Package net.jrodolfo.java_evolution.java21

package net.jrodolfo.java_evolution.java21

Examples for features introduced in Java 21.

Java 21 is an LTS release and a major modern-Java milestone. It finalized virtual threads for scalable blocking code, record patterns for deconstructing data, and pattern matching for switch for type-based dispatch. It also introduced sequenced collections as a final Collections Framework feature, included preview work for unnamed patterns/variables, scoped values, and structured concurrency, and added the Key Encapsulation Mechanism API.

Related Packages

Package	Description
net.jrodolfo.java_evolution
net.jrodolfo.java_evolution.java21.key_encapsulation	Executable examples for the Java 21 Key Encapsulation Mechanism API.
net.jrodolfo.java_evolution.java21.scoped_values	Explains Java 21 Scoped Values as a first preview feature.
net.jrodolfo.java_evolution.java21.structured_concurrency	Explains Java 21 Structured Concurrency as a first preview feature.

Class	Description
PatternMatchingSwitchExamples	Demonstrates pattern matching for switch, finalized in Java 21.
PatternMatchingSwitchExamples.Command	Closed command hierarchy used to demonstrate exhaustive switch handling.
PatternMatchingSwitchExamples.Restart	Restarts a service.
PatternMatchingSwitchExamples.Start	Starts a service.
PatternMatchingSwitchExamples.Stop	Stops a service.
RecordPatternsExamples	Demonstrates record patterns, finalized in Java 21.
RecordPatternsExamples.Point	Point record used by the nested deconstruction example.
RecordPatternsExamples.Rectangle	Rectangle record made of two points.
SequencedCollectionsExamples	Demonstrates sequenced collections, introduced in Java 21.
SequencedCollectionsExamples.MapOrderSummary	Captures direct observations from SequencedMap.
SequencedCollectionsExamples.SequenceSummary	Captures direct observations from SequencedCollection.
SequencedCollectionsExamples.SequenceViewSummary	Captures the state of a collection and its reversed view after a mutation.
UnnamedPatternsVariablesPreviewExamples	Demonstrates unnamed patterns and variables as a Java 21 preview feature.
UnnamedPatternsVariablesPreviewExamples.Line	Line record used by the unnamed record-pattern example.
UnnamedPatternsVariablesPreviewExamples.Point	Point record used by the unnamed record-pattern example.
VirtualThreadsExamples	Demonstrates virtual threads, finalized in Java 21.