请问高手这个java哪里错了

Question

package candyMachine;
public class Dispenser
   {
     private int numberOfltems;
     private int cost;
     public Dispenser()
        { numberOfltems = 50;
           cost = 50;
        }
     public Dispenser( int setNoOfltems, int setCost )
        { if( setNoOfltems >= 0 )
                numberOfltems = setNoOfltems;
           else
                numberOfltems = 50;
            if( setCost >= 0 )
                  cost = setCost;
            else
                  cost = 50;
         } 
      public int getCount()
          { return numberOfltems;
          }
       public int getProductCost()
           { return cost;
           }
       public void makeSale()
           { numberOfltems --;
            }
   }
package candyMachine;
public class CashRegister
   {private int cashOnHand;
     public CashRegister( int cashIn )
         {if(cashIn >= 0)
                cashOnHand = cashIn;
           else
                 cashOnHand = 500; 
          }
     public CashRegister()
         {cashOnHand = 500;
          }
     public int currentBalance()
          {return cashOnHand;
           }
     public void acceptAmount( int amountIn )
          {cashOnHand = cashOnHand + amountIn;
          }
    } 
import java.io.* ;
import candyMachine.* ;
public class CandyMachine
{    static BufferedReader keyboard = new BufferedReader( new InputStreamReader( System.in ) );
  public static void main( String[] args ) throws IOException
     {     
   
    CashRegister cashRegister = new CashRegister();
             Dispenser andy = new Dispenser(100, 50 );
            Dispenser chips = new Dispenser( 100,65 );
            Dispenser gum = new Dispenser( 75,45 );
            Dispenser cookies = new Dispenser( 100,85 );
            int choice;
            showSelection();
            choice = Integer.parseInt( keyboard.readLine() );
             while( choice != 9 )  
              {    switch( choice )
                   {      case 1: sellProduct( candy, cashRegister );
                                  break;                           case 2: sellProduct( chips, cashRegister );
                                  break;
                      
                           case 3: sellProduct( gum, cashRegister );
                                   break;                           case 4: sellProduct( cookies, cashRegister );
                                    break;
                          default: System.out.println( "Invalid Selection " );
                   }
                 showSelection();
                 choice = Integer.parseInt( keyboard.readLine() );    
          }       
      }
  public static void showSelection()
  {     System.out.println( "*** Welcome to shelly's Candy Shop ***" );
         System.out.println( "To select an item,enter" );
         System.out.println( "1 for Candy" );
         System.out.println(  "2 for Chip" );
         System.out.println( "3 for Gum " );
         System.out.println( "4 for Cookies" );
           System.out.println( "9 to exit");
   }
      
  public static void sellProduct( Dispenser product, CashRegister cRegister ) throws IOException
   { int amount;
      int amount2;
      if( product.getCount() > 0 )
           { System.out.println( "Please deposit" + product.getProductCost() + "cents" );
              amount = Integer.parseInt( keyboard.readLine());
              
              if(amount < product.getProductCost())
               { System.out.println( "Please deposit another" +(product.getProductCost() - amount) + "cents");
                  amount2 = Integer.parseInt( keyboard.readLine() );
                  amount = amount + amount2;
                }
               if( amount >= product.getProductCost() )
                   { cRegister.acceptAmount( amount );
                       product.makeSale();
                       System.out.println( "Collect your item at the bottom" + " and enjoy." ) ;
                    }
                else
                     System.out.println( "The amount is not enough. Collect what you deposited.");
                       System.out.println( "*_*_*_*_*_*_*_*_*_*_*_*_*_");
                      
              }
       else
                 System.out.println( "Sorry this item is sold out" );
   }
  
  
   
