java - Java中一个对象可以创建多个线程吗

Question

我是多线程的新手，在练习时我编写了以下代码。我想每次调用 createThred 方法时都创建一个新线程。但是，使用下面给出的代码，每次调用 createThread 方法时，我都会一次又一次地运行同一个线程。是否可以使用同一个对象创建一个新线程？显然不是，只是想确认是否有我不知道的方法。

public class ThreadStartRunnable implements Runnable {

    private Thread t;
    /*
     ThreadStartRunnable(String name) {
         t = new Thread(this, name);
        t.start();
        }
     */
       private Thread createThread(String name){

         t = new Thread(this,name);
         t.start();
         return t;
     }

    /**
     * @Override run
     * 
     */
    public void run() {

        for(int i=0;i<=5;i++)
        {
            try {
                Thread.sleep(500);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            System.out.println("The current Thread is " + t.getName() + " and thread ID is " + t.getId());
        }
    }
    /**
     * @param args
     * @throws InterruptedException 
     */
    public static void main(String[] args)  {
        // TODO Auto-generated method stub

        Thread t = Thread.currentThread();
        //new ThreadStartRunnable("User 1");
        //new ThreadStartRunnable("User 2");
        //ThreadStartRunnable c = new ThreadStartRunnable();
        ThreadStartRunnable t1 = new ThreadStartRunnable();

        t1.createThread("Child 1");
        t1.createThread("Child 2");

        for(int i=0;i<=5;i++)
        {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            System.out.println("The cirrent Thread is " + t.getName()+ " and thread ID is " + t.getId());
        }




    }

}

OUTPUT:

The current Thread is Child 2 and thread ID is 9

The current Thread is Child 2 and thread ID is 9

The cirrent Thread is main and thread ID is 1

The current Thread is Child 2 and thread ID is 9

The current Thread is Child 2 and thread ID is 9

The current Thread is Child 2 and thread ID is 9

The current Thread is Child 2 and thread ID is 9

The current Thread is Child 2 and thread ID is 9

The current Thread is Child 2 and thread ID is 9

The cirrent Thread is main and thread ID is 1

The current Thread is Child 2 and thread ID is 9

The current Thread is Child 2 and thread ID is 9

The current Thread is Child 2 and thread ID is 9

The current Thread is Child 2 and thread ID is 9

The cirrent Thread is main and thread ID is 1

The cirrent Thread is main and thread ID is 1

The cirrent Thread is main and thread ID is 1

The cirrent Thread is main and thread ID is 1

Answer 1

它总是说 Child 2 的原因是因为您正在打印 Thread t 成员的名称，这是最后创建的线程。

替换:

System.out.println("当前线程为"+ t.getName() + "，线程ID为"+ t.getId());

与

System.out.println("当前线程是"+ Thread.currentThread().getName() + "，线程ID是"+ Thread.currentThread().getId());


否则可以使用相同的可运行对象: Initializing two threads with the same instance of a runnable