How to use the Arrays.sort() method in Java
The built-in java.util.Arrays class has a method called sort() which can be used to sort an array in-place.
Syntax
If starting_index and ending_index are not specified, the whole array is sorted.
Code
The following code snippet demonstrates how Arrays.sort() can be used to sort an integer array:
import java.util.Arrays;class Program {public static void main( String args[] ) {int [] arr = {5, -2, 23, 7, 87, -42, 509};System.out.println("The original array is: ");for (int num: arr) {System.out.print(num + " ");}Arrays.sort(arr);System.out.println("\nThe sorted array is: ");for (int num: arr) {System.out.print(num + " ");}}}
The code snippet below uses the optional starting and ending indexes to sort the array within the specified bounds only:
import java.util.Arrays;class Program {public static void main( String args[] ) {int [] arr = {5, -2, 23, 7, 87, -42, 509};System.out.println("The original array is: ");for (int num: arr) {System.out.print(num + " ");}Arrays.sort(arr, 3, 6);System.out.println("\nThe sorted array (from position 3 to 6) is: ");for (int num: arr) {System.out.print(num + " ");}}}
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