問題傳遞到arguements構造不同的公共類

Question

我有經過hours和hourlyWage參數構造函數的類Paycheck難度。問題如下：

symbol: variable hours 
location : class Paycheck 

它重複公共類片酬小時或小時工資的每個實例。

的代碼如下

import java.util.Scanner; 

public class PayDayCalculator { 

    public static void main(String[] args) { 
     Scanner in = new Scanner(System.in); 
     System.out.println("Hourly wage: "); 
     double hourlyWage = in.nextDouble(); 
     System.out.println("Hours worked: "); 
     double hours = in.nextDouble(); 

     Paycheck paycheck = new Paycheck(hourlyWage, hours); 
     System.out.println("Pay: " + paycheck.getPay()); 
    } 
} 

---

public class Paycheck { 
    private double pay = 0; 
    private double overtime = 0; 
    private double overtimePay = 0; 

    /*double hours; 
    double hourlyWage; */ 
    Paycheck(double hourlyWage, double hours) { 
     setPay(0); 
    } 

    public void setPay(double newPay) { 
     if (hours > 40) { 
      overtime = hours % 40; 
      hours = hours - overtime; 
     } 
     overtimePay = hourlyWage * 1.5; 
     pay = (hours * pay) + (overtime * overtimePay); 
    } 

    public double getPay() { 
     return pay; 
    } 
} 

Answer 1

你setPay方法指的是hours和hourlyWage，這是在傳遞給構造函數的參數，使他們當地唯一的構造函數。它們不適用於班級中的所有方法。如果您希望所有方法都可以訪問它們，則需要在課程級別取消註釋。

double hours; 
double hourlyWage; 

Paycheck(double hourlyWage, double hours) { 
    this.hourlyWage = hourlyWage; 
    this.hours = hours; 
    setPay(0); 
} 

Answer 2

註釋掉成員變量hours：

/*double hours; 
double hourlyWage; */ 

，但還是儘量引用它，比如：

if (hours > 40) { 
    overtime = hours%40; 
    hours = hours - overtime; 
} 

如果你需要這個變量 - 取消其註釋。

Answer 3

hours和hourlyWage沒有定義！

取消註釋這部分 -

/*double hours; 
double hourlyWage; */