Question

我正在为以下任务编写以下代码，但我最难重写为switch语句，请帮我正确写。

ABC社区医院需要一个程序来计算和打印每位患者的账单。下表显示了各种服务的费用：

ABC社区医院

每日房费：私人550.0美元半私人350.0美元病房$ 105.00

电话$ 4.50

电视$ 7.50

药物$ 275.00

写一个名为Hospital的类，它接受以下指标： •患者姓名（名字和姓氏） •一个整数，表示患者在医院的天数。 •表示患者选择的房间类型的单个字符。房间类型（P / p =私人，S / s表示半私人，W / W表示病房）

作为结算的一部分，请注意以下事项： •如果患者选择私人房间，则药物费用是计费表上显示的两倍;如果患者选择半私人，那么药物费用就是计费表上显示的;如果患者选择病房，则计费成本是计费表上显示的一半。 •选择私人房间的患者支付电视服务和电话服务的费用;选择半私人房间的病人支付电视服务费用，选择病房的病人可以免费获得电视和电话服务。

import java.text.NumberFormat;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
/**
 *
 * @author Andrea
 */
public class hospital {


    private double roomCharges;
    private double telephone;
    private double television;
    private double medication;
    private static final NumberFormat nf = NumberFormat.getCurrencyInstance();
    private double totalCharges;
    private String header;
    private String s;
    char roomType;
    int noOfdays;



    public hospital() {
        totalCharges = 0.0;
        s = "";
        header = "\tThe ABC Community Hospital\n"
                + "\t       Patient Billing Statement\n\n";
    }

    hospital (int i, char p )
    {
        noOfdays = i;
        roomType = p;
    }

    public void getBillingStatement() {
        JTextArea b = new JTextArea("\tThe ABC Community Hospital\n\n"
                + "Room Charges:\n\tPrivate\t\t$550.0\n\tSemi-Private\t\t$350.0\n\tWard\t\t"
                + "$105.0\n\nTelephone\t\t\t$4.50\n\nTelevision\t\t\t$7.50\n\n"
                + "Medication\t\t\t$275.00", 14, 35);
        JScrollPane p1 = new JScrollPane(b);
        JOptionPane.showMessageDialog(null, p1, "Charges",
                JOptionPane.INFORMATION_MESSAGE);

        int days = Integer.parseInt(JOptionPane.showInputDialog("Days patient has been in the       Hospital:"));
        if (days > 0) {
            s = s + "Number of days in hospital:\t\t" + days + "\n";
        } else {
            s = s + "Number of days in hospital must be positive!\n";
            days = 0;
        }

        String room = JOptionPane.showInputDialog("Type of room: (P,S,W)");
        switch (room.toUpperCase()) {
            case "P":
                if (room.equalsIgnoreCase("P")) 
            roomCharges = 550.0;
            s = s + "Type of room:\t\t\tPrivate\n\n"
                    + "Room Charge:\t\t\t" + nf.format(days * roomCharges) + "\n";
            totalCharges = totalCharges + (days * roomCharges);
                break;
            case "S":
                if (room.equalsIgnoreCase("S")) 
            roomCharges = 350.0;
            s = s + "Type of room:\t\t\tSemi-Private\n\n"
                    + "Room Charge:\t\t\t" + nf.format(days * roomCharges) + "\n";
            totalCharges = totalCharges + (days * roomCharges);
                break;
            case "W" : 
                if (room.equalsIgnoreCase("W")) 
            roomCharges = 105.0;
            s = s + "Type of room:\t\t\tWard\n\n"
                    + "Room Charge:\t\t\t" + nf.format(days * roomCharges) + "\n";
            totalCharges = totalCharges + (days * roomCharges);
            default:
                 roomCharges = 0.0;
            s = s + "Please select a valid room type\n\n"
                    + "Room Charge:\t\t\t" + nf.format(days * roomCharges) + "\n";
            totalCharges = totalCharges + (days * roomCharges);

                break;
        }

        String phone = JOptionPane.showInputDialog("Telephone: (Y/N)");
        if (phone.equalsIgnoreCase("Y")) {
            telephone = 4.50;
            s = s + "Telephone:\t\t\t" + nf.format(telephone) + "\n";
            totalCharges = totalCharges + telephone;
        } else if (phone.equalsIgnoreCase("N")) {
            telephone = 0.0;
            s = s + "Telephone:\t\t\t" + nf.format(telephone) + "\n";
            totalCharges = totalCharges + telephone;
        } else {
            telephone = 0.0;
            s = s + "Invalid telephone option\n";
            totalCharges = totalCharges + telephone;
        }

        String tv = JOptionPane.showInputDialog("Television: (Y/N)");
        if (tv.equalsIgnoreCase("Y")) {
            television = 7.50;
            s = s + "Television:\t\t\t" + nf.format(television) + "\n";
            totalCharges = totalCharges + television;
        } else if (tv.equalsIgnoreCase("N")) {
            television = 0.0;
            s = s + "Television:\t\t\t" + nf.format(television) + "\n";
            totalCharges = totalCharges + television;
        } else {
            television = 0.0;
            s = s + "Invalid television option\n";
            totalCharges = totalCharges + television;
        }

        JOptionPane.showMessageDialog(null, "Medication will be charged as well");
        medication = 275.0;

        s = s + "Medication:\t\t\t" + nf.format(medication) + "\n";
        totalCharges = totalCharges + medication;

        s = s + "Total Charges:\t\t\t" + nf.format(totalCharges) + "\n";
    }

        public static void main(String[] args) {

                    hospital i = new hospital(20, 's');
                    i.getBillingStatement();



        }



    }

Answer 1

你用这样的东西切换它（看我在那里做了什么？）：

switch(room.toUpperCase()) {
    case "P":
        //do stuff for P
        break;
    case "S":
        //do stuff for S
        break;
    .....
    default:
        //do what's in your "else" block
        break;
}

switch语句决定查看哪个项目，然后每个案例都针对每个结果。如果您的案例都不匹配，则代码将运行默认案例。休息时间也非常重要。如果我理解正确，没有中断，您的代码将执行下面的每个案例代码并包括匹配的案例。如果你想要这个实现，这可能很方便，但看起来你可能不会在这里。

有关switch-case的更多信息，请访问： https://docs.oracle.com/javase/tutorial/java/nutsandbolts/switch.html

如果elses重写为switch语句，我已经用elses编写了这段代码并需要重写为switch

1 个答案: