/*
Performing Binary Search on Java byte Array Example
This java example shows how to perform binary search for an element of java byte array
using Arrays class.
*/
import java.util.Arrays;
public class BinarySearchByteArrayExample {
public static void main(String[] args) {
//create byte array
byte bArray[] = {1,2,4,5};
/*
To perform binary search on byte array use
int binarySearch(byte[] b, byte value) of Arrays class. This method searches
the byte array for specified byte value using binary search algorithm.
Please note that the byte array MUST BE SORTED before it can be searched
using binarySearch method.
This method returns the index of the value to be searched, if found in the
array.
Otherwise it returns (- (X) - 1)
where X is the index where the the search value would be inserted.
i.e. index of first element that is grater than the search value or array.length,
if all elements of an array are less than the search value.
*/
//sort byte array using Arrays.sort method
Arrays.sort(bArray);
//value to search
byte searchValue = 2;
//since 2 is present in byte array, index of it would be returned
int intResult = Arrays.binarySearch(bArray,searchValue);
System.out.println("Result of binary search of 2 is : " + intResult);
//lets search something which is not in byte array !
searchValue = 3;
intResult = Arrays.binarySearch(bArray,searchValue);
System.out.println("Result of binary search of 3 is : " + intResult);
}
}
/*
Output would be
Result of binary search of 2 is : 1
Result of binary search of 3 is : -3
*/
