Built-in Searching Methods in Java

Rumman Ansari   Software Engineer   2025-12-27 05:28:50   70  Share
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Table of Content:

Java provides built-in searching using the Arrays class.

Arrays.binarySearch() Method:


import java.util.Arrays;

class BuiltInSearch {
    public static void main(String[] args) {
        int[] arr = {10, 20, 30, 40, 50};
        int index = Arrays.binarySearch(arr, 30);
        System.out.println(index);
    }
}

Important Points:

  • Array must be sorted

  • Returns index if found

  • Returns negative value if not found

Common Mistakes in Array Searching

  • Using binary search on unsorted array

  • Wrong loop conditions

  • Off-by-one index errors

  • Forgetting to stop loop after finding element

Avoiding these mistakes helps write bug-free code.



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