我有3个类:Order
,InternalOrder
和OrderTester
。我一直在寻找一段时间,对于我一直在寻找的东西,我只是无法尝试将这些示例更改为我需要的东西。计算不正确,不知道为什么
所以我遇到了InternalOrder
和OrderTester
类的问题。到目前为止我的代码因为这两者都是...
public class InternalOrder extends Order {
public static final int DISCOUNT = 40/100;
public InternalOrder(String productName, int quantity) {
super(productName, quantity, DISCOUNT);
}
public void printInternalReport() {
System.out.println("Printing internal report...");
}
}
而且
public class OrderTester {
public static void main(String[] args) {
testCase1();
testCase2();
testCase3();
testCase4();
testCase5();
testCase6();
testCase7();
testCase8();
testCase9();
testCase10();
}
public static void testCase1() {
Order ord = new Order();
System.out.println("Test Number : " + Order.orderNum + " Type of Order : Normal, " + "Product Name : " + "Order Quantity : " + "Discount : ");
}
public static void testCase2() {
Order ord = new Order();
System.out.println("Test Number : " + Order.orderNum + " Type of Order : Normal, " + "Product Name : " + "Order Quantity : " + "Discount : ");
}
好,它进入测试10,但它是目前所有相同。
这里有我需要的东西:
的InternalOrder
类是包含内部谁下令 固定的股票作为其工作要求的一部分恒星固定工作人员的逻辑。
内部订单自动获得40%的折扣。
- 该
InternalOrder
类是扩展Order
类。 - 是包含一个名为
DISCOUNT
的final static
字段。该字段用作 的常数,该折扣率是员工收到的折扣率,应设为40%。
现在,我有这两个,但我不完全确定下一部分。
- 该类包含一个构造函数。构造函数将接收两个 参数,productName和数量。构造函数是将这些参数 传递给它的超类(Order)以及
DISCOUNT
常量作为第三个参数 。
我是否需要在超类中添加任何内容,因为这很让我困惑。与OrderTester
,我有一个表很难导入,所以我只会产生几条线。
的OrderTester
类用于启动该程序,并测试Order
和 InternalOrder
类以确保其工作正常。
有十个测试需要运行,每个测试应该是自己的一个静态方法,并且它们应该被称为testCase1()
到testCase10()
。每个测试应该测试按照 如下表:
Test Number Type of Order Product Name Order Quantity Discount
1 "Normal" "N/A" "N/A" "N/A"
有了这个测试。我不确定我的数量和折扣是如何产生“不适用”的。
如果你需要我的其他代码,我会在下面发布它。
public class Order {
private String productName;
private double price;
private int discount;
private int quantity;
private double total;
private String message;
private boolean isDiscounted;
private boolean isValidOrder;
public static int orderNum = 0;
public Order() {
isValidOrder = false;
message = "**ERROR** Order number cannot be totalled as no details have been supplied.";
orderNum++;
}
public Order(String productName, int quantity){
this.productName = productName;
this.quantity = quantity;
getPrice(this.productName);
if(isValidOrder != false){
calculate();
}
orderNum++;
}
public Order(String productName, int quantity, int discount){
this.productName = productName;
testQuantity(quantity);
getPrice(productName);
if(isValidOrder != false){
calculate();
}
orderNum++;
}
private String getOrderDetails(){
message = message;
if(isValidOrder == true && isDiscounted == false){
message = "Order Number: " + quantity + "\n" + "Product Name; " + productName + "\n" + "Product Price: $" + price + "\n" + "Order Quantity: " + quantity + "\n" + "Total Price: $" + total;
} else if(isValidOrder == true && isDiscounted == true){
message = "Order Number: " + quantity + "\n" + "Product Name; " + productName + "\n" + "Product Price: $" + price + "\n" + "Order Quantity: " + quantity + "\n" + "Total Price: $" + total;
} else {
return message;
}
return message;
}
private void calculate(){
if(this.isDiscounted == false){
total = quantity * price;
} else {
total = quantity * price - quantity * price * (discount/100);
}
}
private void getPrice(String productName){
switch(productName){
case "Pencil":
this.price = 0.6;
break;
case "Pen":
this.price = 0.3;
break;
case "Ruler":
this.price = 1.2;
break;
case "Pencil Sharpener":
this.price = 0.3;
break;
case "Compass":
this.price = 4.5;
break;
case "Erasor":
this.price = 4.5;
break;
case "Scissors":
this.price = 2.5;
break;
case "Pencil Case":
this.price = 10.0;
break;
default:
this.price = 0.0;
this.isValidOrder = false;
this.message = "**ERROR**: Invalid product name";
break;
}
}
private void testDiscount(int discount) {
if (discount <=0) {
message = "**ERROR**: The discount rate cannot be lower than or equal to 0.";
}
else if (discount >50) {
message = "**ERROR**: The discount rate cannot be higher than 50.";
} else {
this.discount = discount;
this.isDiscounted = true;
}
}
private void testQuantity(int quantity){
if(quantity <=0) {
isValidOrder = false;
message = ("**ERROR**: Invalid quantity. Quantity cannot be 0 or less.");
message = message + "messagehere";
message += "messagehere";
}
else if (quantity >1000) {
isValidOrder = false;
message = ("**ERROR**: Invalid quantity. Quantity cannot be greater than 1000.");
} else {
isValidOrder = true;
this.quantity = quantity;
}
}
}
感谢您提供的信息,只是在我发布时才实际意识到我忘记了更改折扣 – ChokeOnThis