Program: How to find or search array elements by binary search?

Java Arrays class provides few utility methods. One of the utility method Arrays.binarySearch() helps us to find an object from an array of objects by using binary search algo. Below example shows how to search an objcet using binary search.

package com.java2novice.arrays;

import java.util.Arrays;

public class BinarySearchOnCharArray {

	public static void main(String a[]){
		char[] chrArr = {'a','c','d','y','e','q','b'};
		int index = Arrays.binarySearch(chrArr, 0, chrArr.length-1, 'q');
		System.out.println("Char 'q' index is: "+index);
	}
}

Char 'q' index is: 5