库存计划修改的问题第4部分

Question

我试图修改我的代码以添加GUI,不确定我是否正确执行此操作并收到1错误消息,如下所示:

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地进行了修改.GUI应显示清单中的所有项目,并包括项目编号,产品名称,单位数量库存,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.非常感谢如果有人能够在一天之后给我提供一些意见,并且还有另外两个部分即将推出.

enter code here

//第7周库存计划第4部分//在Television类中存储数据的库存程序//使用GUI返回数据//使用添加的子类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

这是这样的人读太多的代码,但是我可以告诉你的是,错误消息告诉您类的名称Televisions不匹配时使用的构造函数的名称,Television.这显然必须匹配!