如果我想使用正在初始化類Worker的動態數組列表,我可以添加擴展Worker類的子類並嘗試用下面的測試類填充數據嗎?每當我嘗試調用某個函數其中一個子類有我得到一個錯誤,我需要調用這些函數,所以我如何正確地做到這一點?我可以爲動態數組列表超類的類型對象創建一個子類對象嗎?
public class Worker extends Person {
private int id;
Worker() {
}
Worker(int i) {
id = i;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String toString() {
return super.toString() + "ID: " + id + " ";
}
}
public class HourlyWorker extends Worker implements Annual {
private double rate;
private double AnnualPayment;
private double percentageIncrease;
HourlyWorker() {
}
HourlyWorker(double r) {
rate = r;
}
public double getAnnualPay(double Annualpayment) {
return Annualpayment = rate * 52 * 40;
}
public double getRate() {
return rate;
}
public void setRate(double rate) {
this.rate = rate;
}
public double getAnnualPayment() {
return AnnualPayment;
}
public void setAnnualPayment(double AnnualPayment) {
this.AnnualPayment = AnnualPayment;
}
public double getpercentageIncrease() {
return percentageIncrease;
}
public void setpercentageIncrease(double percentageIncrease) {
this.percentageIncrease = percentageIncrease;
}
public void increasePayment(double r) {
increasePayR(r);
}
public double increasePayR(double r) {
return rate = (AnnualPayment + getAnnualPay(r) * percentageIncrease)/2080;
}
public String toString() {
return "Your rate : " + rate + " ";
}
}
public class SalariedWorker extends Worker implements Annual {
private double salary;
private double AnnualPayment;
private double percentageIncrease;
SalariedWorker() {
}
SalariedWorker(double s) {
salary = s;
}
public double getAnnualPay(double Annualpayment) {
return Annualpayment = salary * 12;
}
public void increasePayment(double r) {
increasePayS(r);
}
public double increasePayS(double r) {
return salary = (AnnualPayment + getAnnualPay(r) * percentageIncrease)/12;
}
public double getSalary() {
return salary;
}
public void setSalary(double salary) {
this.salary = salary;
}
public double getAnnualPayment() {
return AnnualPayment;
}
public void setAnnualPayment(double AnnualPayment) {
this.AnnualPayment = AnnualPayment;
}
public double getpercentageIncrease() {
return percentageIncrease;
}
public void setpercentageIncrease(double percentageIncrease) {
this.percentageIncrease = percentageIncrease;
}
public String toString() {
return " ";
}
}
public class Test {
public static void main(String[] args) {
Scanner prompt = new Scanner(System.in);
ArrayList<Worker> Worker1 = new ArrayList<Worker>();
Worker1.add(new SalariedWorker());// is it alright to create a subclass object here?
Worker1.add(new SalariedWorker(1000.0));// index 1
Worker1.add(new HourlyWorker());// index 2
Worker1.add(new HourlyWorker(100.0));// index 3
System.out.println("Enter your monthly salary: ");
double salary = prompt.nextDouble();
Worker1.get(0).getSalary(salary);//gets me an error
System.out.println("Enter your hourly rate: ");
double HourlyRate = prompt.nextDouble();
System.out.println("Enter the Percentage Increase for a Salaried worker: ");
double PercentIncreaseS = prompt.nextDouble();
Worker1.get(0).getpercentageIncrease(PercentIncreaseS);//gets me an error
System.out.println("Your Increased payment is: ");
System.out.println("Enter the Percentage Increase for an Hourly worker: ");
double PercentIncreaseH = prompt.nextDouble();
}
}
我們就可以有很大的幫助更好,如果你有實際誤差的全部細節,並嘗試格式化您的一些代碼。 –
是的,你可以創建一個運行時對象(就像你想要使用的唯一的地方),但如果你需要多次使用它,你必須聲明它和錯誤的東西,你必須提供來自控制檯的完整錯誤 – emotionlessbananas
和getsalary dosen沒有任何參數 – emotionlessbananas