java sleep in code

package com.journaldev.threads;

public class ThreadSleep {

    public static void main(String[] args) throws InterruptedException {
        long start = System.currentTimeMillis();
        Thread.sleep(2000);
        System.out.println("Sleep time in ms = "+(System.currentTimeMillis()-start));
        
    }

}

import java.util.concurrent.TimeUnit

TimeUnit.SECONDS.sleep(1);
or
TimeUnit.MINUTES.sleep(1);

Thread.sleep(2000);