classpath problem

[Asha Pathik]

Hi all,

I've been trying to execute a program for now 2 days and I'm not able to get my classpath correct. Here I'm writing the code as well as the commands that I'm giving. Kindly help.

Animal.java in C:\jdk\bin\corejava folder

package A;
 
public class Animal
{
public void eat()
{
System.out.println("Animal Eating");
}
}

and compiled using javac -d . Animal.java command from c:\jdk\bin\corejava prompt.

Bird.java in the same folder

import A.*;
 
public class Bird extends Animal
{
public static void main(String ar[])
{
Bird b= new Bird();
b.eat();
}
 
}

Now I don't know what should I give in as a value of classpath so that my Bird.java file compiles. Everytime it will give me bad class file : Animal

Thanks

[Keith Lynn]

If this is your class definition

package A;
 
public class Animal
{
public void eat()
{
System.out.println("Animal Eating");
}
}

,

then it must be placed in a directory named A.

[Chris Beckey]

After compiling Animal you should end up with a directory "A" under the current directory and "Animal.class" in that. The classpath when compiling "Bird" should just include the current directory (not "A" or "A.Animal"). After compiling "Bird" there should be a "Bird.class" in the current directory.

[Campbell Ritchie]

You are correct to use javac -d . Animal.java, which seems to work when I use Windows.
Try deleting the Animal.java file after you have compiled it into "A". I did. It worked (on Linux). No idea why you are getting this error.

Try Keith Lynn's suggestion and put Animal in directory A and back. Note you have to compile Animal from a command prompt in A before you can try compiling Bird from a command line in C:\jdk\bin\corejava.

BTW: You oughtn't to be keeping your exercises in a jdk\bin folder. Make yourself a "JavaPrograms" folder in MyDocuments or C drive or somewhere, so as to avoid confusion with the jdk files.

[Asha Pathik]

Thanks....Thanks...Thanks all of you. Finally my program is running.

[Campbell Ritchie]

We're only too pleased to help.