r/java is a subreddit with 398k members. The most common kinds of discussions are solution requests and self-promotion, and the community frequently discusses java, looking, spring, struggling, and performance, and they frequently recommend/review java ide, code editor, and game engines.
News, Technical discussions, research papers and assorted things of interest related to the Java programming language
NO programming help, NO learning Java related questions, NO installing or downloading Java questions, NO JVM languages - Exclusively Java
Popular Themes in r/java
#1
Solution Requests
: "Floci — Run AWS services locally for your Java projects — natively compiled, free and open-source"
4 posts
#2
Self-Promotion
: "I built an engine that auto-visualizes Java algorithms as they run"
3 posts
#3
Advice Requests
: "Have you ever used WebAssembly in your Java project?"
2 posts
#4
Ideas
: "G1 GC Throughput Improvements: 5-15% Performance Gains with Dual Card Tables"
2 posts
#5
Pain & Anger
: "Microservices Job Hell"
1 post
#6
Money Talk
: "Are old Java Developer Journals or Dr. Dobbs mags worth anything?"
1 post
#7
Opportunities
: "What cool projects are you working on? [May 2026]"
1 post
Popular Topics in r/java
#1
Java
: "1-Month Java Trip: Hidden Gems"
287 posts
#2
Looking
43 posts
#3
Spring
: "Ran Spring Boot and Node.js side-by-side in prod for 18 months. Sharing the actual numbers."
26 posts
#4
Struggling
: "Made Minecraft in the Terminal (only java, no extra libs)"
11 posts
#5
Performance
: "Java 18 to 25 Performance benchmark"
10 posts
#6
Library
: "idempotency4j - Java/Spring Boot Idempotency Library"
9 posts
#7
Project
8 posts
#8
Release
: "Java 26 Released today!"
7 posts
#9
Ai
7 posts
#10
Tool
: "Turning an OpenAPI spec into a few thousand fuzz payloads, a Java Tool I built"
6 posts
Products Discussed in r/java
Java Ide
40 reviews
#1
JetBrains
4.6★ from 25 reviews
#2
Apache
4.0★ from 5 reviews
#3
Eclipse Foundation
3.8★ from 5 reviews
Code Editor
21 reviews
#1
IntelliJ IDEA
4.0★ from 6 reviews
#2
Cursor
4.6★ from 5 reviews
#3
GitHub Copilot
5.0★ from 2 reviews
Game Engines
4 reviews
#1
LibGDX
5.0★ from 2 reviews
#2
PlayN
4.0★ from 1 review
#3
jMonkeyEngine
3.0★ from 1 review
Member Growth in r/java
Yearly
+31k members(8.5%)
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About
GummySearch helps people research Reddit communities by organizing activity, growth, themes, and post-level signals into one place.
This page gives a focused view of r/java, including current member size, discussion patterns, product reviews, and related communities to explore.
This data is synced periodically so insights stay current and useful for ongoing research.
Last updated: June 22, 2026