Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.util.LinkedHashSet;

import java.util.Set;

public class Main {

    private static Integer _findDuplicate(int[] array) {
        Set<Integer> seenElements = new LinkedHashSet<>();

        for (int element : array) {
            if (!seenElements.add(element)) {
                return element;
            }
        }

        return null;
    }
}