Arrays.binarySearch(Object [] a, int fromIndex, int toIndex, Object key) has the following syntax.
public static int binarySearch(Object [] a, int fromIndex, int toIndex, Object key)
In the following code shows how to use Arrays.binarySearch(Object [] a, int fromIndex, int toIndex, Object key) method.
Binary search needs sorted arrays.
//from www . jav a2 s . c o m import java.util.Arrays; public class Main { public static void main(String[] args) { // initializing sorted array Object arr[] = {1,2,22,69,111,222}; // value to search int searchVal = 22; // entering range of index int retVal = Arrays.binarySearch(arr,2,4,searchVal); System.out.println("The index of element 22 is : " + retVal); } }
The code above generates the following result.