CODEWITHSUNDEEP
javajava-7
Mad coder.
Mad coder.

Reputation: 2175

Importing a user defined class in java

The below is a test code where I am getting an error Pizza order = new Pizza(); I believe that I didn't import Pizza.class to Pizzaorder.class file. Can anybody help me in fixing this error.

Code follows.

Pizza.java

package pizza;
public class Pizza {
        private double cost; //the cost of the pizza
    private String crust; //the type of crust
    private int size; //the diameter in inches
    private int numToppings; //the number of toppings
    private String toppingList; //a list of the toppings
    public static void main(String[] args) {
    }
    public Pizza()
    {
        cost = 12.99;
        crust = "Hand-tossed";
        size = 12;
        numToppings = 0;
        toppingList = null;
    }
    public void setCost (double amount)
        {
            cost += amount;
        }
    public void setCrust (String type)
    {
        crust = type;
    }
    public void setSize (int diameter)
    {
        size = diameter;
    }
    public void setNumToppings(int number)
    {
        numToppings = number;
    }
    public void setToppingList (String newTopping)
    {
        toppingList = newTopping;
    }
    public double getCost()
    {
        return cost;
    }
    public String getCrust()
    {
        return crust;
    }
    public int getSize()
    {
        return size;
    }
    public int getNumToppings()
    {
        return numToppings;
    }
    public String getToppingList()
    {
        return toppingList;
    }
}

PizzaOrder.java

package pizza;
import java.util.Scanner;
public class PizzaOrder {
    public static void main (String [] args)
    {
                Scanner keyboard = new Scanner (System.in);
                Pizza order = new Pizza ();
                String firstName;
        boolean discount = false;
                int inches; 
        char crustType; 
        double cost; 
        final double TAX_RATE = .08;
        double tax;
        char choice; 
        String input;
        String toppings = "Cheese ";
        int numberOfToppings = 0;
        System.out.println("Welcome to Abdul and " +
        "Diane’s Pizza");
        System.out.print("Enter your first name: ");
        firstName = keyboard.nextLine();
        System.out.println("Pizza Size (inches)     Cost");
        System.out.println("        10          £10.99");
        System.out.println("        12          £12.99");
        System.out.println("        14          £14.99");
        System.out.println("        16          £16.99");
        System.out.println("What size pizza would you like?");
        System.out.print("10, 12, 14, or 16 " + "(enter the number only): ");
        inches = keyboard.nextInt();
        keyboard.nextLine();
        System.out.println("What type of crust do you want? ");
        System.out.print(
        "(H)Hand-tossed, (T) Thin-crust, or " +
        "(D) Deep-dish (enter H, T, or D): ");
        input = keyboard.nextLine();
        crustType = input.charAt(0);
                System.out.println("All pizzas come with cheese.");
        System.out.println(
        "Additional toppings are £1.25 each,"
        + " choose from");
        System.out.println(
        "Pepperoni, Sausage, Onion, Mushroom");
        System.out.print("Do you want Pepperoni? (Y/N): ");
        input = keyboard.nextLine();
        choice = input.charAt(0);
        if (choice == 'Y' || choice == 'y')
        {
            numberOfToppings += 1;
            toppings = toppings + "Pepperoni ";
        }
        System.out.print("Do you want Sausage? (Y/N): ");
        input = keyboard.nextLine();

        choice = input.charAt(0);
        if (choice == 'Y' || choice == 'y')
        {
            numberOfToppings += 1;
            toppings = toppings + "Sausage ";
        }
        System.out.print("Do you want Onion? (Y/N): ");
        input = keyboard.nextLine();

        choice = input.charAt(0);
        if (choice == 'Y' || choice == 'y')
        {
            numberOfToppings += 1;
            toppings = toppings + "Onion ";
        }
        System.out.print("Do you want Mushroom? (Y/N): ");
        input = keyboard.nextLine();
        choice = input.charAt(0);
        if (choice == 'Y' || choice == 'y')
        {
            numberOfToppings += 1;
            toppings = toppings + "Mushroom ";
        }
        order.setNumToppings (numberOfToppings);
        order.setToppingList(toppings);
        order.setCost(1.25*numberOfToppings);
        System.out.println();
        System.out.println("Your order is as follows: ");
        System.out.println(order.getSize() + " inch pizza");
        System.out.println(order.getCrust() + " crust");
        System.out.println(order.getToppingList());
        cost = order.getCost();
                System.out.println("The cost of your order is: £" +
        cost);
        tax = cost * TAX_RATE;
        System.out.println("The tax is: £" + tax);
        System.out.println("The total due is: £" +
        (tax+cost));
        System.out.println("Your order will be ready" +
        " for pickup in 30 minutes.");
    }
}

Error:

C:\Users\Meutex\Documents\Netbeans projects>javac PizzaOrder.java
PizzaOrder.java:23: error: cannot find symbo

Additional error.

C:\Users\Meutex\Documents\Netbeans projects\Pizza>java Pizza.PizzaOrder
Exception in thread "main" java.lang.NoClassDefFoundError: Pizza/PizzaOrder (wro
ng name: pizza/PizzaOrder)
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:14
2)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
        at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:472)

Upvotes: 0

Views: 13926

Answers (5)

vamsy krrish
vamsy krrish

Reputation: 1

If a class has a package it cannot be simply compiled by the program name with extension javac Pizza.java. A directory has to be created for storing the particular classes in its package. It should be compiled using javac -d . Pizza.java command where . will create the folder of package in the current directory. To create the folder in another location mention the location name like javac -d e:\user Pizza.java

Upvotes: -1

Maurice Perry
Maurice Perry

Reputation: 32831

Pizza.java and PizzaOrder.java are in package pizza, therefore should be in a folder named pizza. If you're not compiling both files together, the classpath must be set so that the compiler can find pizza/Pizza.class when compiling PizzaOrder.java.

UPDATE:

Let's say the current directory is C:\Users\Meutex\Documents\Netbeans projects (btw, why are You not using netbeans to compile your project), and your pizza directory is inside it, then the command would be:

javac -cp . pizza/PizzaOrder.java

Upvotes: 0

Andrew
Andrew

Reputation: 7516

The problem is that you're not compiling both files.

Change javac PizzaOrder.java to be javac PizzaOrder.java Pizza.java

Edit:

To run your program, put PizzaOrder.class and Pizza.class in a directory called pizza. From the parent directory of pizza run java pizza.PizzaOrder.

Upvotes: 3

James Jithin
James Jithin

Reputation: 10555

When you have declared the classes in the package pizza, all the compiles class files should go inside a folder pizza. To achieve this, do the following.

  1. Keep the files in a directory, say Project.
  2. On the command line, go to Project folder.
  3. Create a folder build inside the Project folder.
  4. Copy all your .java files to Project folder.
  5. On the command line, compile the code with -d option. i.e. execute javac -d build *.java You will see another folder pizza created inside the build folder.
  6. To run the application, do cd build.
  7. Type java pizza.PizzaOrder

Upvotes: 1

KarlP
KarlP

Reputation: 5191

Below is the output from your program: It seems to work. Do you have both your classes in the same folder called "pizza"?

Welcome to Abdul and Diane’s Pizza
Enter your first name: K
Pizza Size (inches)     Cost
        10          £10.99
        12          £12.99
        14          £14.99
        16          £16.99
What size pizza would you like?
10, 12, 14, or 16 (enter the number only): 10
What type of crust do you want? 
(H)Hand-tossed, (T) Thin-crust, or (D) Deep-dish (enter H, T, or D): T
All pizzas come with cheese.
Additional toppings are £1.25 each, choose from
Pepperoni, Sausage, Onion, Mushroom
Do you want Pepperoni? (Y/N): Y
Do you want Sausage? (Y/N): Y
Do you want Onion? (Y/N): Y
Do you want Mushroom? (Y/N): Y

Your order is as follows: 
12 inch pizza
Hand-tossed crust
Cheese Pepperoni Sausage Onion Mushroom 
The cost of your order is: £17.990000000000002
The tax is: £1.4392000000000003
The total due is: £19.4292
Your order will be ready for pickup in 30 minutes.

There are a lot of considerations regarding the "style" of your program, like curly brace-placement, defining variables at the top of the methods like in C, and not dividing the main class into smaller methods, but for a beginner, it is ok.

Upvotes: 0

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