Java force create new instance for a Runnable on each thread

In following runnable class:

public class MyRunnable implements Runnable {
    public void run(){
       System.out.println("MyRunnable running");
    }
  }

To create multiple threads of this, i have multiple options:

1.

for(int i = 0; i < 3; i++ ){
Thread th = new Thread(new MyRunnable());
th.start();
}

2. MyRunnable mr = new MyRunnable;
      for(int i = 0; i < 3; i++ ){
         Thread th = new Thread(mr);
         th.start();
         }
   

Because i've got some property in MyRunnable that do not want to be shared among multiple threads, how can i force creating a new instance of MyRunnable for everyone that going to use this class, is there a mechanism to force this inside MyRunnable?