SelectionSort Java Program

public class SelectionSort {
    
    public static void main(String[] args) {
 int[] arr1 = {10,34,2,56,7,67,88,42};
        int[] arr2 = doSelectionSort(arr1);
        
        for(int i:arr2){
            System.out.print(i);
            System.out.print(", ");
        }
    }
    
    private static int[] doSelectionSort(int[] arr1) {
 for(int i=0;i<arr1.length-1;i++){
     int index=i;
     for(int j=i+1;j<arr1.length;j++)
  if(arr1[j]<arr1[index])
      index = j;
     int smallNum = arr1[index];
     arr1[index] = arr1[i];
     arr1[i] = smallNum;
     
 }
 return arr1;
    }

}