How to sort elements in Integer Array using Index in Java?

Declaration :

public static void sort(int[] a, int fromIndex, int toIndex)

1	public static void sort(int[] a, int fromIndex, int toIndex)

Explanation :

Purpose	The java.util.Arrays.sort(int[] a int fromIndex int toIndex) method sorts the specified range of the specified array of ints into ascending numerical order. The range to be sorted extends from index fromIndex inclusive to index toIndex exclusive.
Parameters	a ===> This is the array to be sorted.
	fromIndex ===> This is the index of the first element (inclusive) to be sorted.
	toIndex ===> This is the index of the last element (exclusive) to be sorted .
Return Value	This method does not return any value.
Exception	IllegalArgumentException — if fromIndex > toIndex ,ArrayIndexOutOfBoundsException — if fromIndex < 0 or toIndex > a.length

Java Program : Example

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

package com.c4learn;
import java.util.Arrays;
public class ArrayDemo {
   	public static void main(String[] args) {
		// Initialize unsorted int array
		int arrI[] = { 15, 5, 25, 20, 10 };
		// Print the Unsorted Array List
		System.out.println("The Unsorted Int Array is:");
		for (int num : arrI) {
			System.out.println("Array Element is " + num);
		}
		// Sort the array
		Arrays.sort(arrI, 0, 5);
		// Print the Sorted Array List
		System.out.println("The Sorted Int Array is:");
		for (int num : arrI) {
			System.out.println("Array Element is " + num);
		}
	}
}

package com.c4learn;

import java.util.Arrays;

public class ArrayDemo {

public static void main(String[] args) {

// Initialize unsorted int array

int arrI[] = { 15, 5, 25, 20, 10 };

// Print the Unsorted Array List

System.out.println("The Unsorted Int Array is:");

for (int num : arrI) {

System.out.println("Array Element is " + num);

}

// Sort the array

Arrays.sort(arrI, 0, 5);

// Print the Sorted Array List

System.out.println("The Sorted Int Array is:");

for (int num : arrI) {

System.out.println("Array Element is " + num);

}

Output of Program :

The Unsorted Int Array is:
Array Element is 15
Array Element is 5
Array Element is 25
Array Element is 20
Array Element is 10
The Sorted Int Array is:
Array Element is 5
Array Element is 10
Array Element is 15
Array Element is 20
Array Element is 25

The Unsorted Int Array is:

Array Element is 15

Array Element is 5

Array Element is 25

Array Element is 20

Array Element is 10

The Sorted Int Array is:

Array Element is 5

Array Element is 10

Array Element is 15

Array Element is 20

Array Element is 25

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