Java使用sleep方法暂停线程Thread

    public static native void sleep(long millis) throws InterruptedException;

    public static void sleep(long millis, int nanos)
    throws InterruptedException {
        if (millis < 0) {
            throw new IllegalArgumentException("timeout value is negative");
        }

        if (nanos < 0 || nanos > 999999) {
            throw new IllegalArgumentException(
                                "nanosecond timeout value out of range");
        }

        if (nanos >= 500000 || (nanos != 0 && millis == 0)) {
            millis++;
        }

        sleep(millis);
    }

import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class ThreadTest implements Runnable{
    public static void main(String[] args) throws InterruptedException {
        Thread test1 = new Thread(new ThreadTest());
        Thread test2 = new Thread(new ThreadTest());
        test1.start();
        test2.start();
        test1.sleep(5000);
    }

    @Override
    public void run() {
       for (int i = 0; i < 5; i++){
           System.out.println(i);
       }
    }
}

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//此处会暂停5秒
end