159 posts analyzed Updated Sep 2026
Averages 5 posts/day, top 50% activity. Most active Fridays around 9 AM UTC. Mostly link posts.
r/java Traffic & Engagement r/java Traffic & Engagement
Volume and engagement over time Posting volume and engagement over time
Post Format
Upvote Distribution
How upvoted posts perform Only posts with 2+ upvotes. The bands below show how those posts are spread by upvote count.
r/java Most Active Times When r/java Is Most Active
Peak posting by day and hour (UTC) When this community posts most, by day and hour (UTC)
Most Active by Day
r/java Flair Performance r/java Flair Performance
Upvotes and volume by flair Average upvotes and post volume by flair
This subreddit doesn't use post flairs.
No flaired posts were found in this month's data.
Post Type Breakdown
Share by text, image, or link Share of posts by format: text, image, or link
r/java Trending Keywords Trending Keywords in r/java
Ranked by how often they appear Title keywords ranked by how often they appear
| Keyword | Mentions ▼ | Upvotes | Comments |
|---|---|---|---|
| java | 69 (43.4%) | 27 | 12 |
| spring | 16 (10.1%) | 23 | 10 |
| built | 15 (9.4%) | 19 | 6 |
| jdk | 14 (8.8%) | 46 | 7 |
| code | 10 (6.3%) | 36 | 16 |
| jvm | 10 (6.3%) | 26 | 12 |
r/java Mentioned Domains Mentioned Domains in r/java
Most linked sites Most linked sites in this subreddit
| Domain | Links | Upvotes |
|---|---|---|
| github.com | 15 | 24 |
| youtube.com | 5 | 38 |
| inside.java | 3 | 95 |
| openjdk.org | 3 | 64 |
r/java Top Posts Top Performing Posts in r/java
Highest-performing posts Highest-performing posts. Each title links to Reddit.
Performance Improvements in JDK 27
Principles of Memory Management in Java
An open-source AI inference engine built for the JVM. AI for Java, in Java. Finally, AI in jar.
webforJ: a Java framework for full-stack browser applications
Java 27 / JDK 27: General Availability
New candidate JEP: 544: Ahead-of-Time Code Compilation
I built an IntelliJ plugin that shows where Java code performs I/O
JEP targeted to JDK 28: 401: Value Objects (Preview)
Eclipse 2026-09 (4.41) Released!
I’ve maintained the same Java ETL tool for 20 years. I think it still fits one narrow gap.
| Title | Upvotes | Comments | Type | Date |
|---|---|---|---|---|
| Performance Improvements in JDK 27 | 140 | 7 | link | Sep 28 |
| Principles of Memory Management in Java | 109 | 42 | link | Sep 4 |
| An open-source AI inference engine built for the JVM. AI for Java, in Java. Finally, AI in jar. | 109 | 22 | text | Sep 17 |
| webforJ: a Java framework for full-stack browser applications | 101 | 21 | image | Sep 18 |
| Java 27 / JDK 27: General Availability | 95 | 1 | link | Sep 15 |
| New candidate JEP: 544: Ahead-of-Time Code Compilation | 93 | 26 | link | Sep 10 |
| I built an IntelliJ plugin that shows where Java code performs I/O | 85 | 14 | image | Sep 1 |
| JEP targeted to JDK 28: 401: Value Objects (Preview) | 85 | 21 | link | Sep 20 |
| Eclipse 2026-09 (4.41) Released! | 81 | 30 | text | Sep 11 |
| I’ve maintained the same Java ETL tool for 20 years. I think it still fits one narrow gap. | 81 | 16 | text | Sep 9 |
r/java Audience Overlap r/java Subreddit Overlap & Related Communities
Overlapping audiences Communities with overlapping audiences
r/java FAQ Frequently Asked Questions About r/java
What's the best time to post on r/java?
Based on posting volume, r/java is most active on Fridays around 9 AM UTC. That window has the most community activity, but busier hours also mean more competition for attention.
How active is r/java?
r/java averages 5 posts per day and ranks in the top 50% for activity among tracked SFW subreddits.
How many upvotes do posts on r/java get?
Posts on r/java average about 22 upvotes this month (net score per post).
What kind of posts does r/java get most?
On r/java, posts are a mix of formats, mostly link posts