java 创建线程

public class ThreadTest extends Thread {

    public void run()
    {
        //System.out.println(this.getName());
        System.out.println("water");
    }
    
    
    public static void main(String[] args)
    {
        System.out.println(Thread.currentThread().getName());    
        ThreadTest thr1=new ThreadTest();
        ThreadTest thr2=new ThreadTest();
        thr1.start();
        thr2.start();
    }
}