> For the complete documentation index, see [llms.txt](https://knowledgebase.autorabit.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://knowledgebase.autorabit.com/product-guides/integral-zone/iz-suite/iz-scan/vs-code-extension/installation/prerequisites.md).

# Prerequisites

{% hint style="warning" %}

* The IZ Scan VSCode Extension plugin requires Java version 11 or higher, but no greater than Java 21
  {% endhint %}

Java installation will be checked in the following order, and if none of them are found, a prompt will be issued to install Java, which will be used exclusively by the IZ Scan Extension.

### Installation availability in the command line

Checks whether Java version is already installed and available as part of the command line command. The following command will be executed to check the Java installation: > java -version openjdk version "11.0.15" OpenJDK Runtime Environment Homebrew (build 11.0.15+0) OpenJDK 64-Bit Server VM Homebrew (build 11.0.15+0, mixed mode)

### JAVA\_HOME environment variable

Validates whether the **`JAVA_HOME`** environment variable is configured, and if configured, ensures that the Java version meets the specified requirements.

### Java Home directory from settings

1. Validates whether the Java home path is configured as part of the **`izscan.ls.java.home`** variable in user settings.
2. Use `Ctrl+Shift+P` (Cmd+Shift+P on macOS) and search for `User Settings (JSON)` to open the view.

### Install Java to be used by IZ Scan Extension

1. If a valid version of Java is not found from any of the above steps, a prompt will be shown to install the required Java version.

   <figure><img src="/files/1YnApB1MozB6yDSOvFuj" alt=""><figcaption></figcaption></figure>
2. Click on "Install" to proceed with the Java installation, and once completed, restart the Visual Studio instance.

### See Also

* [Install IZ Scan for Desktop](/product-guides/integral-zone/iz-suite/iz-scan/vs-code-extension/installation/desktop-version.md)
* [Install IZ Scan for Cloud](/product-guides/integral-zone/iz-suite/iz-scan/vs-code-extension/installation/cloud-version.md)
* [IZ Analyzer Configuration](/product-guides/integral-zone/iz-suite/iz-scan/vs-code-extension/configuration/iz-analyzer.md)


---

# 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, and the optional `goal` query parameter:

```
GET https://knowledgebase.autorabit.com/product-guides/integral-zone/iz-suite/iz-scan/vs-code-extension/installation/prerequisites.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.