Java 25

☕ Java 25: The Next Frontier

Release Date: September 2025 | LTS: Yes | Status: 🚀 Latest LTS

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📋 Table of Contents

1. Overview
2. Core Features
3. Code Examples
4. Best Practices
5. Migration Guide

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🎯 Overview

✍️ TODO: Add a summary of what Java 25 focuses on as an LTS release — e.g., which preview features from 21–24 got finalized, and what's newly introduced.

Java 25 is the latest Long-Term Support (LTS) release, following Java 21. As an LTS release, it consolidates and finalizes several preview/incubator features from Java 22–24, alongside new capabilities.

Java 21 (LTS, 2023)  →  Java 22–24 (interim)  →  Java 25 (LTS, 2025)
      │                        │                          │
      ├─ Virtual Threads       ├─ Preview features         ├─ ??? (fill in)
      ├─ Pattern Matching      ├─ Foreign Function API      ├─ ???
      └─ Record Patterns       └─ ...                       └─ ???

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🚀 Core Features

✍️ Add each finalized/new Java 25 feature below. Use this template per feature so it stays consistent with the rest of the guide series (see Java 8 Guide and Java 21 Guide for the format).

1️⃣ [Feature Name]

What: One-line description of the feature and the problem it solves.

Status: Preview / Standard / Finalized (from JEP ###)

// Before Java 25
// ...

// With Java 25
// ...

Why it matters: Brief explanation of the real-world benefit (performance, readability, safety, etc.)

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2️⃣ [Feature Name]

What: ...

// Code example

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3️⃣ [Feature Name]

What: ...

// Code example

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💻 Code Examples

✍️ Add runnable example classes here, matching the project structure convention: src/main/java/java25/<FeatureName>Example.java

package java25;

public class NewFeatureExample {
    public static void main(String[] args) {
        // TODO: demonstrate the feature
    }
}

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💡 Best Practices

✍️ Add do's/don'ts once features are finalized, following the style used in the Java 8 guide.

✅ Do's

• TODO

❌ Don'ts

• TODO

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🔧 Performance Considerations

✍️ Note any JVM/runtime performance changes specific to Java 25 (e.g., GC updates, startup time, virtual thread scheduler improvements).

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🔄 Migration Guide

Upgrading from Java 21 (LTS) to Java 25 (LTS)

# Using SDKMAN
sdk install java 25-tem
sdk use java 25-tem

# Verify
java -version

Checklist:

• Update pom.xml / build.gradle source/target compatibility to 25
• Review deprecated/removed APIs between 21 → 25
• Re-run test suite against the new JVM
• Check third-party library compatibility (Spring Boot, etc.)
• Review any preview features you were using in 21–24 — confirm they're finalized or update accordingly

✍️ Fill in specific breaking changes / deprecations once confirmed.

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🎓 Takeaways

✍️ Summarize the 3–5 biggest wins of Java 25 once the feature list is finalized.

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🔗 Related Guides

• ⬅️ Java 21 (Previous LTS) — Virtual Threads, Pattern Matching, Record Patterns
• ⬅️ Java 8 Fundamentals — Where it all started
• 🏠 Back to Main Guide

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⬅️ Back to Main Guide

Made with ☕ by Neelu Sahai — feature details to be added as Java 25 rolls out.