Selection sort (Java implementation)

Test.java

class SelectionSort{
    public void selectionSort(int[] arr, int n){
        int min_index;
        for(int i = 0; i < n-1; i++){
            min_index = i;
            for(int j = 1+i; j < n; j++){
                if(arr[j] < arr[min_index]){
                    min_index = j;
                }
            }
            int temp = arr[i];
            arr[i] = arr[min_index];
            arr[min_index] = temp;
        }
    }
}

public class Test{
    public static void main(String[] args){
        SelectionSort ob = new SelectionSort();
        int[] arr = {5, 2, 3, 4, 1};
        int n = arr.length;
        ob.selectionSort(arr, n);
        System.out.println("After sorting");
        for(int i = 0; i < n; i++){
            System.out.print(arr[i] + " ");
        }
        System.out.println();
    }
}