java - 输出值总是返回不正确的东西

Question

我目前正在编写我的项目，除了我的总工资结果总是 0.0 之外，我似乎一切都已完成，而且我不知道在哪里或如何修复它。这些是我的代码，应该打印出来有多少员工？ 1

工作时间、工资率和员工姓名以空格分隔:37.25 15.5 Tony Stark员工姓名:托尼·斯塔克工作时间:37.25
工资标准:15.50
总工资:$577.38

public class Project3 {
public static void main(String[] theArgs) {

  Scanner console = new Scanner(System.in);
  double hours = 0.0;
  double payRate = 0.0;
  int employeeCount = getEmployeeCnt(console);
  double grossPay = getGrossPay(payRate, hours);
  processEmployeePay(console, employeeCount, grossPay, hours, payRate);

}
  public static int getEmployeeCnt(Scanner theConsole) {
    System.out.print("How many employees are there? ");
    return theConsole.nextInt();
  }
  public static String processEmployeePay(Scanner theConsole, int 
  employeeCount, double grossPay, double hours, double payRate) {
  String empFirst = "";
  String empLast = "";
  for(int i = 1; i <= employeeCount; i++) {
     System.out.print("Enter Hours Worked, Pay Rate, and Employee Name separated by a space: ");
     hours = theConsole.nextDouble();
     payRate = theConsole.nextDouble();
     empFirst = theConsole.next();
     empLast = theConsole.next();
     System.out.println("\t Employee Name: " + "\t" + empFirst + " " + empLast);
     System.out.println("\t Hours Worked: " + "\t" + hours);
     System.out.println("\t Pay Rate: " + "\t" + payRate);
     System.out.println("\t Gross Pay: " + "\t" + grossPay);
  }
  return "";
}
  public static double getGrossPay(double payRate, double hours) {
     double result = 0.0;
     if (hours >= 48) {
        result = (2 * hours * payRate);
     } else{
       if (hours <= 48) {
          result = (1.5 * hours * payRate);
       }  else {
            if (hours > 40) {
              result = (1.5 * hours * payRate);
          }
              else { 
                if (hours <= 40) {
                  result = (hours * payRate);
                }
              }
            }
        }
   return result;
}


}

Answer 1

使你的变量为类级别，因为它是本地的，它有默认值。并且在processEmployeePay中设置值不会设置该值，因为java是按值传递的。

参见java-is-strictly-pass-by-value

按如下方式更改:

class Your-Class{
   private static double payRate = 0.0
   ... 
   Other fields

   public static processEmployeePay(Scanner sc){
    payRate = sc.nextDouble();
    // others too
   }

}