Contains Duplicate LeetCode solution in Java

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class Solution {
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  public boolean containsDuplicate(int[] nums) {
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    Arrays.sort(nums);
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    int n = nums.length;
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    for (int i = 1; i < n; i++) {
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      if (nums[i] == nums[i - 1]) return true;
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    }
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    return false;
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  }
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}