Java 多執行緒的一點小問題

    class XXRunnable implements java.lang.Runnable{
        @Override
        public void run() {
            Log.d(TAG,"runnable threadId"+ Thread.currentThread().getId());
        }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.d(TAG,"main threadId"+ Thread.currentThread().getId());
        new Thread(new XXRunnable()).run();
    }

 

這個時候
11-30 11:46:49.449 10738-10738/? D/MainActivity: main threadId1
11-30 11:46:49.449 10738-10738/? D/MainActivity: runnable threadId1
有沒有發現同一個執行緒ID呀！？
採用同一套測試框架

        new XXRunnable().run();  //和呼叫的執行緒同一個執行緒
        new Thread(new XXRunnable()).start(); //這才是多執行緒呢！？