问题描述
我不知道在哪里添加 main 方法，以便我可以运行这个类。帮助！我也不知道把 main 方法放在哪里。
这个班级管理一家美发沙龙。全局变量用于跟踪dailyRevues（总收入）、dailyTax（总税额）和理发次数、永久性染发次数和染色次数。此外，要跟踪接受服务的客户数量。要打印一份每日报告，提供客户总数、理发、烫发和染发剂的总数。此外，需要在每日报告中打印收入（收入）和税收的总额。最后，应该计算每个客户花费的平均金额并将其打印在报告中。如果商店带来 650 美元或更多，那么商店经理会收到每日总收入的 5% 作为奖金。您应该在您的报告中包括商店经理奖金，并从总收入中减去它以得出当天的净收入。随意添加您认为必要的其他变量和方法
这是我的代码
import java.util.Scanner;
public class Salon {
See example report*/
//Globals
Scanner input = new Scanner(system.in);
int hairCuts = 0;
int permanents = 0;
int colorings = 0;
int customers = 0;
double dailyRev = 0;
double total = 0;
double dailyTax = 0;
double bonus; //money due the manager if certain conditions are met
final double COSTHC = 20; //Cost of HairCut
final double COSTPERM = 50; //Cost of Permanent
final double COSTCOLORING = 60; //Cost of Coloring
final double COSTHC_PERM = (COSTHC * 0.85) + (COSTPERM * 0.85); //Cost of Haircut and Permanent
final double COSTCOL_PERM = (COSTPERM * 0.85) + (COSTCOLORING * 0.85); //Cost of Perm and Coloring
final double COSTHC_COL = (COSTHC * 0.85) + (COSTCOLORING * 0.85); //Cost of Haircut and Coloring
final double COSTHC_PERM_COL = (COSTHC * 0.85) + (COSTPERM * 0.85) + (COSTCOLORING * 0.85); //Cost of Cut,Perm and Color
public void menu() {
//preconditions: none
//postconditions: the correct method is called depending on the user's
//input,totalValues are updated appropriately
int choice;
do {
System.out.println("---------MENU---------");
System.out.println("1 = Reset Daily Totals");
System.out.println("2 = Haircut Only");
System.out.println("3 = Permanent Only");
System.out.println("4 = Coloring Only");
System.out.println("5 = Haircut and Coloring");
System.out.println("6 = Haircut and Permanent");
System.out.println("7 = Permanent and Coloring");
System.out.println("8 = Haircut,Permanent and Coloring");
System.out.println("9 = Print Daily Report");
System.out.println("10 = Exit");
choice = input.nextInt();
if (choice == 10) {
System.exit(0);
}
if (choice == 1) {
resetTotals();
}
if (choice == 2) {
hairCuts++;
customers++;
dailyRev = dailyRev + COSTHC;
dailyTax = 0.07 * dailyRev;
total = dailyRev + dailyTax;
System.out.println("Haircut only: $");
System.out.println("Charge: $" + dailyRev);
System.out.println("Tax: $" + dailyTax);
System.out.println("Total: $" + total);
}
if (choice == 3) {
permanents++;
customers++;
dailyRev = dailyRev + COSTPERM;
dailyTax = 0.07 * dailyRev;
total = dailyRev + dailyTax;
System.out.println("Permanent only: $");
System.out.println("Charge: $" + dailyRev);
System.out.println("Tax: $" + dailyTax);
System.out.println("Total: $" + total);
}
if (choice == 4) {
colorings++;
customers++;
dailyRev = dailyRev + COSTCOLORING;
dailyTax = 0.07 * dailyRev;
total = dailyRev + dailyTax;
System.out.println("Coloring only: $");
System.out.println("Charge: $" + dailyRev);
System.out.println("Tax: $" + dailyTax);
System.out.println("Total: $" + total);
}
if (choice == 5) {
hairCuts++;
colorings++;
customers++;
dailyRev = dailyRev + COSTHC_COL;
dailyTax = 0.07 * dailyRev;
total = dailyRev + dailyTax;
System.out.println("Haircut and Coloring: $");
System.out.println("Charge: $" + dailyRev);
System.out.println("Tax: $" + dailyTax);
System.out.println("Total: $" + total);
}
if (choice == 6) {
hairCuts++;
permanents++;
customers++;
dailyRev = dailyRev + COSTHC_PERM;
dailyTax = 0.07 * dailyRev;
total = dailyRev + dailyTax;
System.out.println("Haircut and Permanent: $");
System.out.println("Charge: $" + dailyRev);
System.out.println("Tax: $" + dailyTax);
System.out.println("Total: $" + total);
}
if (choice == 7) {
permanents++;
colorings++;
customers++;
dailyRev = dailyRev + COSTCOL_PERM;
dailyTax = 0.07 * dailyRev;
total = dailyRev + dailyTax;
