Preparation for Oracle Certification (Java Certification) Java SE 21 1Z0-830 with examples, quizes and home tasks
What you will learn
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Master handling primitives, wrapper classes, and type conversions in Java
Evaluate and apply arithmetic and boolean expressions with precedence rules
Effectively manipulate text using String, StringBuilder, and text blocks
Work with Java Date-Time API to handle date, time, period, and timezone objects
Create and manage control flow constructs like if/else, switch, and loops
Implement advanced object-oriented concepts, including encapsulation and inheritance
Create classes, records, and instantiate fields, methods, and constructors
Apply polymorphism, method overriding, and the instanceof operator with pattern matching
Work with Java interfaces, functional methods, and enums effectively
Handle exceptions using try/catch/finally, try-with-resources, and multi-catch blocks
Create and manipulate arrays and Java Collections like List, Set, Map, and Deque
Process data using Streams and lambda expressions for filtering, transforming, and sorting
Perform advanced operations on Streams like decomposition, reduction, and grouping
Understand modular Java, compile code, and create modular/non-modular JARs
Manage concurrent code execution with threads, ExecutorService, and parallel streams
Develop thread-safe code with locking mechanisms and concurrent APIs
Use Java I/O API for reading/writing files and serializing/deserializing objects
Implement localization using resource bundles and locale-specific parsing/formatting
Understand additional Java features, including annotations and the Java Logging API
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