Integrating DeepSeek AI Assistant into IntelliJ IDEA for Java Development

Welcome to the "Top Architecture Tech Stack" article, which introduces how to integrate the DeepSeek AI assistant into IntelliJ IDEA for Java developers, enhancing coding efficiency with an intelligent helper.

Introduction

The post notes the rapid rise of AI tools in programming and highlights DeepSeek as a high‑performance option that can be added to IDEA.

1. Environment Preparation

IDEA Version Compatibility

Use IntelliJ IDEA 2023.x or newer and install the CodeGPT plugin (an AI‑driven code assistant) as a replacement for GitHub Copilot and similar tools.

Python Environment

DeepSeek requires Python 3.7+; ensure it is installed and added to the system PATH.

Macbook:GithubCommitSpace Aion$ python --version
Python 3.12.8
Macbook:GithubCommitSpace Aion$

2. Download and Install DeepSeek Plugin

Install AI‑Driven Code Assistant from IDEA Marketplace

Open IDEA, go to Settings (Windows/Linux) or IntelliJ IDEA → Preferences (macOS), select Plugins , search for CodeGPT , and install it.

Create and Set API Key

Obtain an API key from the DeepSeek Open Platform ( https://www.deepseek.com/ ) and enter it in the DeepSeek settings within IDEA.

Configure DeepSeek in IDEA

In the CodeGPT settings, under Custom OpenAI , configure three sections:

API Key – paste the key obtained earlier.

Chat model – set URL to https://api.deepseek.com/chat/completions and model to deepseek-chat .

Reasoning model – enable code completions, select the DeepSeek Coder FIM template, set URL to the same endpoint, and choose model deepseek-reasoner .

3. Using DeepSeek for Programming

Getting Ideas and Code

Open the CodeGPT component, select Custom OpenAI , and type a prompt such as "Write a Java method to filter numbers and provide a test".

public class TestNumberFilter {
    public static String filterNumbers(String input) {
        // Use regex to keep only digits
        return input.replaceAll("[^0-9]", "");
    }
    public static void main(String[] args) {
        String testInput2 = "SSFSDFS结论萨芬122432的噶大都是4无人区是14认识832safsss";
        String result = filterNumbers(testInput2);
        System.out.println("Filtered numbers: " + result);
    }
}

Code Completion

Press Ctrl + Space (or a custom shortcut) to let DeepSeek suggest the rest of the code based on context.

Code Explanation

Select a code block, right‑click, choose CodeGPT , and DeepSeek will explain its functionality.

Question Answering

Highlight code or describe an issue, then select CodeGPT: Ask Question to receive targeted solutions.

4. DeepSeek Usage Statistics

The article shows token usage charts for the deepseek-chat model, including daily request counts and estimated costs.

Conclusion

Following these steps successfully integrates DeepSeek into IDEA, allowing developers to enjoy AI‑assisted coding, explanations, and troubleshooting.

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