Modern Java 25

Shrink your heap by up to 20% and drastically cut startup times with Java 25's new JVM optimizations.

#1about 2 minutes

Understanding the scope of changes in Java 25

Java 25 introduces updates beyond the language, including libraries, APIs, and the JVM, categorized by feature status like preview or final.

#2about 3 minutes

Using primitive types in pattern matching switches

Java 25 now supports primitive types like integers directly within switch expressions and `instanceof` checks, simplifying type-based logic.

#3about 2 minutes

Introducing stable values for deferred immutability

The new stable values API provides true immutability and deferred initialization, improving application startup times and enabling JVM optimizations.

#4about 3 minutes

Simplifying thread management with structured concurrency

Structured concurrency treats groups of concurrent tasks as a single unit, automatically managing their lifecycle and simplifying error handling.

#5about 2 minutes

Using scoped values as a modern ThreadLocal alternative

Scoped values provide an immutable and efficient way to share data within a thread's call stack, replacing the problematic `ThreadLocal` API.

#6about 2 minutes

Simplifying code with module import declarations

Instead of importing individual classes, you can now import entire modules, making code easier to write and read for newcomers.

#7about 2 minutes

Making Java more accessible with simplified main methods

The `main` method syntax is now more flexible, allowing the removal of `public`, `static`, and even the surrounding class for simpler programs.

#8about 1 minute

Gaining control with flexible constructor bodies

The `super()` call is no longer required to be the first statement in a constructor, enabling pre-initialization validation and logic.

#9about 1 minute

Accelerating computations with the Vector API

The Vector API provides a platform-agnostic way to express vector calculations that compile to optimal SIMD hardware instructions for high performance.

#10about 1 minute

Standardizing cryptographic object encoding

A new API standardizes the encoding and decoding of cryptographic objects, ensuring consistent and secure handling across the ecosystem.

#11about 2 minutes

Preparing for post-quantum cryptography

New APIs for Key Encapsulation Mechanisms (KEM) and Key Derivation Functions (KDF) help protect today's encrypted data from future quantum computing threats.

#12about 4 minutes