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This article mainly explains "how to judge whether there is a repetition in the Java array". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to judge whether there is repetition in the Java array".

Given an array of integers, determine whether there are duplicate elements.

If any value appears in the array at least twice, the function returns true. Returns false if each element in the array is different.

Example 1:

Output: true/** * @ param {number []} nums * @ return {boolean} * / var containsDuplicate = function (nums) {let I = 0, leng = nums.length, j for (; I < leng; I +) {for (j = I + 1; j)

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