Update (October 1, 2026):
Java 23 was released in September 2026 as the latest long-term support (LTS) version.
Main features of Java 23 include:
- Enhanced Virtual Threads: Improved concurrency management for high-performance applications.
- Record Patterns: Simplified data-oriented programming.
- Advanced Performance: Further optimized just-in-time compilation.
Though Java 23 offers tempting new features, Java 17 and 21 remain reliable options due to their ongoing support.
LTS for Java 17 continues through September 2030, making it a stable choice for most enterprises.
Update (September 2025):
Java 21, released in September 2023, quickly became a popular choice due to virtual threads, pattern matching, and other advanced features.
Many applications are migrating from Java 11 and 8 to newer versions like 17 or 21 for improved security and performance.
Here's why you might consider upgrading to Java 21:
- The migration is streamlined with tools like Docker, leveraging the latest features with minimal hassle.
- Java 21, being an LTS version, offers a stable platform for future applications.
- Exciting features such as newer APIs and enhancements which can provide tangible improvements for enterprise applications.
Even as we approach 2027, Java 11 is still widely used and supported, but newer versions offer compelling advantages.
Preface: Versions vs Editions
When downloading Java, you have options like "Java SE 17" or "Java EE 8". The numbers indicate version, while the letters denote the edition. Common editions include:
Standard Edition (SE)
This core edition includes essential libraries and APIs. It's typically the best starting point for developers new to Java.
Enterprise Edition (EE)
EE expands on SE with additional libraries for building large-scale enterprise applications, focusing on distributed and fault-tolerant environments.
EE is suitable for extensive business applications but may be overkill for beginners or smaller projects.
Micro Edition (ME)
ME provides a streamlined version of SE for mobile development, with specific libraries geared towards mobile applications.
Which Version of Java Should I Use?
The following versions of Java are widely recognized and utilized:
Java 8
Java 8, released in 2014, introduced significant updates like lambda expressions and a new DATE/TIME API. It's still in use, but newer versions offer better support.
Java 11
Released in September 2018, Java 11 remains popular due to its LTS and extensive adoption, although its support will start phasing out as newer LTS versions become standard.
Java 17
Java 17, released in September 2021, offers performance and security upgrades promoting it as the go-to choice for new projects.
Oracle JDK vs OpenJDK
What is the Oracle JDK?
The Oracle JDK is comprehensive, offering tools to both run and develop Java applications.
What is the OpenJDK?
OpenJDK provides a free, open-source version of the standard Java SE.
Key differences between the Oracle JDK and OpenJDK
Key differences persist, mainly in licensing and vendor-specific modifications:
- Licensing: Oracle JDK might require a commercial license, offering additional services versus the fully open-source OpenJDK.
- Purpose: Different vendors may tailor OpenJDK with enhancements, contributing to diverse implementations.
Both originate from the same codebase, with vendor enhancements the main distinction.
Additional Notes
Developer Version vs Product Version
The output from java -version might display "java version \"11.0.16"", with "11" wording referring to the product's broader version.
JDK vs JVM vs JRE
The Java Runtime Environment (JRE) assists in running applications, unlike the Java Developer Kit (JDK), which is needed for development tasks and includes additional debugging tools.
Conclusion
If you're beginning with Java or maintaining legacy systems, Java SE 17 or 21 are currently your best choices, offering comprehensive support for essential tasks. While you may encounter older versions like Java 8 in existing systems, newer LTS versions provide better support and features aligned with current development practices.
FAQ
What are the main versions of Java I should consider?
As of 2026, Java 17, 21, and 23 are your main options, with 17 and 23 offering long-term support.
How often are new versions of Java released?
Oracle typically releases new versions every six months, with LTS versions every two years.
Do I need the JDK or just the JRE to run Java applications?
The JRE is sufficient for running applications, while the JDK is necessary for developing them.
