Binary Search Array String

Binary Search Array String

Detail definition of Binary search

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

package com.javahonk.binarysearch;

import java.util.Arrays;

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

    private final static int NOT_FOUND = -1;

    public static void main(String[] args) {

        String array[] = { "Z", "W", "E", "D", "Z", "A", "V", "W" };

        Arrays.sort(array);

        int value = binarySearch(array, "V");

        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(String number[], String searchValue) {

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

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

            if (number[mid].compareTo(searchValue) < 0) {
                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