Question

您需要检查用户输入的四个参数   是空白的，所以你会像以前一样做四次。

识别用户是否按下<enter>

您编写了一个JAVA程序，可以创建一个包含四个CD对象的程序   实例变量，以及可以帮助您的CDException.java类   验证此输入。到目前为止，你一直在使用我的这些课程   司机班。现在是时候创建一个真正的驱动程序类了   这将实现CD对象的ArrayList。这是一个列表   最新计划的要求


从用户
中读取艺术家姓名
从用户
中读取相册名称
阅读库存中的商品数量

阅读相册的价格


您的程序应继续从用户读取CD信息，直到用户对所有字段的所有条目都为空。然后，您的程序将打印列表中输入的所有“有效”CD   用户。

我一直收到这样的错误

CDStore.java:12: error: cannot find symbol
Disk d;
^
symbol: class Disk
location: class CDStore

CDStore.java:61: error: cannot find symbol
catch(CDException cde){
^
symbol: class CDException
location: class CDStore

CDStore.java:67: error: cannot find symbol
for(int i = 0; i < CDShelf.length( ); i++){
^
symbol: method length()
location: variable CDShelf of type ArrayList

CDStore.java:68: error: cannot find symbol
d = (Disk)(CD.get(i));
^
symbol: class Disk
location: class CDStore

CDStore.java:68: error: cannot find symbol
d = (Disk)(CD.get(i));
^
symbol: method get(int)
location: class CD
5 errors

看起来我的驱动程序类没有链接到我的异常类。如何摆脱这些错误，将非常感谢任何帮助！

import java.util.*;
import java.text.*;

public class CDStore{
        public static void main (String[ ] arg)throws Exception{

     String sArtist = "";
     String sAlbum = "";
     int inStock = 0;
     double dPrice = 0;
     String C = "";
     Disk d;
     int count = 0;
     boolean exit = false;


     Scanner reader = new Scanner (System.in);
     ArrayList CDShelf = new ArrayList( );

      do{
        try{
            System.out.print("What is the Artist name: ");
            sArtist = reader.nextLine( );
            reader = new Scanner(System.in);

            if(sArtist.length( ) < 1){
               exit = true;
         }

            System.out.print("What is the album name: ");
            sAlbum = reader.nextLine( );
            reader = new Scanner(System.in);

            if(sAlbum.length( ) < 1){
               exit = true;
         }
            System.out.print("What is the price: ");
            dPrice = reader.nextDouble( );
            reader = new Scanner(System.in);

            if(dPrice < 1){
               exit = true;
         }
            System.out.print("How many are in stock: ");
            inStock = reader.nextInt( );
            reader = new Scanner(System.in);
            d = new CD(sArtist, sAlbum, dPrice, inStock);

            if(inStock < 1){
               exit = true;
         }

            CD.add(d);
            count++;
            System.out.println(C.toString( ));
            System.out.println("=============================");
        }
        catch(InputMismatchException ime){
            System.out.println("You didnt do it");
        }
        catch(CDException cde){
            System.out.println(cde.getMessage( ));
        }
    }while(count < 3);

    System.out.println("This is what you entered");
    for(int i = 0; i < CDShelf.length( ); i++){
        d = (Disk)(CD.get(i));
        System.out.println(d.toString( ));
    }
    }
}

错误无法找到符号＆amp;似乎我的驱动程序类没有与其他类链接

0 个答案: