Preparation for Oracle Certification (Java Certification) Java SE 21 1Z0-830 with examples, quizes and home tasks

What you'll learn

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

Requirements

No Prior Java Knowledge Required: The course is beginner-friendly and comprehensive

Willingness to Learn: Openness to explore Java's in-depth concepts

Stable Internet Connection: For accessing course materials and completing exercises online

Time Commitment: Availability to dedicate consistent time to learning and practice

Description

What Is Oracle 1Z0-830 Certification?The Oracle 1Z0-830 certification, also known as the Java SE 21 Developer Certification, is an advanced credential that validates your expertise in modern Java development. This certification is specifically designed for professionals who want to showcase their skills in Java SE 21 features, covering a wide range of programming concepts, from object-oriented principles to modular applications.Benefits of Earning This CertificationCareer Growth: Elevate your profile with a globally recognized certification.Updated Knowledge: Stay ahead with expertise in Java SE 21, the latest long-term support version.Credibility: Demonstrates a deep understanding of core and advanced Java programming concepts.Real-World Applications: Gain skills that are highly relevant to modern enterprise applications.How This Course Prepares YouThis course is crafted to help you master every topic required for the Oracle 1Z0-830 certification. It includes lessons to build your understanding and quizzes to test your knowledge. By the end of the course, you'll be well-prepared to tackle the certification exam with confidence.Topics Covered in This CourseThe Oracle 1Z0-830 certification requires proficiency across various domains of Java development. Below is a breakdown of the topics:1. Handling Date, Time, Text, Numeric, and Boolean ValuesUse primitives and wrapper classes, evaluate arithmetic and boolean expressions, and apply precedence rules, type conversions, and casting.Manipulate text using String, StringBuilder, and text blocks.Work with date, time, duration, period, and time-zone objects, including daylight saving time, using the Date-Time API.2. Controlling Program FlowCreate and manage control flow constructs such as if/else, switch statements and expressions, loops, and break/continue statements.3. Using Object-Oriented Concepts in JavaDeclare and instantiate objects, including nested classes, and explain object lifecycles.Create classes, records, and define/instantiate instance and static fields, methods, constructors, and initializers.Implement method overloading, including var-arg methods.Understand variable scopes, apply encapsulation, and create immutable objects.Use local variable type inference.Implement inheritance, including abstract and sealed types, record classes, and overriding methods, including those of the Object class.Use polymorphism, casting, and the instanceof operator with pattern matching and switch constructs.Create and use interfaces with functional methods, and private, static, and default methods.Work with enums including fields, methods, and constructors.4. Handling ExceptionsHandle exceptions with try/catch/finally, try-with-resources, and multi-catch blocks.Create and use custom exceptions.5. Working with Arrays and CollectionsCreate and manipulate arrays, List, Set, Map, and Deque collections, including adding, removing, updating, retrieving, and sorting elements.6. Working with Streams and Lambda ExpressionsUse Java Streams, including lambda expressions implementing functional interfaces, to filter, transform, process, and sort data.Perform decomposition, concatenation, reduction, grouping, and partitioning on sequential and parallel streams.7. Packaging and Deploying Java CodeDefine and expose module content, including by reflection, and declare module dependencies.Compile Java code, create modular/non-modular JARs, runtime images, and implement migration to modules using unnamed/automatic modules.8. Managing Concurrent Code ExecutionCreate platform and virtual threads using Runnable and Callable objects.Manage thread lifecycles and use different ExecutorService implementations and concurrent APIs.Develop thread-safe code with locking mechanisms and process Java collections concurrently with parallel streams.9. Using Java I/O APIRead/write console and file data using I/O Streams.Serialize and deserialize Java objects.Work with Path objects and their properties using the java.nio.file API.10. Implementing LocalizationImplement localization using locales and resource bundles.Parse and format messages, dates, times, and numbers, including currency and percentage values.11. Additional Java FeaturesUnderstand the basics of the Java Logging API.Use annotations like @Override, @FunctionalInterface, @Deprecated, @SuppressWarnings, and @SafeVarargs.Comprehensive Scope of CertificationBy completing this course, you will develop proficiency in:Handling Date, Time, Text, Numeric, and Boolean ValuesControlling Program FlowObject-Oriented Concepts in JavaHandling ExceptionsArrays and CollectionsStreams and Lambda ExpressionsPackaging and Deploying Java CodeManaging Concurrent Code ExecutionJava I/O APILocalizationAdditional Java FeaturesThis comprehensive preparation ensures you are fully equipped to pass the Oracle 1Z0-830 certification and advance your career in Java development. Let's begin!

Overview

Section 1: Introduction

Lecture 1 Communication plan

Lecture 2 Unlimited access to 'Learn IT' application for students

Lecture 3 Tips to Improve Your Course Taking Experience

Lecture 4 Additional Free Learning Materials to Use During the Course

Lecture 5 About 1Z0-830 Certification and the Course

Section 2: Java Basics

Lecture 6 Why Java and why this course? What is JDK, JRE and JVM?

Lecture 7 About Latest Java Version

Lecture 8 JDK Installation

Lecture 9 First application: Hello World App

Lecture 10 Homework Solution: .bat file creation

Lecture 11 Integrated Development Environment, Eclipse Overview

Lecture 12 Comments in Java source code

Lecture 13 Quiz: Java Basics - Check yourself

Section 3: Primitive Data Types, Variables and Arrays

Lecture 14 Primitive types and variables

Lecture 15 Number Systems

Lecture 16 Arrays

Lecture 17 Quiz: Primitive data types, variables and arrays - Check yourself

Section 4: Eclipse: Tips and Tricks

Lecture 18 Packages: creation and package presentation in eclipse

Lecture 19 Plugins: how to install free plugins, eclipse marketplace, workspace styles

Lecture 20 Code Refactoring in Eclipse

Section 5: Operators and Operations with primitive types

Lecture 21 Operators in Java

Lecture 22 Operations with integers and floating-point numbers, BigDecimal type

Lecture 23 Math class, NaN, Infinity

Lecture 24 Type of the expression in Java

Lecture 25 Compare primitive and reference types & Java Memory Model

Lecture 26 Read user input from console

Lecture 27 Homework review: Operators and Operations

Lecture 28 Quiz: Operators and Operations with primitive types - Check yourself

Section 6: Strings in Java

Lecture 29 String: object creation and main methods overview

Lecture 30 String comparison: How to compare Strings and what is String Pool

Lecture 31 Escape Sequences in Java

Lecture 32 String Formatting

Lecture 33 Regular expressions in Java

Lecture 34 Homework review: String

Lecture 35 Quiz: Strings in Java - Check yourself

Section 7: Control Statements

Lecture 36 'if - else' construction

Lecture 37 Homework review: 'if' statement

Lecture 38 'switch' construction

Lecture 39 Homework review: 'switch' statement

Lecture 40 Quiz: Control Statements - Check yourself

Section 8: Miscellaneous

Lecture 41 Random numbers generation

Section 9: Iteration Statements (Loops) in Java

Lecture 42 'while' loop

Lecture 43 'do-while' loop

Lecture 44 'for' with condition loop

Lecture 45 'for each' loop

Lecture 46 Nested loops

Lecture 47 Jump Statements - Break and Continue

Lecture 48 Labels in Java

Lecture 49 Homework review: Iteration Statements (Loops)

Lecture 50 Quiz: Iteration Statements (Loops) in Java - Check yourself

Section 10: Methods in Java

Lecture 51 Methods in Java: Overview

Lecture 52 Parameter Passing Mechanism in Java

Lecture 53 Recursive methods

Lecture 54 Variable Length Arguments

Lecture 55 Homework review: Methods

Section 11: Enumerations in Java

Lecture 56 Enumerations in Java

Section 12: Debugging Tools

Lecture 57 How to debug Java programs

Section 13: Object-oriented programming

Lecture 58 Object-oriented programming: Basics

Lecture 59 Classes & Objects

Lecture 60 Different types of Classes, Abstract keyword and Abstract classes

Lecture 61 Interfaces

Lecture 62 Inheritance

Lecture 63 Polymorphism and 'final' keyword

Lecture 64 'static' keyword

Lecture 65 Encapsulation

Lecture 66 Object, JNI and Object class overview

Lecture 67 SOLID principles overview & Single Responsibility Principle

Lecture 68 Open / Closed Principle

Lecture 69 Liskov Substitution Principle

Lecture 70 Interface Segregation Principle

Lecture 71 Dependency Inversion Principle

Lecture 72 KISS Principle in OOP

Lecture 73 YAGNI Principle in OOP

Lecture 74 DRY Principle in OOP | Part 1

Lecture 75 DRY Principle in OOP | Part 2 - Practice

Section 14: ===== OOP: Interview Preparation =====

Lecture 76 How to be prepared for the interview?

Lecture 77 Part 1: OOP Interview - Questions and Answers

Lecture 78 Part 2: OOP Interview - Questions and Answers

Lecture 79 Part 3: OOP & Design Patterns Interview - Questions and Answers

Section 15: ===== EXAM: OOP & Object Oriented e-Commerce console applications =====

Lecture 80 Exam and homework for OOP topic

Section 16: Excpetion Handling

Lecture 81 Exception Handling in Java

Section 17: Java Collections Framework

Lecture 82 Java Collections Framework: Overview

Lecture 83 Collection Interface

Lecture 84 Interfaces List, Set and Queue: Overview

Lecture 85 List implementations - ArrayList, Vector, CopyOnWriteArrayList & Stack

Lecture 86 LinkedList VS ArrayList, Big O Notation & Homework

Lecture 87 Comparator and Comparable

Lecture 88 Iterable, Iterator & ListIterator

Lecture 89 Queue and Deque

Lecture 90 Map Hierarchy

Lecture 91 Hash Tables & HashMap

Lecture 92 LinkedHashMap

Lecture 93 SortedMap, NavigableMap & TreeMap

Lecture 94 Set Implementations (HashSet practice) & java.util.Colelctions class

Section 18: Generics

Lecture 95 Generics in Java

Section 19: ===== Java Collections Framework: Interview Preparation =====

Lecture 96 How to be prepared for the interview?

Lecture 97 Part 1: Java Collections Framework Interview - Questions and Answers

Lecture 98 Part 2: Java Collections Framework Interview - Questions and Answers

Lecture 99 Part 3: Java Collections Framework Interview - Questions and Answers

Lecture 100 Part 4: Java Collections Framework Interview - Questions and Answers

Lecture 101 Part 5: Java Collections Framework Interview - Questions and Answers

Section 20: Functional Programming in Java

Lecture 102 Functional Programming in Java: Overview

Lecture 103 Functional Interface, Lambda Functions & Method References

Lecture 104 Function & BiFunction: Theory & Practice

Lecture 105 Consumer, BiConsumer, Predicate & BiPredicate

Section 21: Stream API

Lecture 106 Stream API with Practical Exercises

Section 22: ===== Functional Programming in Java: Interview Preparation =====

Lecture 107 How to be prepared for the interview?

Lecture 108 Part 1: Java Functional Programming Interview - Questions and Answers

Lecture 109 Part 2: Java Functional Programming Interview - Questions and Answers

Section 23: Input and Output Streams in Java (I/O & NIIO)

Lecture 110 Input and Output Streams in Java

Lecture 111 Serialization and Cloning

Section 24: ===== I/O in Java: Interview Preparation =====

Lecture 112 Part 1: Java I/O Interview - Questions and Answers

Lecture 113 Part 2: Java I/O Interview - Questions and Answers

Section 25: Multithreading

Lecture 114 Multithreading Overview

Lecture 115 First Multithreading Program: Thread & Runnable

Lecture 116 Thread Scheduler, Race Condition, Daemon Threads & Thread Groups

Lecture 117 Synchronization Basics

Lecture 118 Memory Management in Multithreading Programs

Lecture 119 Deadlock & Livelock

Lecture 120 Executor Services, Callable & Future

Lecture 121 Executor Service Implementations & ThreadFactory

Lecture 122 Fork/Join Framework

Lecture 123 CompletableFuture

Lecture 124 Lock API - Lock, ReadWriteLock, ReentrantLock, ReentrantReadWriteLock, StampedLo

Lecture 125 Synchronizers - CyclicBarrier, CountDownLatch, Semaphore, Exchanger & Phaser

Lecture 126 Homework: Multithreading

Section 26: ===== Multithreading in Java: Interview Preparation =====

Lecture 127 Part 1: Java Multithreading Interview - Questions and Answers

Lecture 128 Part 2: Java Multithreading Interview - Questions and Answers

Section 27: Date and Time in JDK

Lecture 129 Time Standards (GMT, UTC), Date and Calendar from java.util

Lecture 130 java.time Package (Instant, LocalDateTime, ZonedDateTime etc)

Section 28: Java Reflection API & Annotations

Lecture 131 Java Reflection API

Lecture 132 Annotations

Section 29: JDK API

Lecture 133 StringBuilder & StringBuffer

Lecture 134 java.util.Optional - Optional in Java

Lecture 135 Reactive Programming in Java: Flow API, Reactive Streams

Section 30: Modules in Java & Migration of Java Apps

Lecture 136 Modules in Java: Modular Application Example

Lecture 137 Migration of Java Apps: Example of migration to a modular application

Section 31: I18N & L10N

Lecture 138 [Part 1] Localization and Internationalization

Lecture 139 [Part 2] Localization and Internationalization

Section 32: ===== Java Core: Interview Preparation =====

Lecture 140 How to be prepared for the interview?

Lecture 141 Part 1: Java Core Interview: Questions and Answers

Lecture 142 Part 2: Java Core Interview: Questions and Answers

Lecture 143 Part 3: Java Core Interview: Questions and Answers

Lecture 144 Part 4: Java Core Interview: Questions and Answers

Lecture 145 Part 5: Java Core Interview: Questions and Answers

Lecture 146 Part 6: Java Core Interview: Questions and Answers

Lecture 147 Part 7: Java Core Interview: Questions and Answers

Section 33: Logging in Java

Lecture 148 Logging in Java: Part 1 (Logging theory, Logging Levels, Java Logging Framework)

Lecture 149 Logging in Java: Part 2 (Log4J, Logback, SLF4J)

Section 34: Java: New Versions

Lecture 150 Java 8 Features (Lambda, Stream API, Optional, Effectively Final, etc.)

Lecture 151 Java 9: Stream API Updates, Multi-Resolution Image, Stack-Walking API, etc.

Lecture 152 Java 9: Process API & CompletableFuture API updates, Interface Private Methods

Lecture 153 Java 9: jlink & jshell

Lecture 154 Java 9: Multi-Release JAR Files & Compact Strings

Lecture 155 Java 9: Deprecated & Removed Features

Lecture 156 Java 10: 'var' variables (Type inference), Docker support, Flex Heap Size, etc.

Lecture 157 Java 10: Other improvements, Removals, Deprecations, Release Versioning

Lecture 158 Java 11: LTS Concept, New HTTP Client, String & Files API Updates

Lecture 159 Java 11: Collection & Predicate API Updates, Nest-Based Access Control & more

Lecture 160 Java 12: CompactNumberFormat, Teeing Collector, String.indent(), transform()

Lecture 161 Java 13: Socket API, newFileSystem() method, ZGC Uncommit Unused Memory & others

Lecture 162 Java 14: Switch expressions, Currency Format, Helpful NullPointerExceptions

Lecture 163 Java 15: Text Blocks, Hidden Classes, new String methods

Lecture 164 Java 16: JEP 395 - Records

Lecture 165 Java 16: instanceof, Day Period Support, Stream.toList() & others

Lecture 0 Java 17: Sealed Classes & other improvements

Section 35: == EXAM Java Standard Edition - Online Store - Task description and solution ==

Lecture 166 Implement online store application

Section 36: Bonus section

Lecture 167 Bonus lesson

Beginner Programmers: Those new to programming and looking to start with Java,Intermediate Java Developers: Developers seeking to deepen their understanding of Java features and best practices,Students Preparing for Oracle Certification: Individuals aiming to pass the Oracle 1Z0-830 certification exam,Software Engineers: Professionals looking to enhance their Java skills for career growth,Tech Enthusiasts: Anyone interested in learning Java for personal or professional projects,College Students: Computer science or IT students wanting to strengthen their Java knowledge,Backend Developers: Developers focused on server-side programming and Java-based applications