public   interface  MyThreadAccessor {
     void  set(String data);
     void  start();
}

 public   class  MyThread  extends  Thread  implements  MyThreadAccessor {
     public  MyThread(String name) {  super (name); }
     void  run() { //your code here }
     void  set(String data) { }
}

Map<String, MyThreadAccessor> pool;

 void  init() {
    //initialization
    MyThreadAccessor thread1 =  new  MyThread("threadName1");
    thread1.start();
    MyThreadAccessor thread2 =  new  MyThread("threadName2");
    thread2.start();
    pool.put(thread1.getName(), thread1);
    pool.put(thread2.getName(), thread2);
}

pool.get("threadName1").set("someData");