Java - static메소드 참조

class Exam_02_Sub{
 private String name;
 private double don;

 private static float iyul;  

 static{
  iyul = 0.05f;

 }
 public static void setIyul(float iyul){
  Exam_02_Sub test = new Exam_02_Sub("A",1000.0,0.07f);
  Exam_02_Sub.iyul = iyul;
  test.disp();
 }

 public Exam_02_Sub(String name, double don, float iyul){
  this.name = name;  
  this.don = don;

  Exam_02_Sub.iyul = iyul;
 }

 public void disp(){
  System.out.println("name : " + this.name);
  System.out.println("name : " + this.don);
  System.out.println("name : " + Exam_02_Sub.iyul);
  }

 }

 public class Exam_02{
  public static void main(String[] args){
   Exam_02_Sub es = new Exam_02_Sub("A",1000.0,0.07f);

  es.setIyul(0.03f);
  }

 }