Which version of Eclipse is compatible with JDK 25?

As Java continues to evolve, developers constantly need to keep their IDEs up to date to take advantage of the newest features, APIs, and compiler optimizations. With the release of Java SE 25 (JDK 25), many developers are asking one key question: Which version of Eclipse supports JDK 25?

If you’re wondering whether your current Eclipse setup can handle the latest JDK release—or if you need to upgrade—this guide explains everything you need to know.

We’ll walk through Eclipse compatibility, how to add Java 25 support, and the best setup recommendations for a smooth experience on Windows 11 and beyond.

Understanding Eclipse and Java Compatibility

The Eclipse IDE releases updates on a quarterly schedule (e.g., 2025-03, 2025-06, 2025-09). Each release brings support for newer Java versions through updates in the Eclipse Compiler for Java (ECJ) and the JDT (Java Development Tools) plugin.

Historically, Eclipse provides early access compatibility for each upcoming Java release about one quarter before its official availability. That means, by the time JDK 25 becomes generally available, Eclipse will already have (or will immediately receive) a support patch.

Eclipse Version Compatible With JDK 25

As of 2025, the Eclipse IDE 2025-09 (4.37/R) release is the one designed to fully support JDK 25.

Out of the box, Eclipse 2025-09 already includes JDK 24 support and partial support for JDK 25.
Full JDK 25 support (compiler, syntax, and toolchain recognition) is available via a “Java 25 Support for Eclipse 2025-09” add-on from the Eclipse Marketplace.
The Eclipse Foundation also confirmed that complete, built-in support for JDK 25 will arrive by the Eclipse 2025-12 release (the next quarterly update after JDK 25’s GA release).

In simple terms: bUse Eclipse 2025-09 or later to develop with Java 25 safely.

How to Install Eclipse With JDK 25 Support

To ensure your Eclipse setup works perfectly with JDK 25, follow these steps:

1. Install JDK 25

First, download and install the latest Java 25 build (or GA release) from your preferred vendor:

Oracle JDK 25 Download

Once installed, verify it using:

java -version

You should see an output like:

java version "25"
Java(TM) SE Runtime Environment (build 25.x.x)
Java HotSpot(TM) 64-Bit Server VM (build 25.x.x, mixed mode)

2. Install Eclipse IDE 2025-09 (or newer)

Download Eclipse IDE 2025-09 from the official website: https://www.eclipse.org/downloads/

Choose Eclipse IDE for Java Developers or Eclipse IDE for Enterprise Java and Web Developers, depending on your project needs.

During installation, make sure to select a workspace folder that doesn’t contain older Eclipse configurations, to avoid version conflicts.

3. Add Java 25 Support via Eclipse Marketplace

If your Eclipse build doesn’t yet include Java 25 support:

Open Eclipse.
Go to Help → Eclipse Marketplace.
Search for “Java 25 Support for Eclipse 2025-09”.
Click Install, then restart Eclipse when prompted.

This plugin enables full syntax recognition, compiler compliance, and project configuration options for JDK 25.

4. Configure JDK 25 in Eclipse

Once both Eclipse and JDK 25 are installed:

Open Eclipse.
Go to Window → Preferences → Java → Installed JREs.
Click Add → Standard VM → Next.
Browse to your JDK 25 installation directory (for example, C:\Program Files\Java\jdk-25).
Select it and click Finish.
Check the box next to the new JDK to make it the default runtime environment.

5. Set Compiler Compliance Level

To ensure your projects compile with the latest Java 25 features:

Go to Project → Properties → Java Compiler.
Check Enable project-specific settings.
Under Compiler compliance level, select 25 (or “Use workspace default” if already set).
Click Apply → OK.

You can now write, build, and run Java 25 code inside Eclipse without any compatibility issues.

Troubleshooting Java 25 Setup in Eclipse

If Eclipse still doesn’t recognize Java 25, try these quick fixes:

Update Eclipse:
Go to Help → Check for Updates to ensure all packages are current.
Rebuild the workspace:
Sometimes, old metadata prevents new JDK detection. Choose File → Restart and rebuild your workspace.
Install ECJ Plugin Update:
Visit the Eclipse Marketplace and update the Eclipse Compiler for Java (ECJ) to the latest release.
Run Eclipse with JDK 25:
Ensure the IDE itself runs on Java 25 (not an older JDK). You can check this via Help → About Eclipse IDE → Installation Details → Configuration.

Why Upgrade to JDK 25?

Java 25 continues Oracle’s six-month release cadence, bringing new features, improved performance, and long-term API enhancements.
Some reasons to upgrade include:

Improved JIT compiler performance and garbage collection.
Enhanced preview features introduced in JDK 24 finalized.
Stronger security and TLS performance improvements.
Future compatibility for frameworks and tools targeting JDK 25+.

Eclipse’s rapid update cycle ensures you can take advantage of these new features with minimal setup work.

Wrapping Up

To use JDK 25 effectively, install Eclipse IDE 2025-09 (4.37) or a newer release.
If full JDK 25 support isn’t included out-of-the-box, simply install the Java 25 Support plugin from the Eclipse Marketplace.

After configuring your JDK and compiler settings, you’ll be ready to explore the newest Java features right inside Eclipse—no errors, no compatibility issues, and no workarounds required.

Stay ahead of the curve—keep your development environment up to date, and enjoy everything JDK 25 brings to modern Java development.