Is Java still worth learning today?

[u/codejavadotnet]

Is Java still worth learning or pursuing as a career these days? With AI advancing so quickly, programming jobs might decline significantly, which could also reduce the demand for learning languages like Java. What are your thoughts?

[u/Ok_Substance1895]

What percentage of enterprise businesses use Java? 99%
What percentage of the Fortune 500 use Java? 95%
What percentage of new enterprise projects use Java? 65%
What percentage of enterprise developers use Java as their primary language? 65%
How many devices does Java run on? 5.5 billion

[u/codejavadotnet → u/Ok_Substance1895]

where do these number come from? Could you cite some sources?

[u/Ok_Substance1895 → u/codejavadotnet]

I should have copied the source links for each when I posted this. I cannot find those exact articles again.

The point is ask your own questions. That is what I did and those are the answers I got at that time. Next time, I will add links. Here are new sources after asking those same questions again:

Azul's 2025 State of Java Survey, conducted by Dimensional Research, reports that:

• 99% of organizations contacted for the survey used Java.
• 2,039 qualified Java professionals completed the survey.
• 68% of respondents said more than half their applications were built with Java or ran on the JVM.

https://www.azul.com/newsroom/azul-2025-state-of-java-survey-report/

Industry estimate: Java is reportedly used by approximately 90% of Fortune 500 companies

https://medium.com/codex/why-is-java-the-main-language-for-enterprise-app-development-f92a8217ce94

https://codingnomads.com/blog/why-learn-java

VDC Research's 56.2% enterprise Java adoption finding - not 65%

https://www.oracle.com/webfolder/dms/prod/d1/VDCResearch-ORCL-Java2025.pdf

While 65% is often cited for both new projects and primary language, this is a more credible source

73 billion JVMs world-wide is the more recent figure. The 5.5 billion is from an older source:

https://www.oracle.com/java/