Java Program to sort array elements in descending order

In this tutorial you will be learning writing java program to sort the given array in descending order.

For example:

Suppose we have an array arr = [2, 1, 4, 2, 5, 8]

output will be [1, 2, 2, 4, 5, 8]

Program 1 : Sort array in descending order using Java

import java.util.*;
public class Main{
    public static void main (String[]args){
        Scanner sc = new Scanner (System.in);
    
        //Taking array size and array element as input
        System.out.println ("Enter the size of array: ");
        int size = sc.nextInt();
        int arr[] = new int[size];
        int i,j,temp;
        for ( i = 0; i < size; i++){
	        System.out.print("Please give value for index " + i + " : ");
	        arr[i] = sc.nextInt();
        }
        
        //logic to sort array in descending order
        for (i = 0; i < size; ++i) 
        {
            for (j = i + 1; j < size; ++j) 
            {
                if (arr[i] < arr[j]) 
                {
                    temp = arr[i];
                    arr[i] = arr[j];
                    arr[j] = temp;
                }
            }
        }
        System.out.println ("Array sorted in descending order is ");
        for (i = 0; i < size; ++i)
            System.out.print(arr[i] + " ");
    }
}

Output

Enter the size of array: 
5
Please give value for index 0 : 3
Please give value for index 1 : 1
Please give value for index 2 : 4
Please give value for index 3 : 2
Please give value for index 4 : 3
Array sorted in ascending order is 
4 3 3 2 1 

Program 2 : Java Program to sort array in descending order

import java.util.*;
public class Main{
    public static void main (String[]args){
        Scanner sc = new Scanner (System.in);
        //Taking array size and array element as input
        System.out.println ("Enter the size of array: ");
        int size = sc.nextInt();
        int arr[] = new int[size];
        int i,j,temp;
        for ( i = 0; i < size; i++){
	        System.out.print("Please give value for index " + i + " : ");
	        arr[i] = sc.nextInt();
        }
        //here first we are sorting the array in ascending order
        Arrays.sort(arr);
        
        //this logic is to reverse Array
        //after reversal, array will become sorted in descending order
        for (i = 0; i < size / 2; i++) {
            temp = arr[i];
            arr[i] = arr[size - i - 1];
            arr[size - i - 1] = temp;
        }
        System.out.println ("Array sorted in descending order is ");
        for (i = 0; i < size; ++i)
            System.out.print(arr[i] + " ");
    }
}

Output

Enter the size of array: 
6
Please give value for index 0 : 4
Please give value for index 1 : 7
Please give value for index 2 : 9
Please give value for index 3 : 3
Please give value for index 4 : 2
Please give value for index 5 : 7
Array sorted in descending order is 
9 7 7 4 3 2