Linear search in Java.

Following is the required program.

Example

Live Demo

public class Tester {
   public static int linearSearch(int[] arr, int element) {
      for (int i = 0; i < arr.length; i++) {
         if (arr[i] == element) {
            return i;
         }
      }
      return -1;
   }
   public static void main(String a[]) {
      int[] array = { 10, 20, 30, 50, 70, 90 };
      int element = 50;
      int index = linearSearch(array, element);
      if (index != -1) {
         System.out.println(element + " present at index: " +index);
      } else {
         System.out.println(element + " is not present.");
      }
   }
}

Output

50 present at index: 3