校园自习室预定系统——用户登录功能

1、登录系统的功能实现：
调用设置：
public class Xs {
String user_name;
String user_psd;
private int login_flag;
public Xs(String n,String p){
user_name=n;
user_psd=p;
login_flag=0;
}
public void user_login(){
login_flag=1;
}
public int get_login_state(){
return login_flag;
}

}
实现模块：
package xz;

import java.util.Scanner;

public class Dl {
Xs u;

static String user_names[]={"jun","pick","wail","zhang","zeng","yang"};
static String user_psds[]={"000","123","321","999","333","666"};

public static void sys_init(){
	
}

public void syslogin(){
	System.out.println("登录系统...");
	Scanner reader=new Scanner(System.in);
	System.out.println("请输入用户名...");
	String n=reader.next();
	System.out.println("请输入用户密码...");
	String p=reader.next();
	int login_flag=0;
	for(int i=0;i<user_names.length;i++){
		if(n.equals(user_names[i]) && p.equals(user_psds[i])){
			login_flag=1;
		}
	}
	if(login_flag==0){
		System.out.println("用户名/密码错误，登录失败！！！");
	}else{
		
		System.out.println("登录成功！！！");
		u=new Xs(n,p);
		u.user_login();
	}
	
	
}

public static void modifyInfo(){
	System.out.println("修改个人信息...");
}

public static void queryClassroom(){
	System.out.println("查询自习教室...");
}

public static void orderClassroom(){
	System.out.println("预订自习教室...");
}

public static void main(String[] args){
	Dl mainprocess=new Dl();
	Scanner reader=new Scanner(System.in);
	int break_flag=0;
	while(true){
		System.out.println("请输入：1.登录系统  2.修改个人信息  3. 查询自习教室  "
				+ "4. 预定自习教室   0.退出");
		int choice=reader.nextInt();
		switch(choice){
		case 1:
			mainprocess.syslogin();break; 
		case 2:
			modifyInfo();break;
		case 3:
			queryClassroom();break;
		case 4:
			orderClassroom();break;
		case 0:
			break_flag=1;break;
		}
		System.out.println(" ");
		if(break_flag==1)
			break;
		
	}
	System.out.println("退出系统...");
	reader.close();
}

}
其运行结果：

结果运行时，可多次试验。