从已经编写的Java代码创建GUI [关闭]

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我有一些无法转换为GUI的代码，我被认为是1）为登录屏幕创建GUI以访问系统； （2）允许用户客户选择酒店及其位置，预订天数，预订日期，房间住宿以及任何适用的折扣； （3）返回预订总费用和用户输入的所有数据的收据。 总成本应反映营业税和任何适用的折扣； （4）允许用户选择付款方式（VISA，MasterCard，Discover Card，PayPal，ApplePay等）； （5）重复申请新订单的能力。 我已经写了大部分代码，但似乎无法弄清楚如何将其转换为GUI。

import java.util.Scanner;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Reservation {
    static Scanner sc = new Scanner(System.in);

    public static void main(String args[]) {

        // the local variables declared and initialized
        char answer = 'Y', specEvent = 'N', rateCode = '\0';
        String char1 = "", char2 = "", choice1 = "";
        int days = 0, Selection = 0, room = 0, cost = 0;
        int num = 0, Status = 0;
        double FinalCost = 0.0, RealPrice = 0.0;
        double discount = 0.0, tax = 0.0;

        System.out.println("Welcome to the North Hotel Reservation System");
        System.out.println("");
        System.out.println("");
        System.out.println("***************************");

        // Request the name of the customer
        System.out.println("Please enter your first name");
        char1 = sc.nextLine();
        System.out.println("Please enter your second name");
        char2 = sc.nextLine();
        System.out.println("Welcome " + char1 + " " + char2 + ".");
        System.out.println("");
        System.out.println("We have 7 hotels available, please select the number tied to the hotel you wish to accomodate");
        System.out.println("");
        System.out.println("Ritz-Carlton    1" + "\n" + "Comfort Inn    2");
        System.out.println("Hyatt    3" + "\n" + "The View Hotel    4");
        System.out.println("Grand Hotel    5" + "\n" + "Plaza Hotel    6" + "\n" + "Royal York Hotel    7");
        System.out.println("");
        Selection = sc.nextInt();

        switch (Selection) {
        case 1:
            System.out.print("Ritz-Carlton in Chicago, IL");
            choice1 = choice1 + ("Ritz-Carlton in Chicago, IL");
            break;
        case 2:
            System.out.print("Comfort Inn in Madison, WI");
            choice1 = choice1 + ("Comfort Inn in Madison, WI");
            break;
        case 3:
            System.out.print("Hyatt in Los Angeles, CA");
            choice1 = choice1 + ("Hyatt in Los Angeles, CA");
            break;
        case 4:
            System.out.print("The View Hotel in Sussex, UK");
            choice1 = choice1 + ("The View Hotel in Sussex, UK");
            break;
        case 5:
            System.out.print("Grand Hotel in Makinac,MI");
            choice1 = choice1 + ("Grand Hotel in Makinac,MI");
            break;
        case 6:
            System.out.print("Plaza Hotel in New York,NY");
            choice1 = choice1 + ("Plaza Hotel in New York,NY");
            break;
        case 7:
            System.out.print("Royal York Hotel in Toronto");
            choice1 = choice1 + ("Royal York Hotel in Toronto");
            break;
        }
        System.out.println("");
        System.out.println("How many days do you wish to stay?");
        days = sc.nextInt();
        System.out.println("You indicate that you want to stay for " + (days) + " Days,");
        System.out.println("");
        System.out.println("We have 7 Room Types available");
        System.out.println("");

        System.out.println("Double Bed  1" + "\n" + "Single Bed(Larger)  2");
        System.out.println("Suite  3" + "\n" + "Single Bed  4");
        System.out.println("Bridle Suite  5" + "\n" + "Mega Suites  6" + "\n" + "Single bed(Largest)   7");
        System.out.println("");
        room = sc.nextInt();
        System.out.println("Price Per Night(USD): ");
        switch (room) {
        case 1:
            System.out.println("Double Bed 350(USD) a night");
            cost = 350;
            tax = 0.09 * cost;
            break;
        case 2:
            System.out.println("Single Bed(Larger) 141(USD) a night");
            cost = 141;
            tax = 0.07 * cost;
            break;
        case 3:
            System.out.println("Suite for 150(USD) a night");
            cost = 150;
            tax = 0.1 * cost;
            break;
        case 4:
            System.out.println("Single Bed 61(USD) a night");
            cost = 61;
            tax = 0.01 * cost;
            break;
        case 5:
            System.out.println("Bridle Suite for 380(USD) a night");
            cost = 380;
            tax = 0.06 * cost;
            break;
        case 6:
            System.out.println("Mega Suites for 800(USD) a night");
            cost = 800;
            tax = 0.08 * cost;
            break;
        case 7:
            System.out.println("Single bed(Largest) for 314(USD) a night");
            cost = 314;
            tax = 0.07 * cost;
            break;
        }
        System.out.println("");
        System.out.println("How many rooms?");
        num = sc.nextInt();
        System.out.println("***************************");
        System.out.println("");

        System.out.println("Based on your input,your name is " + char1 + " " + char2
                + ",\n you want to stay in " + choice1);
        System.out.print("Do you wish to Continue? (Y/N)");
        answer = sc.next().charAt(0);
        while (answer == 'Y' || answer == 'y') {
            System.out.print("Where do you classify yourself,\n");
            System.out.println("Student(1),Senior(2),Birthday(3),Coporate(4),None(0)");
            Status = sc.nextInt();

            FinalCost = cost * days * num + tax;
            switch (Status) {
            case 1:
                System.out.println("10 percent off");
                discount = 0.1 * FinalCost;
                RealPrice = FinalCost - discount;
                break;
            case 2:
                System.out.println("20 percent off");
                discount = 0.2 * FinalCost;
                RealPrice = FinalCost - discount;
                break;
            case 3:
                System.out.println("15 percent off");
                discount = 0.15 * FinalCost;
                RealPrice = FinalCost - discount;
                break;
            case 4:
                System.out.println("25 percent off");
                discount = 0.25 * FinalCost;
                RealPrice = FinalCost - discount;
                break;
            default:
                System.out.println("No discount");
                RealPrice = FinalCost;
            }

            System.out.printf("With All the values given,your total charge is: $%.2f\n ",
                    RealPrice);
        }
    }
}