}  

Answer 1

帮楼主排个版，看着舒服点=)package candyMachine; 
public class Dispenser 
  { 
    private int numberOfltems; 
    private int cost; 
    public Dispenser() 
        { numberOfltems = 50; 
          cost = 50; 
        } 
    public Dispenser( int setNoOfltems, int setCost ) 
        { if( setNoOfltems >= 0 ) 
                numberOfltems = setNoOfltems; 
          else 
                numberOfltems = 50; 
            if( setCost >= 0 ) 
                  cost = setCost; 
            else 
                  cost = 50; 
        } 
      public int getCount() 
          { return numberOfltems; 
          } 
      public int getProductCost() 
          { return cost; 
          } 
      public void makeSale() 
          { numberOfltems --; 
            } 
  } 
package candyMachine; 
public class CashRegister 
  {private int cashOnHand; 
    public CashRegister( int cashIn ) 
        {if(cashIn >= 0) 
                cashOnHand = cashIn; 
          else 
                cashOnHand = 500; 
          } 
    public CashRegister() 
        {cashOnHand = 500; 
          } 
    public int currentBalance() 
          {return cashOnHand; 
          } 
    public void acceptAmount( int amountIn ) 
          {cashOnHand = cashOnHand + amountIn; 
          } 
    } 
import java.io.* ; 
import candyMachine.* ; 
public class CandyMachine 
{    static BufferedReader keyboard = new BufferedReader( new InputStreamReader( System.in ) ); 
  public static void main( String[] args ) throws IOException 
    {    
  
    CashRegister cashRegister = new CashRegister(); 
            Dispenser andy = new Dispenser(100, 50 ); 
            Dispenser chips = new Dispenser( 100,65 ); 
            Dispenser gum = new Dispenser( 75,45 ); 
            Dispenser cookies = new Dispenser( 100,85 ); 
            int choice; 
            showSelection(); 
            choice = Integer.parseInt( keyboard.readLine() ); 
            while( choice != 9 )  
              {    switch( choice ) 
                  {      case 1: sellProduct( candy, cashRegister ); 
                                  break;                           case 2: sellProduct( chips, cashRegister ); 
                                  break; 
                      
                          case 3: sellProduct( gum, cashRegister ); 
                                  break;                           case 4: sellProduct( cookies, cashRegister ); 
                                    break; 
                          default: System.out.println( "Invalid Selection " ); 
                  } 
                showSelection(); 
                choice = Integer.parseInt( keyboard.readLine() );    
          }      
      } 
  public static void showSelection() 
  {    System.out.println( "*** Welcome to shelly's Candy Shop ***" ); 
        System.out.println( "To select an item,enter" ); 
        System.out.println( "1 for Candy" ); 
        System.out.println(  "2 for Chip" ); 
        System.out.println( "3 for Gum " ); 
        System.out.println( "4 for Cookies" ); 
          System.out.println( "9 to exit"); 
  } 
      
  public static void sellProduct( Dispenser product, CashRegister cRegister ) throws IOException 
  { int amount; 
      int amount2; 
      if( product.getCount() > 0 ) 
          { System.out.println( "Please deposit" + product.getProductCost() + "cents" ); 
              amount = Integer.parseInt( keyboard.readLine()); 
              
              if(amount < product.getProductCost()) 
              { System.out.println( "Please deposit another" +(product.getProductCost() - amount) + "cents"); 
                  amount2 = Integer.parseInt( keyboard.readLine() ); 
                  amount = amount + amount2; 
                } 
              if( amount >= product.getProductCost() ) 
                  { cRegister.acceptAmount( amount ); 
                      product.makeSale(); 
                      System.out.println( "Collect your item at the bottom" + " and enjoy." ) ; 
                    } 
                else 
                    System.out.println( "The amount is not enough. Collect what you deposited."); 
                      System.out.println( "*_*_*_*_*_*_*_*_*_*_*_*_*_"); 
                      
              } 
      else 
                System.out.println( "Sorry this item is sold out" ); 
  } 
  
  
  
}  

Answer 2

Dispenser andy = new Dispenser(100, 50 ); 
case 1: sellProduct(candy, cashRegister );变量名不一致
                            

Answer 3

谢谢。运行成功了，请问高手如何能让程序从myeclipse中导出呢

Answer 4

导出？你指的是生成jar文件或exe文件吗？

Answer 5

File-->Export-->Java-->JAR File
然后填写一些相关的东西，还有导出的JAR文件要存放的位置，最后点"finish"就OK了！