Java -The method sleep(int) is undefined for the type Thread

Question

I'm getting an error: The method sleep(int) is undefined for the type Thread. I thought the sleep method is in the Thread class in Java.

import java.util.Random;

public class Thread implements Runnable {

    String name;
    int time;
    Random r = new Random();

    public Thread(String s){
        name = s;
        time = r.nextInt(999);
    }

    public void run() {
        try{
            System.out.printf("%s is sleeping for %d\n", name, time);
            Thread.sleep(time);
            System.out.printf("%s is done", name);
        } catch(Exception e ) {
        }
    }
}

Answer 1

You implemented your own class called Thread and try to call sleep on it, which fails, cause sleep is undefined in your class. Your class basically shadows java's Thread class.

Call your class differently (ie. MyThread or even better MyRunnable, as noted by owlstead) or call java.lang.Thread.sleep() directly.