Selection sort didn't sort in descending order

See more:

Java

sorting

Here's is my home work ,I want to know how much compares and exchanges takes place in selection sort.when i declared my array in reverse or in descending order like this

int arr[]={5,4,3,2,1};

it's running fine and count compares and exchanges too but when i try to give 'n' and filled array in reverse order ,It filled it in descending order but it didn't work properly to sort in descending order to count my exchanges although it count compares. Here's is the code

    <pre lang="java"> public class SelectionSort {
        
            /**
             * @param args the command line arguments
             */
            public static void main(String[] args) {
                // TODO code application logic here
        
                Scanner in = new Scanner(System.in);
                int compares=0,exchanges=0,x;
                x=in.nextInt();
                 int []arr= new int [x];
                int n = arr.length;
                 int s=0;
                int min;
                int temp,i,j;
                System.out.print("Filling Array");
                for(i=n-1;i>0;i--)
                {
                    arr[i]=i;
                    System.out.print(" "+arr[i]);
                }
                System.out.println("");
                for(i=0 ; i < n ;i++)
                {
                    min = i ;
        
                    for(j=i+1;j<n ;j++)
                    {
                        compares++;
                        if(arr[min] > arr[j])
                            min=j;
        
                    }
                        if(min!=i)
                    {
                       exchanges++;
                        temp=arr[i];
                        arr[i]=arr[min];
                        arr[min]=temp;
                    }
        
                       System.out.println("Iteration " + ( ++s) );
                         for(int a=0;a<arr.length;a++)
                            System.out.print(" "+arr[a]);
        
                             System.out.println("");
                }
                System.out.println("");
                         System.out.println("Compares -- >> "+compares);
                        System.out.println("Exchanges -->> "+exchanges);
            }
        
        
        }