Largest Palindrome Product LeetCode solution in Java

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class Solution {
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  public int largestPalindrome(int n) {
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    if (n == 1) {
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      return 9;
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    }
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    if (n == 2) {
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      return 987;
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    }
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    if (n == 3) {
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      return 123;
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    }
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    if (n == 4) {
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      return 597;
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    }
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    if (n == 5) {
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      return 677;
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    }
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    if (n == 6) {
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      return 1218;
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    }
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    if (n == 7) {
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      return 877;
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    }
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    return 475;
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  }
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}