Question

Learning java newly. Can anybody clear my doubt in following?

My demo application has code like this

SourcePackages —> ex1.pkg1
|
—>food

1. My ex1.pkg1 has one class called Ex11 and it contains the main function.
2. My food package contains one abstract class fruit and another subclass of class fruit as Apple.
3. I am creating an instance of Apple class in my main function in class Ex11.

The code compiles fine and runs also fine. But I am trying to understand the directory structure in java.

When I run the program I can see the following folders inside the build/class directory

1. ex1 -> pkg1 -> Ex11.class
2. food -> Apple.class and fruit.class
3. fruit -> empty

I don’t understood why the directory fruit is created although I don’t have any package named fruit? Even if I delete it and compile again its not created. But created when I run the application.

Extra Info – I am using netbean IDE

Answer 1

To answer your question Not exactly. You can create same directory structures ( hence same package) in different locations and even in different jars. For example; you can have directories CoreDomain\com\example and CoreServices\com\example. Now, classes within these two directories will have same package com.example even though they are in different directories ( but same directory with ref. to starting point ; as both are in com.example )