Built-in Searching Methods in Java

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.