How to use a class from a parent directory in Java?

Question

For example, I have a class called Foo inside Foo.java which will use a class called Bar inside ../Bar.java. Is there any

Answer 1

Add your class to classpath..

javac -cp "path to your Bar.class" Foo.java

You will need to import that class in your Foo.java also.. Better use a package, and give the classpath till the directory containing your package..That way you will be able to give different namespaces to your classes..

So, if your package is: - pkg1.pkg2.Barand you have saved your .java to a directory named Demo, then your classpath should contain path till Demo.. And your classes will actually be under two more directory pkg1/pkg2/Bar.class inside Demo directory..

Demo+
    |
    +-- B.java (`Under package pkg1.pkg2)
    |
    +--pkg1+
    |      |
    |      +--pkg2+
    |             |
    |             +-- B.class
    |
    +-- A.java (`Under no package`) - Add - import pkg1.pkg2.B 
    |
    +-- A.class (javac -cp . A.java) - Will search the package pkg1.pkg2 in current directory

Even though . is not needed there, you can replace it with any path, if your B.class is somewhere else..