Table of Content

How to search element in Object Array using Binary Search in Java?

Declaration :

Explanation :

Purpose The java.util.Arrays.binarySearch(Object[] a Object key) method searches the specified array for the specified object using the binary search algorithm.The array be sorted into ascending order according to the natural ordering of its elements prior to making this call. If it is not sorted the results are undefined.
Parameters a ===> This is the array to be searched.
key ===> This is the value to be searched for.
Return Value This method returns index of the search key if it is contained in the array else it returns (-(insertion point) – 1). The insertion point is the point at which the key would be inserted into the array: the index of the first element greater than the key or a.length if all elements in the array are less than the specified key.
Exception ClassCastException — If the search key is not comparable to the elements of the array.

Java Program : Example

Below example will explain java.util.Arrays.binarySearch() method.

Output of Program :