package four;public class Demo {
public static void main(String[] args) {
Manage manage = new Manage();
manage.show();
}
}
package four;import java.util.Scanner;public class Manage {
/**
* 管理的show方法
*/
public void show(){
System.out.println("\t\t我行我素购物管理系统");
System.out.println("\t\t\t1.登录系统\n");
System.out.println("\t\t\t2.退出");
System.out.println("***************************************************************\n");
Scanner input = new Scanner(System.in);
System.out.print("请选择,输入数字:");
int i= input.nextInt();
switch(i){
case 1:
StartSMS s = new StartSMS();
s.log();
break;
case 2:
return;
default:
break;
}
}
}
package four;import java.util.Scanner;public class StartSMS {
/**
* 用户登录log方法
*/
public void log(){
Scanner input = new Scanner(System.in);
System.out.print("请输入用户名:");
String user = input.next();
System.out.print("请输入密码");
String password = input.next();
while(!user.equals("aa")||!password.equals("11")){
System.out.println("您没有权限进入系统,请重新登录");
Manage manage = new Manage();
manage.show();
break;
}
System.out.println("登陆成功"+user);
}
}
package four;
import java.util.Scanner;
public class StartSMS {
/**
* 用户登录log方法
*/
public void log(){
Scanner input = new Scanner(System.in);
System.out.print("请输入用户名:");
String user = input.next();
System.out.print("请输入密码");
String password = input.next();
while(!user.equals("aa") && !password.equals("11")){
System.out.println("您没有权限进入系统,请重新登录");
System.out.print("请输入用户名:");
String user = input.next();
System.out.print("请输入密码");
String password = input.next();
}
System.out.println("登陆成功"+user);
}
}
package four;
import java.util.Scanner;
public class StartSMS {
/**
* 用户登录log方法
*/
public void log(){
Scanner input = new Scanner(System.in);
System.out.print("请输入用户名:");
String user = input.next();
System.out.print("请输入密码");
String password = input.next();
while(!user.equals("aa") && !password.equals("11")){
System.out.println("您没有权限进入系统,请重新登录");
System.out.print("请输入用户名:");
user = input.next();
System.out.print("请输入密码");
password = input.next();
}
System.out.println("登陆成功"+user);
}
}
while(!user.equals("aa")||!password.equals("11")){
System.out.println("您没有权限进入系统,请重新登录");
Manage manage = new Manage();
manage.show();
break;
}
while 这个循环没必要break。
manage.show(); 你原来的不是显示到登陆界面了吗?
package four;public class Demo {
public static void main(String[] args) {
Manage manage = new Manage();
manage.show();
}
}
package four;import java.util.Scanner;public class Manage {
/**
* 管理的show方法
*/
public void show(){
System.out.println("\t\t我行我素购物管理系统");
System.out.println("\t\t\t1.登录系统\n");
System.out.println("\t\t\t2.退出");
System.out.println("***************************************************************\n");
Scanner input = new Scanner(System.in);
System.out.print("请选择,输入数字:");
int i= input.nextInt();
switch(i){
case 1:
StartSMS s = new StartSMS();
s.log();
break;
case 2:
return;
default:
break;
}
}
}
package four;import java.util.Scanner;public class StartSMS {
/**
* 用户登录log方法
*/
public void log(){
Scanner input = new Scanner(System.in);
System.out.print("请输入用户名:");
String user = input.next();
System.out.print("请输入密码");
String password = input.next();
while(!user.equals("aa")||!password.equals("11")){
System.out.println("您没有权限进入系统,请重新登录");
Manage manage = new Manage();
manage.show();
break;//关键
}
if (user.equals("aa")||password.equals("11")) {
System.out.println("登陆成功"+user);
PrimaryMenu s = new PrimaryMenu();
s.show();
}
}
}
package four;public class PrimaryMenu {
public void show(){
System.out.println("\t\t我行我素购物管理系统");
System.out.println("***************************************************************\n");
System.out.println("\t\t\t1.客户信息管理\n");
System.out.println("\t\t\t2.随便");
}
}
public static void main(String[] args) {
Manage manage = new Manage();
manage.show();
}
}package four;import java.util.Scanner;public class Manage {
/**
* 管理的show方法
*/
public void show(){
System.out.println("\t\t我行我素购物管理系统");
System.out.println("\t\t\t1.登录系统\n");
System.out.println("\t\t\t2.退出");
System.out.println("***************************************************************\n");
Scanner input = new Scanner(System.in);
System.out.print("请选择,输入数字:");
int i= input.nextInt();
switch(i){
case 1:
StartSMS s = new StartSMS();
s.log();
break;
case 2:
return;
default:
break;
}
}
}
package four;import java.util.Scanner;public class StartSMS {
String user;
String password;
/**
* 用户登录log方法
*/
public void log(){
Scanner input = new Scanner(System.in);
System.out.print("请输入用户名:");
user= input.next();
System.out.print("请输入密码");
password = input.next();
if(!user.equals("aa")||!password.equals("11")){
System.out.println("您没有权限进入系统,请重新登录");
Manage manage = new Manage();
manage.show();
}else {
System.out.println("登陆成功"+user);
PrimaryMenu s = new PrimaryMenu();
s.show();
}
}
}
package four;public class PrimaryMenu {
public void show(){
System.out.println("\t\t我行我素购物管理系统");
System.out.println("***************************************************************\n");
System.out.println("\t\t\t1.客户信息管理\n");
System.out.println("\t\t\t2.随便");
}
}