Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
// Licensed under the Apache License, Version 2.0 (the "License");

import java.util.HashSet;

import java.util.Set;

public class Main {
    /**
     * Returns the set of all elements in the given collection that appear more than once.
     * @param input some collection.
     * @return the set of repeated elements.  May return an empty set, but never null.
     */
    public static <T> Set<T> duplicatedElementsOf(Iterable<T> input) {
        Set<T> duplicates = new HashSet<>();
        Set<T> elementSet = new HashSet<>();
        for (T el : input) {
            if (!elementSet.add(el)) {
                duplicates.add(el);
            }
        }
        return duplicates;
    }
}