Question

我想把Char'S'设置为80美元当它要求用户输入汽车尺寸时，他们应输入“S”，“M”或“L”并在字符串“每日租金：80美元”上显示输出，如果他们输入“M”，则应显示“每日租用”费率：100美元“

举个例子，说明如何将char'S'设置为$ 80

package carRental;

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Stage2 {

    public static void main(String[] args) {

        String s1 = getInput("Enter Customer Name: ");
        String s2 = getInput("Enter Customer Address: ");
        String s3 = getInput("Enter Customer phone No: ");
        String s4 = getInput("Enter Customer License No: ");
        String s5 = getInput("Enter Credit Card No: ");
        String s6 = getInput("Enter Expiry Date: ");
        String s7 = getInput("Enter Hire Length (in days): ");
        String s8 = getInput("Enter Make/Model of Assigned Vehicle: ");
        String s9 = getInput("Enter Registration No of Assigned Vehicle: ");
        String s11 = getInput("Enter Car Size - (S)mall, (M)edium or (L)arge: ");
        String s12 = getInput("Enter Days Hired: ");

        double hirerate = Double.parseDouble(s11);
        int noofdays = Integer.parseInt(s7);
        double result = hirerate * noofdays;        

        System.out.println("Customer Details: ");
        System.out.println("Name: " + s1);
        System.out.println("Address: " + s2);
        System.out.println("Phone Number: " + s3);
        System.out.println("License No: " + s4);
        System.out.println("Credit Card No: " + s5);
        System.out.println("Expiry Date: " + s6); 
        System.out.println("Car Hire Details: ");
        System.out.println("Make/Model: " + s8);    
        System.out.println("Registration No: " + s9);   
        System.out.println("Hire Length (days): " + s7);    
        System.out.println("Daily Hire Rate: " + s11);
        System.out.println("Basic Hire Charge: " + result);
        System.out.println("Days Hired: " + s12);
        System.out.println("Late Return Surcharge: ");
        System.out.println("Adjusted Hire Charge: ");


    }

    private static String getInput(String prompt) {
        BufferedReader stdin = new BufferedReader(
                new InputStreamReader(System.in));

        System.out.print(prompt);
        System.out.flush();

        try {
            return stdin.readLine();
        } catch (Exception e) {
            return "Error: " + e.getMessage();
        }
    }

}

Answer 1

您可以使用Switch Operator。

char c = /* whatever */;

switch(c) {
case 's':
case 'S':
    //Your conditions here for S
    break;
case 'm':
case 'M':
    //Your conditions here for M
    break;
// (...)
case 'l':
case 'L':
    //Your conditions here for L
    break;

}

或者您可以在切换前将其标准化为小写或大写。

char c = Character.toUpperCase(/* whatever */);

Answer 2

String rate(final char type) {
    switch (Character.toUpperCase(type)) {
    case 'S':
        return "$60";
    case 'M':
        return "$80";
    case 'L':
        return "$100";
    default:
        System.err.println("No valid entry for " + type);
        return "";//or throw 
    }
}

如何将Char'S'设置为80美元 - Java

2 个答案: