public class RunnableDemo implements Runnable {

private Thread thread;

private String threadName;

RunnableDemo(String name) {

threadName = name;

System.out.println("Creating " + threadName);

}

@Override

public void run() {

System.out.println("Running " + threadName);

// try {

// for (int i = 4; i > 0; i--) {

// System.out.println("Thread: " + threadName + ", " + i);

// // 让线程睡眠一会

// Thread.sleep(50);

// }

// } catch (InterruptedException e) {

// // e.printStackTrace();

// System.out.println("Thread " + threadName + " interrupted.");

// }

System.out.println("Thread " + threadName + " exiting.");

}

public void start() {

System.out.println("Starting " + threadName);

if (thread == null) {

thread = new Thread(this, threadName);

thread.start();

}

}

}