JEP 361

GPTKB entity

Statements (557)

Predicate	Object
gptkbp:instance_of	gptkb:Java_2_Platform gptkb:JEP
gptkbp:abstract	This JEP proposes to allow the use of the local-variable syntax for lambda parameters.
gptkbp:addresses	user feedback on documentation memory allocation issues
gptkbp:advances	Java documentation standards
gptkbp:affects	Java developers
gptkbp:aims_to	Simplify type checks Improve observability of Java applications. enhance the quality of JDK documentation improve observability
gptkbp:aims_to_improve	gptkb:Z_Garbage_Collector memory fragmentation documentation errors predictable release cadence
gptkbp:approves	March 2018 March 2021 JDK Release Team JDK Release Team.
gptkbp:author	gptkb:Brian_Goetz gptkb:Maurizio_Cimadamore
gptkbp:benefits	Improves code readability and reduces boilerplate. Better performance monitoring. Enhanced diagnostics. Reduced overhead. Encourages a more declarative style of programming. Reduces verbosity.
gptkbp:challenges	Requires careful design to avoid complexity.
gptkbp:code	(var s) -> s.length()
gptkbp:collaborated_with	gptkb:Open_JDK_community academic institutions open-source projects Research institutions. Industry partners. Open source projects.
gptkbp:collaboration	Java developers Java community stakeholders
gptkbp:collaborative_projects	multiple stakeholders
gptkbp:community_feedback	Positive. Positive reception from the Java community.
gptkbp:community_involvement	High.
gptkbp:compatibility	Backward compatible with existing Java code. Backward compatible.
gptkbp:concluded_on	March 2019 The proposal was accepted and implemented.
gptkbp:contains	API changes Security updates Deprecations Removals Removed features
gptkbp:context	Lambda expressions.
gptkbp:contributes_to	Java observability tools Java observability.
gptkbp:contribution	Enhances lambda syntax.
gptkbp:contribution_to_readability	Improves readability.
gptkbp:created	2017-07-10
gptkbp:date_accepted	March 2018
gptkbp:describes	gptkb:Pattern_Matching_for_instanceof JDK 15 Release Notes JDK 17 Release Notes documentation improvements in JDK 11 JDK 17 Release Schedule
gptkbp:description	Introduces the 'var' keyword for local variable type inference. Introduces switch expressions to enhance the switch statement. Enhances the switch statement to allow it to be used as an expression. Introduces sealed interfaces to the Java programming language. Enhances Java Flight Recorder to support event streaming.
gptkbp:development	September 2018
gptkbp:discusses	https://openjdk.java.net/jeps/361
gptkbp:educational_resources	Available online.
gptkbp:enables	event filtering real-time monitoring Real-time monitoring. Null-safe type checks
gptkbp:enhances	gptkb:Java_programming_language performance analysis developer experience Java Flight Recorder. API documentation readability the overall Java ecosystem. release predictability concurrent memory management
gptkbp:example	var stream = list.stream(); (var x) -> x + 1 switch (day) { case MONDAY: ... } var list = new Array List< String>(); var map = new Hash Map< String, List< String>>(); var optional = Optional.of Nullable(value); var result = compute(); switch (value) { case 1 -> ' One'; case 2 -> ' Two'; } String result = switch (day) { case MONDAY -> " Start of the week"; } Sealed interfaces can be used in pattern matching. switch (value) { case 1 -> ' One'; case 2 -> ' Two'; case 3 -> ' Three'; case 4 -> ' Four'; case 5 -> ' Five'; } switch (value) { case 1 -> ' One'; case 2 -> ' Two'; default -> ' Unknown'; } switch (value) { case 1 -> ' One'; case 2 -> ' Two'; case 3 -> ' Three'; case 4 -> ' Four'; case 5 -> ' Five'; case 6 -> ' Six'; case 7 -> ' Seven'; } switch (value) { case 1 -> ' One'; case 2 -> ' Two'; case 3 -> ' Three'; case 4 -> ' Four'; case 5 -> ' Five'; case 6 -> ' Six'; } switch (value) { case 1 -> ' One'; case 2 -> ' Two'; case 3 -> ' Three'; case 4 -> ' Four'; case 5 -> { /* action / yield ' Five'; } } switch (value) { case 1 -> { / action / yield ' One'; } case 2 -> { / action / yield ' Two'; } case 3 -> { / action / yield ' Three'; } } switch (value) { case 1: yield ' One'; case 2: yield ' Two'; } switch (value) { case 1 -> { / action / yield ' One'; } } switch (value) { case 1 -> ' One'; case 2 -> ' Two'; case 3 -> ' Three'; case 4 -> ' Four'; default -> ' Unknown'; } switch (value) { case 1 -> ' One'; case 2 -> ' Two'; case 3 -> ' Three'; case 4 -> { / action / yield ' Four'; } } switch (value) { case 1 -> ' One'; case 2 -> ' Two'; case 3 -> ' Three'; default -> ' Unknown'; } switch (value) { case 1 -> ' One'; case 2 -> ' Two'; case 3 -> ' Three'; case 4 -> ' Four'; case 5 -> ' Five'; default -> ' Unknown'; } switch (value) { case 1 -> { yield ' One'; } } switch (value) { case 1, 2: yield ' One or Two'; } switch (value) { case 1: yield ' One'; } switch (value) { case null: yield ' Null'; } switch (value) { default: yield ' Default'; } switch (value) { case 1 -> ' One'; case 2 -> ' Two'; default -> ' Other'; } switch (value) { case 1 -> ' One'; case 2 -> ' Two'; case 3 -> ' Three'; case 4 -> ' Four'; case 5 -> ' Five'; case 6 -> ' Six'; default -> ' Unknown'; } switch (value) { case 1 -> ' One'; case 2 -> ' Two'; case 3 -> ' Three'; } switch (value) { case 1 -> ' One'; case 2 -> ' Two'; case 3 -> ' Three'; case 4 -> ' Four'; case 5 -> ' Five'; case 6 -> { / action / yield ' Six'; } } switch (value) { case 1 -> { / code / yield ' One'; } } switch (value) { case 1 -> { / action / yield ' One'; } case 2 -> ' Two'; } switch (value) { case 1 -> ' One'; case 2 -> ' Two'; case 3 -> ' Three'; case 4 -> ' Four'; } switch (value) { case 1 -> ' One'; case 2 -> ' Two'; case 3 -> ' Three'; case 4 -> ' Four'; case 5 -> ' Five'; case 6 -> ' Six'; case 7 -> { / action / yield ' Seven'; } } switch (value) { case 1 -> ' One'; case 2 -> { / action / yield ' Two'; } } switch (value) { case 1 -> ' One'; case 2 -> ' Two'; case 3 -> ' Three'; case 4 -> ' Four'; case 5 -> ' Five'; case 6 -> ' Six'; case 7 -> ' Seven'; default -> ' Unknown'; } switch (value) { case 1 -> { / action / yield ' One'; } case 2 -> { / action */ yield ' Two'; } }
gptkbp:example_lambda	(var a, var b) -> a + b
gptkbp:facilitates	Data analysis. data collection
gptkbp:feature	Allows switch to return a value. Enables the use of yield statement. Supports multiple case labels.
gptkbp:features	Type inference.
gptkbp:feedback_mechanism	Open discussion forums.
gptkbp:first_published	2020-03-17
gptkbp:focus	gptkb:Garbage_Collection
gptkbp:formulation	Allows var in lambda parameters.
gptkbp:future_prospects	Potential enhancements based on user feedback. No further work planned.
gptkbp:has_version	Introduced in Java 11.
gptkbp:historical_achievement	Java's documentation evolution Java SE development
https://www.w3.org/2000/01/rdf-schema#label	JEP 361
gptkbp:impact	No impact on existing code. Simplifies code by reducing verbosity. Improves code readability and reduces boilerplate. Improves type safety and maintainability. Affects existing switch statements.
