> For the complete documentation index, see [llms.txt](https://hanfak.gitbook.io/workspace/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hanfak.gitbook.io/workspace/languages/java/beginner/setup.md).

# Setup the system

* Installing java/JDK
  * Knowing the difference between JDK, JRE and JVM
  * `java -version` to verify
* Setting up the path
  * Setup JAVA\_HOME, `export JAVA_HOME=/<your_JDK_folder>` for mac
    * for linus `export JAVA_HOME=/usr/local/jdk`
  * setup java and javac path: `export PATH=$PATH:$JAVA_HOME/bin/`
* Installing and setting up IDE (Intellij)
  * Can use Eclipse or Netbeans, but Intellij is far better
* Settings to use JDK
  * Create new project using maven and add java build in pom.xml
  * See for a common starter pom file <https://github.com/hanfak/java-generics/blob/master/pom.xml>
    * For options 'groupId' and 'artifactId' when asked, use a package structure like com. as groupId and name of project as artifactId.
* Running a simple hello world program through Intellij to check it is working

  ```java
  public class Example {
      public static void main(String[] args) {
          System.out.println("Hello, World");
      }
  }
  ```

  * Use of shortcuts ie `sout` and `psvm`

## Java Home

* <https://self-learning-java-tutorial.blogspot.com/2017/06/why-and-how-to-set-javahome.html>

### Links

* <https://www.tutorialspoint.com/java/java_environment_setup.htm>
* <https://www.java.com/en/download/help/download_options.xml>
* <https://confluence.atlassian.com/adminjiraserver073/installing-java-861253016.html>
* <https://github.com/codepath/android_guides/wiki/Setting-up-IntelliJ-IDEA>
* <https://www.jetbrains.com/help/idea/configuring-mobile-java-sdk.html>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://hanfak.gitbook.io/workspace/languages/java/beginner/setup.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.