title: Java Invoice program - set quantity to 0 set price to 0.0
body: <p>I have pretty much completed this program except when I set a price or quantity object to a negative number it does not set to 0. The directions say if the price is not a positive number it should be set to 0.0 and if the quantity is not a positive number it should be set to 0. Here are my codes can anyone tell me where I went wrong.</p>
  
  <p>This exercise is 3.12 Invoice class form Deitel 10th edition How to program:</p>
  
  <pre><code>public class Invoice {  
  private String partNumber;
  private String partDescription;
  private int quantity;
  private double priceperitem;
  private double amount;  
  public Invoice(String number, String partDescription, int quantity, double price)
  {       
          this.partNumber = number;
          this.partDescription = partDescription;
          this.quantity = quantity;
          this.priceperitem = price;
  }       
  public void setPartNumber(String number)
  {           
          partNumber = number;            
  }       
  public String getPartNumber()
  {           
          return partNumber;
  }   
  public void setPartDescription (String description)
  {           
          partDescription = description;
  }       
      public String getPartDescription(){         
          return partDescription;         
      }   
      public void setQuantity(int count){         
          if(count &gt; 0)
              quantity = 0;           
      }       
      public int getQuantity(){           
          return quantity;
      }   
      public void setPrice (double price){            
          if(price &gt; 0.0)
              priceperitem = price;           
          if(price &lt; 0.0)
              priceperitem = 0.0; 
      }       
      public double getPrice(){           
          return priceperitem;
      }   
      public double getInvoiceAmount(){           
           amount = getQuantity() * getPrice();           
           return amount;
      }       
  }
  
  import java.util.Scanner;
  public class InvoiceTest {
  public static void main(String[] args) {        
      int quantity;
      double price;
      double invoiceAmount;       
      Invoice invoice1 = new Invoice("1234","Hammer",-5, -39.75);     
      Scanner keyboard = new Scanner (System.in);     
      System.out.printf( "Part number: %s\n", invoice1.getPartNumber());
      System.out.printf( "Part Description: %s\n", invoice1.getPartDescription());
      System.out.printf( "Quantity: %s\n", invoice1.getQuantity());
      System.out.printf( "Price: %s\n", invoice1.getPrice());
   }
  }
  </code></pre>