public class Test {

 public static int j = 0;

 public static void fun(int i){

  System.out.print(" ok "+ j);

  j++;

  i--;

  if(i>=0){

   fun(i);

  }

  else{

   System.out.print(" ok ");

  }

 }

 public static void main(String[] args){

  fun(9); }

 

结果：ok 0 ok 1 ok 2 ok 3 ok 4 ok 5 ok 6 ok 7 ok 8 ok 9 ok