//降序
int[] ns2 = { 28, 12, 89, 73, 65,36, 18, 96, 50, 8};
int index2 = 0;
for(int i = ns2.length; i>0;i--){
for(int j = ns2.length -1; j > ns2.length-i ;j--){
index2 += 1;
if(ns2[j] > ns2[j-1]){
int tmp = ns2[j];
ns2[j] = ns2[j-1];
ns2[j-1] = tmp;
}
}
}

System.out.println("args = " + index2);
System.out.println("ns2 = " + Arrays.toString(ns2));