Java Program to generate random numbers with no duplicates

import java.util.LinkedHashSet;
import java.util.Random;
import java.util.Set;
public class Demo {
	public static void main(final String[] args) throws Exception {
		Random randNum = new Random();
		Set<Integer>set = new LinkedHashSet<Integer>();
		while (set.size() < 5) {
			set.add(randNum.nextInt(5)+1);
		}
		System.out.println("Random numbers with no duplicates = "+set);
	}
}