JAVA单线程和多线程的实现方式

public class SingletonThread {
    @SuppressWarnings("static-access")
    public static void main(String[] args) {
         Thread t =Thread.currentThread();
         t.setName("单例线程");
         System.out.println(t.getName()+" 正在运行");
         for(int i=0;i<2000;i++){
             System.out.println("线程正在休眠："+i);
             try {
                t.sleep(500);
            } catch (InterruptedException e) {
                System.out.println("线程出现错误了！！");
            }
         }
         
    }
}

public class ThreadImpl {
    public static void main(String[] args) {
        Thread t1=new ThreadTest("t1", 200);
        Thread t2=new ThreadTest("t2", 100);
        Thread t3=new ThreadTest("t3", 300);
        t1.start();
        t2.start();
        t3.start();
    }
}
 
class ThreadTest extends Thread{
    private String name;
    private int ms;
    public ThreadTest(String name, int ms) {
         
        this.name = name;
        this.ms = ms;
    }
     
    public void run() {
        try {
            sleep(ms);
        } catch (InterruptedException e) {
        System.out.println("线程运行中断异常");
        }
         
        System.out.println("名字叫"+name+"的线程开始休眠"+ms+"毫秒");
    }
     
}
结果：
名字叫t2的线程开始休眠100毫秒
名字叫t1的线程开始休眠200毫秒
名字叫t3的线程开始休眠300毫秒

public class RunnableImpl {
    public static void main(String[] args) {
        RunnableTest r1=new RunnableTest();
        Thread t=new Thread(r1);
         t.start();
    }
     
}
 
class RunnableTest implements Runnable{
     
    @Override
    public void run() {
        // TODO Auto-generated method stub
         
    }
     
}