content: package springbook.user.domain;
  
  public class User {
  	String id;
  	String name;
  	String password;
  	Level level;
  	int login;
  	int recommend;
  	
  	public User() {
  	}
  	
  	public User(String id, String name, String password, Level level,
  			int login, int recommend) {
  		this.id = id;
  		this.name = name;
  		this.password = password;
  		this.level = level;
  		this.login = login;
  		this.recommend = recommend;
  	}
  
  
  	public String getId() {
  		return id;
  	}
  	public void setId(String id) {
  		this.id = id;
  	}
  	public String getName() {
  		return name;
  	}
  	public void setName(String name) {
  		this.name = name;
  	}
  	public String getPassword() {
  		return password;
  	}
  	public void setPassword(String password) {
  		this.password = password;
  	}
  
  	public Level getLevel() {
  		return level;
  	}
  
  	public void setLevel(Level level) {
  		this.level = level;
  	}
  
  	public int getLogin() {
  		return login;
  	}
  
  	public void setLogin(int login) {
  		this.login = login;
  	}
  
  	public int getRecommend() {
  		return recommend;
  	}
  
  	public void setRecommend(int recommend) {
  		this.recommend = recommend;
  	}
  	
  	public void upgradeLevel() {
  		Level nextLevel = this.level.nextLevel();	
  		if (nextLevel == null) { 								
  			throw new IllegalStateException(this.level + "  ׷̵尡 Ұմϴ");
  		}
  		else {
  			this.level = nextLevel;
  		}	
  	}
  }
  