Binary Search Array Integer

Binary Search Array Integer

Detail definition of Binary search

Below java program is using binary algorithm to search value which contains array of integer values:

package com.javahonk.binarysearch;

import java.util.Arrays;

/**
 * Search element in array using Binary Search
 * @author Java Honk
 *
 */
public class BinarySearchArrayInteger {

    private final static int NOT_FOUND = -1;

    public static void main(String[] args) {

        int array[] = { 3, 10, 7, 1, 2, 20, 40, 19 };

        Arrays.sort(array);

        int value = binarySearch(array, 19);

        if (value == -1) {
            System.out.println("Search value not found");
        } else {
            System.out.println("Search value position: " + value);
        }

    }

    /**
     * @param number
     * @param searchValue
     * @return
     */
    public static int binarySearch(int number[], int searchValue) {

        int low = 0;
        int high = number.length - 1;
        int mid = (low + high) / 2;

        while (low <= high && number[mid] != searchValue) {

            if (number[mid] < searchValue) {
                low = mid + 1;
            } else {
                high = mid - 1;
            }

            mid = (low + high) / 2;

            if (low > high) {
                mid = NOT_FOUND;
            }

        }
        return mid;

    }

}

Output:

For more details: Please use this link: Binary Search