March 29th, 2015, Thread Name is odd by increasing 1

public class Fabric extends Thread{

    

    public static void main(String args[]){

        Thread t = new Thread(new Fabric());

        Thread t2 = new Thread(new Fabric());

        Thread t3 = new Thread(new Fabric());

        

        t.start();

        t2.start();

        t3.start();

    }



    public void run(){

        System.out.println(Thread.currentThread().getName() + ": " + i);

    }

}

这段代码的输出为 1，3，5 （无序）

但如果指定线程名则为1，2，3：

public class Fabric extends Thread{

    

    public static void main(String args[]){

        Thread t = new Thread(null, new Fabric(), "1");

        Thread t2 = new Thread(null, new Fabric(), "2");

        Thread t3 = new Thread(null, new Fabric(), "3");

        

        t.start();

        t2.start();

        t3.start();

    }



    public void run(){

        System.out.println(Thread.currentThread().getName() + ": " + i);

    }

}