Package Statement.

[Suresh Rajadurai]

Hi folks.

I have a program in the folder c:\javatest\p

package p;

public class parent
   {
	protected int i = 5;
	public int j = 6;
   }

I have compiled this program and it created a class file in the same folder.

I created another program in the folder c:\javatest

import p.*;

class child extends parent
  {
	public static void main(String arg[])
	   {
		parent obj = new parent();
		System.out.println(obj.i);
	   }
  }

The second program gives compilation error:

cannot find symbol
symbol: variable i
location class parent.


Then I replaced the i with public variable j, assuming because it was declared protected it gave compilation error, but still for variable j, even though it was declared as public it gives the same compilation error. can anybody throw some light on it please.


much appreciated


thanks in advance


Suresh.

[Harshit Rastogi]

To access i variable this line is wrong.

   System.out.println(obj.i);   

Since the child class is in different package , you extend parent to inherit it.
you dont need to create parent object.
use the following line:

  System.out.println(i);    

it will work..

[J radolf]

protected variables cannot be accessed through parent objects outside package.

so line 7 is wrong by java rules.
check it

but in case of public variable J it can be accessed check it again.

[Manish R Singh]

Please refer a similar post by Ashutosh chauhan Package problem
http://www.coderanch.com/t/435718/Java-General-beginner/java/Package

He had a excellent query(accessing outer package from inner package) after several attempts he got the answer for that!

you have to just include the java -cp <path> <filename.java> command to compile
. for current directory
.. for parent directory

you can use these relative naming pattern for setting appropriate path


Also have you placed the second file in a package or not .i suppose you have not !
Also most people do not know protected fields are accessible only through inheritance,you cannot make a reference and access a protected field i suppose this is not the major cause as you were saying it gives same error when field is changed to public !so it got to be the classpath problem please read the above and if you have time read the Package Problem from Ashutosh Chauhan!

[Manish R Singh]

[MG] Edited. Please use the forum not the mail.
http://faq.javaranch.com/java/UseTheForumNotEmail

[Maneesh Godbole]

Hagemaru Shou wrote:

Please check your private messages for an important administrative matter.

Also please read http://faq.javaranch.com/java/UseTheForumNotEmail

[Manish R Singh]

I have not provided my email Godbole

[Maneesh Godbole]

Manish Chodle wrote:

Not good.
Please check your private messages again.

[Manish R Singh]

Now i have posted my original name i can give you proof for my name

[Komal Amaresh]

As you have extended the parent class, its variables can be accesed by the child class. the parent class is in a subdirectory p. so you cannot access it through the object of the parent class. try it by an object of the child class itself.

Komal

[David O'Meara]

Manish Chodale wrote:Now i have posted my original name i can give you proof for my name

Account closed. please stick to the original topic.

/Dave