即使我已經按 1 登錄，我如何才能使退出選項不出現（執行 while 循環 Java）

Question

您好，我目前是 Java 新手，我想知道如何使退出選項消失，因為我已經輸入了登錄選項。TL;DR 即使我已經按下 1 進行簽名，退出選項仍然出現in.我還需要幫助制定扣除和工資系統這是我的代碼：

import java.io.*;
public class Security{
public static void main(String[] args)
{
    BufferedReader dataIn=new BufferedReader(new InputStreamReader(System.in));

    int sign=0;
    int hour=0;
    int minute=0;
    int out=0;
    int hour2=0;
    int minute2=0;
    int pre=0;
    int late=0;
    int deduction=0;
    String Str_1;
    String Str_2;
    String Str_3;
    String Str_4;
    String Str_5;
    String Str_6;
    String Str_7;
    try{
        System.out.println("Press 1 to sign in ");
        Str_1=dataIn.readLine();
        sign=Integer.parseInt(Str_1);
        System.out.println("Press 2 to sign out ");
        Str_5=dataIn.readLine();
        sign=Integer.parseInt(Str_5);
        if(late>=3)
        {
            System.out.println("Your Salary has been deducted");
            deduction=pre-50;
        }
        do{
           System.out.println("Everytime you sign in you get a 50$ salary");
            System.out.println("Enter your name: ");
            Str_2=dataIn.readLine();
            System.out.println("Enter Hour: ");
            Str_3=dataIn.readLine();
            hour=Integer.parseInt(Str_3);
            System.out.println("Enter Minute: ");
            Str_4=dataIn.readLine();
            minute=Integer.parseInt(Str_4);
            do{
                System.out.println("Number of lates: "+late);
                late++;
            }while(hour>7||minute>30);
            if(hour<=7&&minute<=30)
            {
                System.out.println("You are on time!");
            }
            else if(hour>7||minute>30)
            {
                System.out.println("You are late!");
            }
            System.out.println("Press 1 to sign in ");
            Str_1=dataIn.readLine();
            sign=Integer.parseInt(Str_1);
            System.out.println("Press 2 to sign out ");
            Str_5=dataIn.readLine();
            sign=Integer.parseInt(Str_5);
            }while(sign==1);
           while(sign==2)
        {
            System.out.println("Enter Your Name: ");
            Str_5=dataIn.readLine();
            System.out.println("Enter Hour: ");
            Str_6=dataIn.readLine();
            hour2=Integer.parseInt(Str_6);
            System.out.println("Enter Minute: ");
            Str_7=dataIn.readLine();
            minute2=Integer.parseInt(Str_7);
            System.out.println("Thank you for working hard!");
            System.out.println("Here's your salary!");
            pre=0+50;
        }
        System.out.println("Press 1 to sign in ");
        Str_1=dataIn.readLine();
        sign=Integer.parseInt(Str_1);
        System.out.println("Press 2 to sign out ");
        Str_5=dataIn.readLine();
        sign=Integer.parseInt(Str_5);

    }
    catch(Exception e)
    {
        System.out.println("Oops you entered something wrong");
    }
}

}

Answer 1

System.out.println("Press 1 to sign in , Press 2 to sign out ");
Str_1=dataIn.readLine();
sign=Integer.parseInt(Str_1);
if(sign==2)
  Str_5=Str_1;//i write here because maybe u need str_5

但是你為什么要使用 str_1,2,3,4,5 ...

sign = Integer.parseInt(in.readLine());