Free Java SE 17 (1Z0-829) Exam Prep

Primitives and wrapper classes with the Math API, parentheses, type promotion and casting; String, StringBuilder and text blocks; date, time, duration, period, instant and time-zone objects.

if/else, switch statements and expressions, loops, and break and continue statements.

Objects and nested classes, object life cycle and garbage collection, classes and records, overloading with varargs, scope, var, encapsulation and immutability, inheritance with abstract and sealed classes, overriding, polymorphism, casting, instanceof and pattern matching, interfaces, functional interfaces, and enums.

try/catch/finally, try-with-resources, multi-catch blocks, and custom exceptions.

Arrays, List, Set, Map and Deque collections: add, remove, update, retrieve and sort elements.

Object and primitive streams with lambdas implementing functional interfaces; decomposition, concatenation, reduction, grouping and partitioning on sequential and parallel streams.

Modules and dependencies, exposing content including for reflection, services; compiling, modular and non-modular JARs, runtime images, and migration with unnamed and automatic modules.

Runnable and Callable worker threads, thread life cycle and executor services; thread-safe code with locking and the concurrent API; processing collections concurrently, including parallel streams.

Console and file data with I/O streams, object serialization, and Path objects with the java.nio.file API.

Connections, basic, prepared and callable statements, query results, and transaction control.

Locales, resource bundles, and parsing and formatting messages, dates, times, numbers, currency and percentages.