gptkbp:improves	Code readability application responsiveness application performance monitoring documentation generation tools search functionality in documentation Application performance.
gptkbp:includes	Bug fixes New features Performance improvements release candidate support for HTML5 improved navigation features feature freeze date memory management adjustments final release date ramp-down period
gptkbp:introduced	new syntax for documentation comments
gptkbp:introduced_in	gptkb:JDK_17 gptkb:Java_11 gptkb:Java_16 gptkb:JDK_11 gptkb:JDK_12
gptkbp:is_a	gptkb:Java_2_Platform
gptkbp:is_a_document_that	release milestones JDK 17 release phases JDK 17 release process a roadmap for JDK 17 release schedule details
gptkbp:is_a_document_that_outlines_the_importance_of	release schedules in Java development
gptkbp:is_a_document_that_provides_guidance_on	JDK 17 release planning
gptkbp:is_a_document_that_serves_as_a_reference_for	JDK 17 release stakeholders
gptkbp:is_a_document_that_specifies	JDK 17 release phases
gptkbp:is_a_foundational_change_for	Java documentation practices
gptkbp:is_a_framework_for	JDK development
gptkbp:is_a_guide_for	future JDK releases JDK 17 development process
gptkbp:is_a_key_component_of	JDK 11 features
gptkbp:is_a_proposal_that_aims_to_clarify	JDK release expectations
gptkbp:is_a_proposal_that_aims_to_enhance	Java release management
gptkbp:is_a_proposal_that_aims_to_ensure	JDK release consistency
gptkbp:is_a_proposal_that_aims_to_facilitate	JDK release coordination
gptkbp:is_a_proposal_that_aims_to_improve	JDK release transparency
gptkbp:is_a_proposal_that_aims_to_standardize	JDK release cycles
gptkbp:is_a_proposal_that_includes	release timelines
gptkbp:is_a_proposal_that_outlines	JDK 17 release strategy
gptkbp:is_a_reference_for	JDK release schedules
gptkbp:is_adopted_by	gptkb:developers gptkb:Non-profit_organizations gptkb:Java_frameworks gptkb:educational_institutions gptkb:Open_JDK Financial institutions Healthcare organizations Research institutions Open-source projects Startups Software companies Media companies data analysis enterprise applications cloud environments real-time analytics software companies startups Freelancers Manufacturing companies Telecommunications companies Consulting firms Transportation companies Energy companies Startups. Government organizations Gaming companies Retail companies Cloud environments. Enterprise applications. Large enterprises. High among developers. Widely adopted in Java 11.
gptkbp:is_aimed_at	Java developers enhancing developer productivity
gptkbp:is_aligned_with	modern software development practices Industry standards. Java community standards
gptkbp:is_analyzed_in	Research papers technical papers software architects Data scientists.
gptkbp:is_associated_with	gptkb:Java_SE_17
gptkbp:is_beneficial_for	gptkb:developers IT professionals system administrators Code maintainability application developers
gptkbp:is_cited_in	Industry reports. Research articles. Java books
gptkbp:is_compatible_with	Java applications Microservices.
gptkbp:is_considered	Java 18 features future Java versions
gptkbp:is_described_as	Technical articles Java documentation Java tutorials
gptkbp:is_designed_for	Java applications
gptkbp:is_designed_to	support diverse user needs facilitate learning for new developers improve onboarding for new developers
gptkbp:is_discussed_in	gptkb:Java_Community_Process Developer conferences Java experts Java meetups Online communities. Conferences. Technical blogs technical blogs technical webinars Technical forums. Meetups. Java forums
gptkbp:is_documented_in	gptkb:Java_community Java SE documentation Java documentation Official JDK documentation Open JDK documentation Open JDK website JDK Enhancement-Proposal repository Open JDK documentation. Java Enhancement Proposal documents JEP 361 documentation
gptkbp:is_enhanced_by	community contributions Community contributions.
gptkbp:is_evaluated_by	industry experts real-world scenarios Software engineers performance benchmarks Code reviews Performance metrics. Performance benchmarks. Performance engineers. Benchmarks.
gptkbp:is_expected_to	improve throughput better community contributions future JDK documentation proposals increase documentation usage
gptkbp:is_explored_in	Java tutorials Java workshops Java courses
gptkbp:is_focused_on	low-latency applications user-friendly documentation
gptkbp:is_implemented_in	gptkb:Java_Virtual_Machine gptkb:Java_programming_language gptkb:JDK_11 gptkb:Open_JDK Java developers Implemented in the Java compiler. Part of the Java language specification. Completed. Java 11 and later versions Open JDK. Java Virtual Machine. JDK 11 release Open JDK 17 Compiler changes.
gptkbp:is_influenced_by	gptkb:JEP_290 Functional programming concepts community feedback user experience research Type inference previous JEPs
gptkbp:is_integrated_with	gptkb:Java_frameworks gptkb:cloud_services Development environments. Java build tools Cloud platforms. Java monitoring solutions Monitoring tools.
gptkbp:is_linked_to	Java memory model JDK release process
gptkbp:is_managed_by	gptkb:Open_JDK_community gptkb:Open_JDK_Community
gptkbp:is_motivated_by	To improve the expressiveness of the Java language. To provide more control over the inheritance of interfaces. To improve the readability and consistency of lambda expressions.
gptkbp:is_part_of	gptkb:Java_SE_11 gptkb:Java_SE_Platform gptkb:Java_2_Platform gptkb:JDK_11 gptkb:Java_ecosystem gptkb:Java_Development_Kit_(JDK) Java language evolution Java platform evolution Java runtime environment Java ecosystem. Java standard library Java 17 features Java performance improvements Java language enhancements Java's strategic goals Java SE Platform. Java's commitment to quality Java's ongoing improvement process Java performance optimization. JDK release planning Java SE release strategy Java development lifecycle. Java SE 16 features Java SE platform evolution Java SE 17 planning
gptkbp:is_promoted_by	gptkb:Oracle Java community events Java user groups Java blogs Java user groups.
gptkbp:is_promoted_through	gptkb:Java_conferences Webinars Workshops. Newsletters. Social media. Webinars. Java newsletters Java podcasts
gptkbp:is_recognized_by	Industry leaders. Java developers.
gptkbp:is_recognized_for	its innovative approach to documentation
gptkbp:is_referenced_in	Online tutorials Java developers Java specifications Java standards Technical documentation. Technical papers. Java books
gptkbp:is_reflected_in	community priorities in Java development
gptkbp:is_related_to	gptkb:JEP_411 gptkb:JEP_330 gptkb:JEP_382 gptkb:JEP_384 gptkb:JEP_391 gptkb:JEP_394 gptkb:JEP_260 gptkb:Java_2_Platform gptkb:JEP_305 gptkb:ZGC performance tuning Performance tuning. memory management strategies JDK 17 features JFR (Java Flight Recorder) Garbage Collection algorithms
gptkbp:is_reviewed_by	gptkb:Java_Community_Process Technical committees peer reviewers Peer reviewers. software engineering journals
gptkbp:is_supported_by	gptkb:Open_JDK_community gptkb:multiple_platforms gptkb:Java_community gptkb:Java_libraries Multiple platforms Community contributions Java developers IDE plugins Java IDEs Java runtime environment Java user groups Community forums. Technical support. Documentation. Java certification programs Java user community Java community. Various operating systems. User guides.
gptkbp:is_targeted_at	large heap applications
gptkbp:is_tested_for	Unit tests quality assurance teams production environments Quality assurance. Extensively tested. Load testing. Java testing frameworks Continuous integration.
gptkbp:is_used_for	performance tuning
gptkbp:is_used_in	Cloud services Web applications Mobile applications Enterprise applications production environments Production environments.
gptkbp:is_utilized_by	data scientists monitoring tools Developers. system architects
gptkbp:is_utilized_for	system monitoring debugging purposes application diagnostics Application profiling. Debugging. System monitoring.
gptkbp:is_utilized_in	microservices architecture high-performance applications large-scale applications cloud applications Software development projects Research projects. Academic research.
