用無參帶返回值方法,求年齡的最大值？

import java.util.*;
public class count {
public int useful(){
System.out.println("用無參帶返回值方法，"

• "求年齡的最大值？");
  int ages[]={26,61,3,89,128,76,34,99};
  int max=ages[0];
  for (int i = 0; i < ages.length; i++) {
  if(ages[i]>max){
  max=ages[i];
  }
  }
  return max;
  }

  public static void main(String[] args) {
  count doo=new count();
  int max=doo.useful();
  System.out.println(max);
  }

}