System.out.println("Coloring and Permanent: $");
System.out.println("Charge: $" + dailyRev);
System.out.println("Tax: $" + dailyTax);
System.out.println("Total: $" + total);
}
if (choice == 8) {
hairCuts++;
colorings++;
permanents++;
customers++;
dailyRev = dailyRev + COSTHC_PERM_COL;
dailyTax = 0.07 * dailyRev;
total = dailyRev + dailyTax;
System.out.println("haircut,Coloring,and Permanent: $");
System.out.println("Charge: $" + dailyRev);
System.out.println("Tax: $" + dailyTax);
System.out.println("Total: $" + total);
}
if (choice == 9) {
printReport();
}
} while (true);
}
public void resetTotals() {
hairCuts = 0;
permanents = 0;
colorings = 0;
customers = 0;
dailyRev = 0;
dailyTax = 0;
}
public void printReport() {
if (customers == 0) {
return;
}
System.out.println("Daily Report for Salon");
System.out.println("Number of Customers: $" + customers);
System.out.println("Number of Hair Cuts: $" + hairCuts);
System.out.println("Number of Permanents: $" + permanents);
System.out.println("Number of Colorings: $" + colorings);
System.out.println("Average amount spent per customer(Not including Tax): $" + (total / customers));
System.out.println("Total Revenues: $" + dailyRev);
System.out.println("Total Tax: $" + dailyTax);
if (dailyRev >= 650) {
System.out.println("Manager Bonus: $" + (dailyRev * 0.05));
System.out.println("Total Net Revenues: $" + 1.05 * dailyRev);
} else {
System.out.println("Manager Bonus: $0");
System.out.println("Total Net Revenues: $" + dailyRev);
}
}
}
解决方法
在 Java 中，一切都是一个类。主要方法在类中编写如下：
[DllImport("user32",CharSet = CharSet.Auto,SetLastError = true)]
internal static extern bool GetMonitorInfo(
IntPtr hmonitor,ref MonitorInfoEx info);
[StructLayout(LayoutKind.Sequential,Pack = 4)]
internal struct MonitorInfoEx
{
public uint cbSize;
public RECT rcMonitor;
public RECT rcWork;
public uint dwFlags;
[MarshalAs(UnmanagedType.ByValArray,SizeConst = 32)]
public char[] szDevice;
}
var info = new MonitorInfoEx
{
cbSize = (uint)Marshal.SizeOf(typeof(MonitorInfoEx)),};
GetMonitorInfo(hDesktop,ref info);
在你的情况下：
public class Main
{
public static void main(String[] args) {
System.out.println("Hello World");
}
}
将以下代码段添加到您的沙龙课程中。
public static void main(String[] args){
Salon salon=new Salon();
salon.menu();
}
import java.util.Scanner;
class Saloon {
/* See example report */
//Globals
Scanner input = new Scanner(System.in);
int hairCuts = 0;
int permanents = 0;
int colorings = 0;
int customers = 0;
double dailyRev = 0;
double total = 0;
double dailyTax = 0;
double bonus; //money due the manager if certain conditions are met
final double COSTHC = 20; //Cost of HairCut
final double COSTPERM = 50; //Cost of Permanent
final double COSTCOLORING = 60; //Cost of Coloring
final double COSTHC_PERM = (COSTHC * 0.85) + (COSTPERM * 0.85); //Cost of Haircut and Permanent
final double COSTCOL_PERM = (COSTPERM * 0.85) + (COSTCOLORING * 0.85); //Cost of Perm and Coloring
final double COSTHC_COL = (COSTHC * 0.85) + (COSTCOLORING * 0.85); //Cost of Haircut and Coloring
final double COSTHC_PERM_COL = (COSTHC * 0.85) + (COSTPERM * 0.85) + (COSTCOLORING * 0.85); //Cost of Cut,Perm and Color
public void menu() {
//preconditions: none
//postconditions: the correct method is called depending on the user's
//input,totalValues are updated appropriately
do {
System.out.println("---------MENU---------");
System.out.println("1 = Reset Daily Totals");
System.out.println("2 = Haircut Only");
System.out.println("3 = Permanent Only");
System.out.println("4 = Coloring Only");
System.out.println("5 = Haircut and Coloring");
System.out.println("6 = Haircut and Permanent");
System.out.println("7 = Permanent and Coloring");
System.out.println("8 = Haircut,Permanent and Coloring");
