public class Invoice implements Payable{
private String partNumber;
private String partDescription;
private int quantity;
private double pricePerItem;
public Invoice(String part,String description,int
count,double price){
partNumber=part;
partDescription=description;
setQuantity(count);
setPricePerItem(price);
}
public void setPartNumber(String part){
partNumber=part;
}
public String getPartNumber(){
return partNumber;
}
public void setPartDescription(String
description){
partDescription=description;
}
public String getPartDescription(){
return partDescription;
}
public void setQuantity(int count){
quantity=(count<0)?0:count;
}
public int getQuantity(){
return quantity;
}
public void setPricePerItem(double price){
pricePerItem=(price<0.0)?0.0:price;
}
public double getPricePerItem(){
return pricePerItem;
}
public String toString(){
return String.format("%s:\n%s:%s(%s)\n%s:%d\n
%s:$%,.2f","invoice","part number",getPartNumber
(),getPartDescription(),"quantity",getQuantity
(),"price per item",getPricePerItem());
}
public double getPaymentAmount()
{
return getQuantity()*getPricePerItem();
}
}
提示：
Invoice.java:1:找不到符号
符号：类：Payable
public class Invoice implements Payable{
^
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