Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import java.util.*;

public class Main {
    public static boolean hasUniqueObject(Collection collection) {
        if (isEmpty(collection)) {
            return false;
        } else {
            boolean hasCandidate = false;
            Object candidate = null;
            Iterator it = collection.iterator();

            while (it.hasNext()) {
                Object elem = it.next();
                if (!hasCandidate) {
                    hasCandidate = true;
                    candidate = elem;
                } else if (candidate != elem) {
                    return false;
                }
            }

            return true;
        }
    }

    public static boolean isEmpty(Collection collection) {
        return collection == null || collection.isEmpty();
    }

    public static boolean isEmpty(Map map) {
        return map == null || map.isEmpty();
    }
}