System.out.println("9 = Print Daily Report");
System.out.println("10 = Exit");
int choice;
choice = input.nextInt();
// if (choice == 10) {
// System.exit(0);
// }
if (choice == 1) {
resetTotals();
}
if (choice == 2) {
hairCuts++;
customers++;
dailyRev = dailyRev + COSTHC;
dailyTax = 0.07 * dailyRev;
total = dailyRev + dailyTax;
System.out.println("Haircut only: $");
System.out.println("Charge: $" + dailyRev);
System.out.println("Tax: $" + dailyTax);
System.out.println("Total: $" + total);
}
if (choice == 3) {
permanents++;
customers++;
dailyRev = dailyRev + COSTPERM;
dailyTax = 0.07 * dailyRev;
total = dailyRev + dailyTax;
System.out.println("Permanent only: $");
System.out.println("Charge: $" + dailyRev);
System.out.println("Tax: $" + dailyTax);
System.out.println("Total: $" + total);
}
if (choice == 4) {
colorings++;
customers++;
dailyRev = dailyRev + COSTCOLORING;
dailyTax = 0.07 * dailyRev;
total = dailyRev + dailyTax;
System.out.println("Coloring only: $");
System.out.println("Charge: $" + dailyRev);
System.out.println("Tax: $" + dailyTax);
System.out.println("Total: $" + total);
}
if (choice == 5) {
hairCuts++;
colorings++;
customers++;
dailyRev = dailyRev + COSTHC_COL;
dailyTax = 0.07 * dailyRev;
total = dailyRev + dailyTax;
System.out.println("Haircut and Coloring: $");
System.out.println("Charge: $" + dailyRev);
System.out.println("Tax: $" + dailyTax);
System.out.println("Total: $" + total);
}
if (choice == 6) {
hairCuts++;
permanents++;
customers++;
dailyRev = dailyRev + COSTHC_PERM;
dailyTax = 0.07 * dailyRev;
total = dailyRev + dailyTax;
System.out.println("Haircut and Permanent: $");
System.out.println("Charge: $" + dailyRev);
System.out.println("Tax: $" + dailyTax);
System.out.println("Total: $" + total);
}
if (choice == 7) {
permanents++;
colorings++;
customers++;
dailyRev = dailyRev + COSTCOL_PERM;
dailyTax = 0.07 * dailyRev;
total = dailyRev + dailyTax;
System.out.println("Coloring and Permanent: $");
System.out.println("Charge: $" + dailyRev);
System.out.println("Tax: $" + dailyTax);
System.out.println("Total: $" + total);
}
if (choice == 8) {
hairCuts++;
colorings++;
permanents++;
customers++;
dailyRev = dailyRev + COSTHC_PERM_COL;
dailyTax = 0.07 * dailyRev;
total = dailyRev + dailyTax;
System.out.println("haircut,Coloring,and Permanent: $");
System.out.println("Charge: $" + dailyRev);
System.out.println("Tax: $" + dailyTax);
System.out.println("Total: $" + total);
}
if (choice == 9) {
printReport();
}
} while (true);
}
public void resetTotals() {
hairCuts = 0;
permanents = 0;
colorings = 0;
customers = 0;
dailyRev = 0;
dailyTax = 0;
}
public void printReport() {
if (customers == 0) {
return;
}
System.out.println("Daily Report for Salon");
System.out.println("Number of Customers: $" + customers);
System.out.println("Number of Hair Cuts: $" + hairCuts);
System.out.println("Number of Permanents: $" + permanents);
System.out.println("Number of Colorings: $" + colorings);
System.out.println("Average amount spent per customer(Not including Tax): $" + (total / customers));
System.out.println("Total Revenues: $" + dailyRev);
System.out.println("Total Tax: $" + dailyTax);
if (dailyRev >= 650) {
System.out.println("Manager Bonus: $" + (dailyRev * 0.05));
System.out.println("Total Net Revenues: $" + 1.05 * dailyRev);
} else {
System.out.println("Manager Bonus: $0");
System.out.println("Total Net Revenues: $" + dailyRev);
}
}
}
public class Salon{
public static void main(String []args){
Saloon s = new Saloon();
s.menu();
}
}
你可以在这个类下面再创建一个主类
同时从沙龙课程中删除 public 并将类 Salon 重命名为 Saloon
public class Saloon()
{
public static void main(String args[]){
//Now create an object of class above
Saloon s1 = new Saloon();
// Now call the method you want
s1.menu();
}
}