public class MyRun implements Runnable {

        int count = 1000;

        @Override

        public void run() {

            while (true) {

                if (count > 0) {

                    Log.e("", Thread.currentThread().getName() + "|" + "running");

                    synchronized (this) {

                        count--;

                        Log.e("", Thread.currentThread().getName() + "|" + count);

                        try {

                            Thread.sleep(10);

                        } catch (InterruptedException e) {

                            e.printStackTrace();

                        }

                    }

                } else {

                    break;

                }

            }

            Log.e("", Thread.currentThread().getName() + "|" + "end");

        }

    }

    MyRun myRun = new MyRun();

    new Thread(myRun, "aaa").start();

    new Thread(myRun, "bbb").start();

    new Thread(myRun, "ccc").start();