方法	用途
static Thread currentThread()	得到当前线程
getName()	返回线程的名称
setName(String name)	将线程的名称设置为由name指定的名称
start( )	调用run( )方法启动线程，开始线程的执行
run( )	存放线程体代码
Thread.sleep(1000)	1秒
TimeUnit.SECONDS.sleep(1);	1秒

public static void main(String[] args) {
        new Thread(()->{
            try {
                TimeUnit.SECONDS.sleep(1);
                System.out.println("thread2");
                //输出线程名
                System.out.println(Thread.currentThread().getName());
                //线程级别1-10
                System.out.println(Thread.currentThread().getPriority());
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }).start();

        //线程级别
        Thread.currentThread().setPriority(Thread.MAX_PRIORITY);
        //线程名称
        Thread.currentThread().setName("超级线程");
        try {
            //Thread.sleep(1000);
            TimeUnit.SECONDS.sleep(1);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
//        new Thread(()->System.out.println("thread")).start();
        System.out.println("hello word");
        //输出线程名
        System.out.println(Thread.currentThread().getName());
        //线程级别
        System.out.println(Thread.currentThread().getPriority());
    }