Question

我尝试修改我的代码以添加GUI，不确定我是否正确执行了此操作并收到如下错误消息：

C:\Documents and Settings\AdminUser\My Documents\InventoryPart4.java:40: invalid method declaration; return type required
public Television(String itemNumber, String televisionName, int unitsinStock, double unitPrice) {

^ 1错误

工具已完成，退出代码为1

如果有人可以查看下面的代码，请告诉我是否按照这些说明正确完成了修改.GUI应显示清单中的所有项目，并包括项目编号，产品名称，编号库存单位，每个单位的价格，以及该产品的库存价值。此外，GUI应显示整个库存的值，附加属性和重新进货费用。所有美元值都应显示为货币（即$ D，DDD.CC）。 DOS控制台中不应该有任何输出。我真的很努力地把握所有这一切，但如果我做得对，我会感到非常困惑和沮丧。特别是因为我不确定如何修复错误。如果有人能在一天之后给我一些意见，我会非常感激，并且还有两个部分即将到期。

enter code here

//第7周库存计划第4部分 //在电视课程中存储数据的库存程序 //使用GUI返回数据 //添加了子类Size

import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JPasswordField;
import javax.swing.JOptionPane;
import javax.swing.JLabel;




@SuppressWarnings("serial")
public class Televisions extends JFrame { //class name and attributes

    //declare class variables
    private String itemNumber; //item # of product
    private String televisionName; //product name
    public int unitsinStock; //# of units in stock
    public double unitPrice; //Price per unit

       NumberFormat nf = NumberFormat.getCurrencyInstance(Locale.US);

   //class constructor

  public Television(String itemNumber, String televisionName, int unitsinStock, double unitPrice) {
      this.itemNumber = itemNumber;
      this.televisionName = televisionName;
      this.unitsinStock = unitsinStock;
      this.unitPrice = unitPrice;

}   //end constructor

   //define set and get methods for class variables
   //getter and setter methods for Television

   //item number
public String getItemNumber() { //getter for item number
    return itemNumber;
} //end getter item number

public void setItemNumber (String itemNumber) { //setter for item number
    this.itemNumber = itemNumber;
} //end setter item number

//television name
public String getTelevisionName() { //getter for product name
        return televisionName;
} //end getter television name

public void setTelevisionName (String product) { //setter for product name
    this.televisionName = televisionName;
} //end setter television name

 //available units
public double getUnitsInStock() { //getter for units in stock
        return unitsinStock;
} //end getter units in stock

public void setUnitsInStock (double units) { //setter for units in stock
    this.unitsinStock = unitsinStock;
} //end setter units in stock

 //price
public double getUnitPrice() { //getter for unit price
        return unitPrice;
} //end getter for unit price

public void setUnitPrice (double price) { //setter for unit price
    this.unitPrice = unitPrice;
} //end setter unit price


 //calculate the total inventory by returning the product of available units and price
public double calculateInventory(){
    return unitPrice * unitsinStock;
}

//toString method that outputs the class variables
public String toString () {
        return "Television Name:" + "\t" + televisionName + "\n" +
               "Item Number:" + "\t" + itemNumber + "\n" +
               "UnitsInStock:" + "\t \t" + unitsinStock + "\n" +
               "UnitPrice:" + "\t \t" + nf.format(unitPrice) + "\n" +
               "Item Total:" + "\t" + nf.format(calculateInventory());
               }

}

Answer 1

这是方式太多代码供任何人阅读，但我可以告诉你，错误消息告诉你类Televisions的名称与名称不匹配您用于构造函数Television。这显然必须匹配！

库存计划修改的问题第4部分

1 个答案: