package?com;

import?java.io.Serializable;
import?java.sql.*;
import?java.util.*;

interface?RoleManager?{
	public?User?get（Serializable?id）;

	public?void?save（User?user）;
	//?public?void?list（）;
}

class?Role?{
	public?int?r_num;
	public?String?r_name;

	public?Role（int?r_num?String?r_name）?{
		this.r_num?=?r_num;
		this.r_name?=?r_name;
	}

	public?void?setR_num（int?r_num）?{
		this.r_num?=?r_num;
	}

	public?int?getR_num（）?{
		return?r_num;
	}

	public?void?setR_name（String?r_name）?{
		this.r_name?=?r_name;
	}

	public?String?getR_name（）?{
		return?r_name;
	}
}

class?User?{
	public?int?u_num;
	public?String?u_name;
	public?String?u_sex;

	private?Role?_r;

	public?User（int?u_num?String?u_name?String?u_sex?Role?_r）?{
		this.u_num?=?u_nu