;     private int position;     private int speed;     private long restmax;        public animal(string name, int position, int speed, long restmax) {          this.name = name;         this.position = position;         this.speed = speed;         this.restmax = restmax;     }        @override     public void run() {          while (position < 100){             position += speed;             try {                 thread.sleep((long) (0 + (math.random()  * restmax)));             } catch (interruptedexception e) {                  e.printstacktrace();             }           system.out.println(name + " @ position " + position );      }         if (position >= 100){             winner = true;             system.out.println(name + " winner of race!");             thread.interrupted();         }     }  } 

here output 2 animal objects created s in main method:

the threads kept on going when winner declared (homegrown rabbit winner in case). question how stop other threads when conditions met? tried interrupted() method couldn't see differences.

homegrown rabbit @ position 5  homegrown rabbit @ position 10  wild turtle @ position 3  wild turtle @ position 6  homegrown rabbit @ position 15  homegrown rabbit @ position 20  wild turtle @ position 9  wild turtle @ position 12  wild turtle @ position 15  homegrown rabbit @ position 25  wild turtle @ position 18  homegrown rabbit @ position 30  wild turtle @ position 21  homegrown rabbit @ position 35  wild turtle @ position 24  homegrown rabbit @ position 40  wild turtle @ position 27  wild turtle @ position 30  homegrown rabbit @ position 45  homegrown rabbit @ position 50  wild turtle @ position 33  homegrown rabbit @ position 55  wild turtle @ position 36  wild turtle @ position 39  homegrown rabbit @ position 60  wild turtle @ position 42  wild turtle @ position 45  homegrown rabbit @ position 65  wild turtle @ position 48  wild turtle @ position 51  homegrown rabbit @ position 70  homegrown rabbit @ position 75  wild turtle @ position 54  wild turtle @ position 57  wild turtle @ position 60  homegrown rabbit @ position 80  homegrown rabbit @ position 85  wild turtle @ position 63  wild turtle @ position 66  homegrown rabbit @ position 90  wild turtle @ position 69  wild turtle @ position 72  wild turtle @ position 75  homegrown rabbit @ position 95  wild turtle @ position 78  homegrown rabbit @ position 100  homegrown rabbit winner of race!  wild turtle @ position 81  wild turtle @ position 84  wild turtle @ position 87  wild turtle @ position 90  wild turtle @ position 93  wild turtle @ position 96  wild turtle @ position 99  wild turtle @ position 102  wild turtle winner of race! 

you don't need thread primitives stop thread. need exit while loop.

here modified run

public void run()  {     while (winner == false)     {         position += speed;         system.out.println(name + " @ position " + position );          if(position >= 100)         {             winner = true;             system.out.println(name + " winner of race!");             break;         }          try          {             thread.sleep((long) (0 + (math.random()  * restmax)));         }          catch (interruptedexception e)          {             e.printstacktrace();         }     }  }