Be sure to set your classpath environment variable. It should include “.” and all other directories you wish the compiler to search in for byte code files. After setting the classpath from the command line type “echo %classpath%” to be sure it was set.

Ways to have access to another class.

• The other class is defined in the same file.
• The other class’s byte code file is in the classpath and it was not defined within a package.
• The start of the path to the other class’s byte code file is in the classpath and it is defined within a package named the same as the remainder of the path.
• This method works if the programmer imports the package containing the class to be used.
• The method also works if the other class is defined in the same package as the class using it.

Examples:

package edu.harding.oop.steil;

//import edu.harding.oop.steil.B;

//import edu.harding.oop.steil.*;

public class A

{

public static void main(String args[])

{

B b = new B();

}

}

//compile this file with the -d directive to save the

//class file in c:\some_directory\edu\harding\oop\steil

package edu.harding.oop.steil;

public class B

{

public static void main(String args[])

{

}

}