java.lang.NoClassDefFoundError

[corleone]

Having problems with my assignment for college. Newbie and new to this forum so bare with me.
Been asked to do the following:
"Write a class called, Product that has the following attributes a name, a price and description. Write get and set methods for each of the attributes. It should have a constructor that takes three parameters, name, price and description. It should also have a toString method that returns the details of the Product.A stock room can hold a fixed number of Products, e.g. fixed number is 10 then the maximum number of products a stock room can hold is 10.

Create a class called, StockRoom that will store the fixed number of Products (hint: array). The StockRoom will have a constructor that takes an integer, which represents the fixed number (or maximum number) of Products that the stock room can hold.

This class should include methods to allow for
- new products to be added to the stock room – cannot store more than maximum number allowed in the stock room.
- a list of all products to be printed out.

Write an application to test the methods of the StockRoom."

This is what I have at the moment.
-----------------------------------------------------------------------
public class Product{

public String name;
public Double price;
public String description;
public String productString;

public Product(){
}


public Product(String name, Double price, String description){
this.name=name;
this.price=price;
this.description=description;
}


public String toString(){
productString="name" + "price" + "description";
return productString;
}


public void setName(String name){
this.name=name;
}

public void setPrice(Double price){
this.price=price;
}

public void setDescription(String description){
this.description=description;
}


public String getName(){
return name;
}

public Double getPrice(){
return price;
}

public String geDescription(){
return description;
}



}
------------------------------------------------------------------------
public class StockRoom{

public Product[] stockRoomArray;
public int maxPoductsInStockRoom;
public int productPosition;
public Product productToAdd;


public StockRoom(int maxPoductsInStockRoom){
this.maxPoductsInStockRoom=maxPoductsInStockRoom;
stockRoomArray = new Product[maxPoductsInStockRoom];
}

public void printProductList(){
int n;
for (n=0;n<maxPoductsInStockRoom;n++){
System.out.println("Product in position "+n+": "+stockRoomArray[n]);
}
}

public int addProduct(Product productToAdd){
if (productPosition>=maxPoductsInStockRoom){
System.out.println("The stock room is full!");
}
else{
stockRoomArray[productPosition]= productToAdd;
}
return productPosition;
}

public void addPos(int productPosition, Product productToAdd){
stockRoomArray[productPosition]= productToAdd;
}

}
-----------------------------------------------------------------------
When I run StockRoom I get java.lang.NoClassDefFoundError: StockRoom
Both compiles without errors. Any idea whats wrong with the code? Any help is much appreciated.
Email

[Gengar003]

There is nothing wrong with your code if it compiles correctly. Occaisonally, Java gives this error. I have suffered the same error on various occaisions; usually it's because of the way you're trying to run the .class file.

I know of no fix that works in every case, and can't offer any suggestions without knowing how you're trying to run StockRoom.class.

[Phaelax]

How exactly did you plan on running a class with no main method? That error is being thrown because you're trying to run a class with no main method.

public static void main(String[] args)

[sudheerprem]

Try adding current directory (./) in your classpath and run.