class NewThread implements Runnable {
    Thread t;
    NewThread(){
        t = new Thread(this,"My new Thread");
    }
}

class MyClass implements Runnable {
   private final Integer value;

   MyClass() {
      new Thread(this);
      int i = 0;
      value = Integer.valueOf(20 / i);
   }

   @Override
   public void run() {
      System.out.println(value.intValue());
   }
}

class MyClass implements Runnable {
    ...
    MyClass start() {
        new Thread(this);
        return this;
    }
    ...
}

// Then construct like this:
MyClass foo = new MyClass().start();