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1Z0-830 Java SE 21 Developer Certification Prep | JavaInUse

1Z0-830 Java SE 21 Developer - Certification Prep

1Z0-830 Java SE 21 Certification - Table of Contents

Master all exam topics with comprehensive study guides and practice examples.

Data Types Primitives, wrappers, strings, var Control Flow If/else, switch, loops, assertions OOP Concepts Classes, inheritance, records, sealed Exception Handling Try-catch, multi-catch, try-with-resources Collections List, Set, Map, Queue, Sequenced Streams & Lambdas Functional interfaces, Stream API, Optional Modules & Packaging JPMS, services, migration Concurrency Threads, executors, virtual threads I/O & NIO.2 Files, streams, serialization JDBC Connections, statements, transactions Localization Locale, ResourceBundle, formatting New Features Java 8-21 enhancements

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