[LeetCode-interview algorithm classic-Java implementation] [217-Contains Duplicate (including Duplicate elements)], leetcode -- java

[LeetCode-interview algorithm classic-Java implementation] [217-Contains Duplicate (including Duplicate elements)], leetcode -- java
[217-Contains Duplicate (including Duplicate elements )][LeetCode-interview algorithm classic-Java implementation] [directory indexes for all questions]Download the Code [https://github.com/wang-jun-chao]Original question

Given an array of integers, find if the array contains any duplicates. your function shoshould return true if any value appears at least twice in the array, and it shoshould return false if every element is distinct.

Theme

Returns an integer array to determine whether the array contains repeated elements. If any number in the array appears at least twice, your function should return true. If each element is unique, false is returned.

Solutions

Use set Data Structure

Code Implementation

Algorithm Implementation class

Import java. util. hashSet; import java. util. set; public class Solution {public boolean containsDuplicate (int [] nums) {// if (nums! = Null & nums. length> 1) {// create a hashSet <Integer> Set = new HashSet <> (nums. length); for (int I: nums) {// returns true if (set. contains (I) {return true;} // Add it to else {set. add (I) ;}}return false ;}}

Evaluation Result

　　Click the image. If you do not release the image, drag it to a position. After the image is released, you can view the complete image in the new window.

Note Please refer to the following link for more information: http://blog.csdn.net/derrantcm/article/details/48046275]

Copyright Disclaimer: This article is an original article by the blogger and cannot be reproduced without the permission of the blogger.