处理一个java程序，该程序计算从TXT文件导入的不同类型员工的工资。
如果我发表评论，该程序将成功构建并运行：
System.out.println("\nAverage Salary for 2014: " + (totalSalary / indexYear2014));
System.out.println("\nAverage Salary for 2015: " + (totalSalary / indexYear2015));
但是，似乎根本没有导入/使用数据。
以下是完整代码：
package computeemployeesalary;
/**
*
* @author Jason Snook
* Course name: Intermediate Programming (CMIS 242)
* Assignment: Project 1 - Compute Employee Salary
*/
/**
* This program computes the salaries of a collection of employees of
* different types: Employee, Salesman, Executive
*
* Salary for employee is calculated by multiplying monthly salary by 12
*
* Salary for salesman takes the base of employee, and then adds commission,
* which has a cap of 20000
*
* Salary for executive takes the base of employee, and then adds a bonus
* in the event that the current stock is more than 100
*/
// Imports
import java.util.Scanner;
import java.io.*;
/**
* This class contains the employee name and monthly salary
*/
// Employee class
class Employee {
// Variable declaration
String employeeName;
int monthlySalary = 0;
// Employee constructor
public Employee(String employeeName, int monthlySalary) {
this.employeeName = employeeName;
this.monthlySalary = monthlySalary;
} // end Employee constructor method
// Calculate employee annual salary
public int annualSalary() {
return monthlySalary * 12;
} // end annualSalary method
// Return employee name and annual salary as String
@Override // takes advantage from compiler checking
public String toString() {
return "Employee Name: " + employeeName +
" Salary: $" + monthlySalary;
} // end toString method
} // end employee class
/**
* This class contains the salesman annual sales and extends employee class
*/
// Salesman subclass, extends Employee class
class Salesman extends Employee {
// Variable declaration
int annualSales = 0;
// Salesman constructor
public Salesman(String employeeName, int monthlySalary, int annualSales) {
super(employeeName, monthlySalary);
this.annualSales = annualSales;
} // end Salesman constructor method
@Override // takes advantage from compiler checking
// Computes commission and annual salary
public int annualSalary() {
int commission = annualSales * 3 / 100;
// if commission is greater than 25000, then set commission to 25000
if (commission > 25000) {
commission = 25000;
} // emd comission if
return (monthlySalary * 12 + commission);
} // end annualSalary method
@Override // takes advantage from compiler checking
// Displays output details as String
public String toString(){
return "Employee Name: " + employeeName +
" Salary: $" + monthlySalary;
} // end toString method
} // end Salesman class
/**
* This class contains the current stock price and extends employee class
*/
// Executive subclass, extends Employee class
class Executive extends Employee {
// Variable declaration
int currentStockPrice = 0;
// Executive constructor
public Executive(String employeeName,
int monthlySalary, int currentStockPrice) {
super(employeeName, monthlySalary);
this.currentStockPrice = currentStockPrice;
} // end Executive constructor method
@Override // takes advantage from compiler checking
// Computes commission and annual salary
public int annualSalary() {
int executiveBonus = 0;
// Adds executive bonus if stock is greater than 100
if(currentStockPrice > 100) {
executiveBonus = 20000;
} // end executiveBonus if
return (monthlySalary * 12 + executiveBonus);
} // end annualSalary method
@Override // takes advantage from compiler checking
// Displays output details as String
public String toString() {
return "Employee Name: " + employeeName +
" Salary: $" + monthlySalary;
} // end toString method
} // end Executive class
/**
* This class computes salary based on input file and reports results
*/
public class ComputeEmployeeSalary {
// Main method
public static void main(String[] args) throws IOException {
// Import text file and compute salary increase
try {
// Create a File instance
java.io.File file = new java.io.File("employees.txt");
// Create Scanner object
Scanner input = new Scanner(file);
// Create arrays for 2014 and 2015
Employee year2014[] = new Employee[20];
Employee year2015[] = new Employee[20];
// Create indexes for 2014 and 2015 arrays
int indexYear2014 = 0, indexYear2015 = 0;
// Read data from a file
while (input.hasNext()) {
String year = input.next();
String employeeTitle = input.next();
String employeeName = input.next();
int monthlySalary = input.nextInt();
// Action if employee is a regular employee.
if (employeeTitle.equalsIgnoreCase("Employee")) {
Employee regularEmployee = new Employee(employeeName,
monthlySalary);
if (year == "2014") {
year2014[indexYear2014++] = regularEmployee;
} // end 2014 if
if (year == "2015") {
year2015[indexYear2015++] = regularEmployee;
} // end 2015 if
} // end Employee if
// Action if employee is a salesman.
if (employeeTitle.equalsIgnoreCase("Salesman")){
int annualSales = input.nextInt();
Salesman salesEmployee = new Salesman(employeeName,
monthlySalary, annualSales);
if (year == "2014") {
year2014[indexYear2014++] = salesEmployee;
} // end 2014 if
if (year == "2015") {
year2015[indexYear2015++] = salesEmployee;
} // end 2015 if
} // end Salesman if
// Action if employee is an executive.
if (employeeTitle.equalsIgnoreCase("Executive")) {
int currentStockPrice = input.nextInt();
Executive executiveEmployee = new Executive(employeeName,
monthlySalary, currentStockPrice);
if (year == "2014") {
year2014[indexYear2014++] = executiveEmployee;
} // end 2014 if
if (year == "2015") {
year2015[indexYear2015++] = executiveEmployee;
} // end 2015 if
} // end Executive if
} // end While
// Generate Report for 2014
int totalSalary = 0;
System.out.println("===== Salary Report for 2014 =====");
for (int i = 0; i < indexYear2014; i++) {
System.out.print(year2014[i]);
System.out.println(" Annual Salary: " +
year2014[i].annualSalary());
} // end annualSalary 2014 for
for (int i = 0; i < indexYear2014; i++) {
totalSalary+= year2014[i].annualSalary();
} // end totalSalary 2014 for
System.out.println("\nAverage Salary for 2014: " +
(totalSalary / indexYear2014));
// Generate Report for 2015
System.out.println("\n===== Salary Report for 2015 =====");
for (int i = 0; i < indexYear2015; i++) {
System.out.print(year2015[i]);
System.out.println(" Annual Salary: " +
year2015[i].annualSalary());
} // end annualSalary 2015 for
for (int i = 0; i < indexYear2015; i++) {
totalSalary+= year2015[i].annualSalary();
} // end totalSalary 2015 for
System.out.println("\nAverage Salary for 2015: " +
(totalSalary / indexYear2015));
// Close input file
input.close();
} // end try
catch (IOException i) {
System.out.println("Error: File Not Found, error code: " + i);
} // end catch
} // end main method
} // end ComputeEmployeeSalary class
非常感谢任何帮助。
答案 0 :(得分：1)
当你注释掉这两行时它起作用的原因是它们导致除以零的错误。 indexYear2014和indexYear2015都是0。
原因在于您比较字符串的方式：
year == "2015"应为year.equals("2015")