Modern Java: This is not your father's Java anymore

Forget complex reactive paradigms. Java 21's virtual threads deliver massive concurrency with a simple, familiar thread-per-request model.

#1about 3 minutes

Creating immutable data carriers with Java records

Records provide a concise syntax for creating immutable data classes, automatically generating constructors, accessors, equals, and hashCode.

#2about 2 minutes

Controlling class inheritance with sealed classes

Sealed classes and interfaces restrict which other classes or interfaces may extend or implement them, offering more control than final or public.

#3about 5 minutes

Leveraging pattern matching for switches and records

Pattern matching simplifies complex conditional logic by combining type checks and variable extraction within switch expressions and instanceof checks.

#4about 4 minutes

Understanding the new virtual threads model

Virtual threads are lightweight, JVM-managed threads that dramatically increase scalability for concurrent applications without complex reactive code.

#5about 2 minutes

Managing concurrent tasks with structured concurrency

Structured concurrency simplifies multithreaded programming by treating groups of related tasks running in different threads as a single unit of work.

#6about 1 minute

Replacing thread locals with safer scoped values

Scoped values offer an improved way to share immutable data within and across threads for a limited scope, avoiding the pitfalls of thread locals.

#7about 2 minutes

Simplifying Java entry points for new developers

Java now allows for simpler main method declarations and unnamed classes, lowering the barrier to entry for writing basic programs.

#8about 2 minutes

Decluttering code with unnamed variables and patterns

Use the underscore character for unnamed variables and patterns to signify intentionally unused variables, improving code clarity.

#9about 1 minute

Introducing new methods for sequence collections

The new sequenced collection interface adds standardized methods like getFirst, getLast, and reversed to collections with a defined encounter order.

#10about 2 minutes

Using string templates for safer interpolation

String templates provide a more powerful and secure way to perform string interpolation by using template processors like STR and FMT.

#11about 4 minutes

Applying data-oriented programming principles in Java

Combine records, sealed classes, and pattern matching to implement data-oriented programming, where application logic is driven by the structure of the data itself.