Bubble sort - Java

public class BubbleSort {

    public static int[] bubbleSort(int[] a){
        for (int i = 0; i < a.length - 1; i++) {
            for (int j = 1; j < a.length - i; j++) {
                if(a[j-1] > a[j]){
                    int tmp = a[j-1];                    a[j-1] = a[j];                    a[j] = tmp;                }
            }
            System.out.println(i+1+"iteration:"+ Arrays.toString(a));        }
        return a;    }

    public static void main(String[] args) {
        int[] a = new int[] {4,2,7,1,3,8};        System.out.println(Arrays.toString(bubbleSort(a)));    }
}

o/p:

1iteration:[2, 4, 1, 3, 7, 8]
2iteration:[2, 1, 3, 4, 7, 8]
3iteration:[1, 2, 3, 4, 7, 8]
4iteration:[1, 2, 3, 4, 7, 8]
5iteration:[1, 2, 3, 4, 7, 8]
[1, 2, 3, 4, 7, 8]