Java Arrays Class: Methods for Efficient Array Manipulation

Explore the Java Arrays class, which provides powerful methods for sorting, searching, and manipulating arrays. Learn key points about the Arrays class, including its ability to handle various array operations and how it handles null references by throwing NullPointerException.

Introduction

The Java Arrays class provides methods for manipulating arrays, such as sorting and searching.

Key Points about Arrays Class

• This class contains various methods for manipulating arrays.
• Methods in this class throw a NullPointerException if the specified array reference is null.

Arrays Class Declaration

public class Arrays
extends Object

Arrays Class Methods

Example of Using Arrays Class

// Importing the Arrays class
import java.util.Arrays;

// Public Main Class
public class Main {
public static void main(String[] args) {
// Declaring an array
int arr[] = {8, 5, 3, 10, 2, 1, 15, 20};

// Sorting the array
Arrays.sort(arr);

// Taking an element to search
int ele = 15;

// Using binarySearch() method to search "ele"
System.out.println(
ele + " presents at the index = " +
Arrays.binarySearch(arr, ele));
}
}

Output of Example

15 presents at the index = 6