How to comunicate two class in the same package

Question

I HAVE SET MY CLASSPATH as /home/shadab/program/java/MyPack in CLASSPATH environment variable.
below is a super class java file Protection.java
I also compiled it successfully using javac Protection.java
package MyPack;
public class Protection {
int n = 1;
private int n_pri = 2;
protected int n_pro = 3;
public int n_pub = 4;
public Protection() {
System.out.println("base constructor ");
System.out.println("n = " + n);
System.out.println("n_pri = " + n_pri);
System.out.println("n_pro = " + n_pro);
System.out.println("n_pub = " + n_pub);
Below is subclass of superclass
package Mypack;
class Derived extends Protection {
Derived() {
System.out.println("Derived constructor ");
System.out.println("n = " +n);
// System.out.println("n_pri = " + n_pri);
System.out.println("n_pro = " + n_pro);
System.out.println("n_pub = " + n_pub);
while i compiled subclass
javac Derived.java
following error occured
Derived.java:3: cannot find symbol
symbol: class Protection
class Derived extends Protection {
^
Derived.java:8: cannot find symbol
symbol : variable n
location: class Mypack.Derived
System.out.println("n = " +n);
^
Derived.java:11: cannot find symbol
symbol : variable n_pro
location: class Mypack.Derived
System.out.println("n_pro = " + n_pro);
^
Derived.java:12: cannot find symbol
symbol : variable n_pub
location: class Mypack.Derived
System.out.println("n_pub = " + n_pub);
PLEASE HELP ME TO SOLVE THIS PROBLEM ..

Answer 1

1. To post code, use the code tags -- [code]Your Code[/code]will display asYour CodeOr use the code button above the editing area and paste your code between the {code}{code} tags it generates.
2. Read this page:
[http://java.sun.com/docs/codeconv/html/CodeConvTOC.doc.html]
3. I advise that you don't use the CLASSPATH environment variable. Instead, use the -classpath or -cp flag when compiling/running.
4. The package root must be available on the classpath. Since your classes are in the package MyPack and in the folder /home/shadab/program/java/MyPack, that means that /home/shadab/program/java must be on the classpath.
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