gptkbp:key	Java performance optimization Java SE 17 release
gptkbp:key_feature	gptkb:Java_11 Improves type safety. Allows multiple case labels to be grouped. Supports yield statement for returning values. Enables switch to be used in a more functional style. Supports pattern matching. Allows interfaces to restrict which classes can implement them. Local-variable type inference. Allows null case handling.
gptkbp:keywords	var, type inference, local variable
gptkbp:language	Java programming language.
gptkbp:latest_version	gptkb:Java_11 gptkb:Java_SE_14 1.0 JEP 361 (2020)
gptkbp:originated_in	more accessible documentation
gptkbp:outlines	JDK 17 feature timelines JDK 17 timeline
gptkbp:performance	No significant impact.
gptkbp:plot_summary	Enhancements and changes in JDK 17. Sealed interfaces provide a way to control the implementation of interfaces. Local-variable syntax for lambda parameters improves Java's lambda expressions.
gptkbp:presented_by	gptkb:Java_conferences
gptkbp:proposed_by	gptkb:Brian_Goetz gptkb:Oracle gptkb:Oracle_Corporation JDK community new documentation tools streamline JDK releases
gptkbp:provides	better performance event streaming capabilities better examples in documentation API for event streaming Real-time event streaming capabilities. timeline for JDK 17 Type-safe casting
gptkbp:published_by	Java magazines.
gptkbp:published_in	September 2020 September 2021 September 2018.
gptkbp:reduces	pause times
gptkbp:related_concept	Java SE. Sealed classes.
gptkbp:related_jdk	gptkb:JDK_11
gptkbp:related_jeps	gptkb:JEP_286 gptkb:JEP_394 gptkb:JEP_12 gptkb:JEP_409
gptkbp:related_to	gptkb:JEP_330 gptkb:JEP_344 gptkb:Java_SE_17 gptkb:Java_Flight_Recorder gptkb:JEP_12 gptkb:JEP_290 gptkb:JEP_326 gptkb:Java_SE_15
gptkbp:release_date	September 2021
gptkbp:released	gptkb:JDK_17 gptkb:Java_SE_10
gptkbp:replaces	Traditional instanceof checks
gptkbp:requires	JDK 17 or later JDK 16 or later JDK 11 or later JDK 11 or later. Java Development Kit (JDK) 16 or later
gptkbp:reviews	gptkb:Brian_Goetz gptkb:Venkat_Subramaniam gptkb:Mark_Reinhold Completed. Community review. Various members of the Java community.
gptkbp:specification	gptkb:Java_Language_Specification Java Language Specification.
gptkbp:specifies	gptkb:Java_Flight_Recorder
gptkbp:status	gptkb:Final Standard Feature Targeted for JDK 17
gptkbp:strategic_goals	gptkb:Java_2_Platform
gptkbp:supports	modern web standards Event-driven architectures. event consumers
gptkbp:target_audience	Java developers.
gptkbp:target_jdk	gptkb:JDK_17 gptkb:JDK_11 gptkb:JDK_12 gptkb:JDK_15
gptkbp:title	gptkb:JFR:_Event_Streaming gptkb:JFR_Event_Streaming Java SE 9: Local-Variable Type Inference Local-Variable Syntax for Lambda Parameters Sealed Interfaces Switch Expressions (Standard Feature) ZGC: Concurrent Memory Management Adjustments Switch Expressions (Standard Feature Preview)
gptkbp:updates	2018-03-20
gptkbp:usage	Used in Java programming.
gptkbp:use_case	Frameworks and libraries that require strict type hierarchies.
gptkbp:user_manual	Available in Java documentation.
gptkbp:was_a_response_to	the need for better documentation tools growing complexity of Java APIs
gptkbp:was_a_result_of	community-driven initiatives
gptkbp:year_created	2019-09-17
gptkbp:bfsParent	gptkb:JEP_33 gptkb:JDK_10 gptkb:JDK_14 gptkb:Java_10
gptkbp:bfsLayer	5