Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class Main {
    public static void main(String[] args) {
        Integer[] arr = { 1, 2, 3, 1, 4, 4, 1, 5 };
        System.out.println(Arrays.toString(arr));
        List<Integer> l = Arrays.asList(arr);

        System.out.println(l);

        Set<Integer> set = new HashSet<Integer>();
        for (int j = 0; j < l.size(); j++) {
            if (Collections.frequency(l, l.get(j)) > 1) {
                set.add(l.get(j));
            }
        }
        System.out.println("dups are:" + set);
    }
}