我相对较新的java和学习编程，这是我在大学的第8周。过去一天我一直在弄乱我的代码，我一直在搜索过去一两个小时的类似问题，这个问题可以帮助解决我的问题，但是没有找到一个可以帮助我的特定情况，至少不是我可以理解。
对于作业，我被要求编写一个包含3个类（一个接口，一个商店和一个产品类）的程序，我一直没事，直到我需要在产品中保存的界面上显示数据类。目前代码编译正常但是当我运行程序并尝试使用writeOutput（）方法时，我得到堆栈溢出错误。无论如何，这是我到目前为止：
这是我试图在接口类中工作的方法：
private void writeOutput()
{
int productChoice;
Scanner console = new Scanner(System.in);
System.out.println("Please choose a product (1),(2),(3)");
productChoice = console.nextInt();
System.out.println("The records of product " +productChoice+ " are:");
System.out.println("Name: "+matesStore.getName());
这是商店类的方法之一：
public String getName()
{
return getName();
}
最后，我将在产品类中包含getter和setter以防万一：
public void setName(String newName)
{
name = newName;
}
public String getName()
{
return name;
}
希望这足以让某人能够帮助我，但如果不是，我很乐意全部上传所有三个课程。
干杯Cale。
编辑：我已经决定添加所有三个课程来帮助那些希望帮助我的人（请记住，我无法完成任务并且我的代码可能充满了问题）希望它不会太乱你们明白了抱歉没有写很多评论，这是我需要处理的事情：）
import java.util.*;
public class MatesInterface
{
Store matesStore = new Store();
private void run()
{
showInterface();
chooseOption();
}
private void showInterface()
{
System.out.println("What would you like to do?:");
System.out.println("(1)Input data for the product");
System.out.println("(2)Show data from one product");
System.out.println("(3)Show the replenishment strategy for a product");
System.out.println("(0)Exit the program");
}
private void chooseOption()
{
int option;
boolean flag = false;
Scanner console = new Scanner(System.in);
System.out.print("Please choose an option: ");
option = console.nextInt();
if(option==1)
{
readInput();
}
else if(option==2)
{
writeOutput();
}
else if (option==3)
{
}
else if(option==0)
{
}
else
{
flag = true;
}
while (flag)
{
System.out.println("That is not a valid option.");
System.out.println("Please choose an option: ");
option = console.nextInt();
flag = false;
}
}
private void readInput()
{
Store matesStore = new Store();
String name;
int productChoice, demandRate;
double setupCost, unitCost, inventoryCost, sellingPrice;
Scanner console = new Scanner(System.in);
System.out.println("Please choose a product (1), (2) or (3): ");
productChoice = console.nextInt();
System.out.println("Please enter the product's name: ");
name = console.next();
System.out.println("Please enter the product's demand rate: ");
demandRate = console.nextInt();
System.out.println("Please enter the product's setup cost: ");
setupCost = console.nextDouble();
System.out.println("Please enter the product's unit cost: ");
unitCost = console.nextDouble();
System.out.println("Please enter the product's inventory cost: ");
inventoryCost = console.nextDouble();
System.out.println("Please enter the product's selling price: ");
sellingPrice = console.nextDouble();
matesStore.addData(productChoice, name, demandRate, setupCost, unitCost, inventoryCost, sellingPrice);
chooseOption();
}
private void writeOutput()
{
int productChoice;
Scanner console = new Scanner(System.in);
System.out.println("Please choose a product (1),(2),(3)");
productChoice = console.nextInt();
System.out.println("The records of product " +productChoice+ " are:");
System.out.println("Name: "+matesStore.getName());
}
public static void main (String[] args)
{
MatesInterface intFace = new MatesInterface();
intFace.run();
}
}
public class Store
{
// instance variables - replace the example below with your own
private Product product1, product2, product3;
public Store()
{
product1 = new Product();
product2 = new Product();
product3 = new Product();
}
public void addData(int option, String newName, int newDemand, double newSetup, double newUnit, double newInventory, double newPrice)
{
if (option==1) setData(product1, newName, newDemand, newSetup, newUnit, newInventory, newPrice);
else if (option==2) setData(product2, newName, newDemand, newSetup, newUnit, newInventory, newPrice);
else setData(product3, newName, newDemand, newSetup, newUnit, newInventory, newPrice);
}
private void setData(Product product, String name, int demandRate, double setupCost, double unitCost, double inventoryCost, double sellingPrice)
{
product.setName(name);
product.setDemand(demandRate);
product.setSetup(setupCost);
product.setUnit(unitCost);
product.setInventory(inventoryCost);
product.setPrice(sellingPrice);
}
public String getName()
{
return getName();
}
}
import static java.lang.Math.*;
public class Product
{
private String name;
private int demandRate;
//private final int REPLENISHMENTRATE=0;
private double setupCost;
private double unitCost;
private double inventoryCost;
private double sellingPrice;
//Constructors for the class Product
public Product()
{
name = "No name yet.";
demandRate = 0;
unitCost = 0;
setupCost = 0;
inventoryCost = 0;
sellingPrice = 0;
}
public Product(String newName, int newDemand, double newSetup, double newUnit, double newInventory, double newPrice)
{
name = newName;
demandRate = newDemand;
unitCost = newUnit;
setupCost = newSetup;
inventoryCost = newInventory;
sellingPrice = newPrice;
}
// Accessor and mutator methods to access and modify data on a Product object
public void setName(String newName)
{
name = newName;
}
public String getName()
{
return name;
}
public void setDemand(int newDemand)
{
demandRate = newDemand;
}
public int getDemand()
{
return demandRate;
}
public void setUnit(double newUnit)
{
unitCost = newUnit;
}
public double getUnit()
{
return unitCost;
}
public void setSetup(double newSetup)
{
setupCost = newSetup;
}
public double getSetup()
{
return setupCost;
}
public void setInventory(double newInventory)
{
inventoryCost = newInventory;
}
public double getInventory()
{
return inventoryCost;
}
public void setPrice(double newPrice)
{
sellingPrice = newPrice;
}
public double getPrice()
{
return sellingPrice;
}
}
答案 0 :(得分：1)
store类中的方法是递归调用自身而没有终止子句，这导致StackOverflowError：
public String getName()
{
return getName(); // calls itself
}
而是返回name变量的值（如果它存在于Store类中，或者您想要作为名称返回的任何变量）：
public String getName()
{
// determine the product name you want
return myProduct.getName();
}