Java - BufferedReader

import java.io.*;

class Mem_sub {
 private BufferedReader in;
 private String name;
 private int age;
 
 public Mem_sub(){
 in=new BufferedReader (new InputStreamReader(System.in));
 name="";
 age=0;
 }
 
 public void setname() throws IOException{
  System.out.print("이름=");
  name=in.readLine();
 }
 public void setage()throws IOException{
  System.out.print("나이=");
  age=Integer.parseInt(in.readLine());
 }
 public void disp(){
  System.out.println(name+"님!");
  System.out.println("당신은"+age+"세 이시군요!");
 }
 
}
public class Mem01{

 public static void main(String[] ar)throws IOException{
  Mem_sub mem=new Mem_sub();
  mem.setname();
  mem.setage();
  System.out.println("===================");
  mem.disp();
  }
}