Oracle Java SE 21 Developer Professional: 1Z0-830
- Description
- Curriculum
- FAQ
- Reviews
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 Certification
-
Career 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 You
This 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 Course
The 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 Values
-
Use 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 Flow
-
Create and manage control flow constructs such as if/else, switch statements and expressions, loops, and break/continue statements.
3. Using Object-Oriented Concepts in Java
-
Declare 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 Exceptions
-
Handle exceptions with try/catch/finally, try-with-resources, and multi-catch blocks.
-
Create and use custom exceptions.
5. Working with Arrays and Collections
-
Create and manipulate arrays, List, Set, Map, and Deque collections, including adding, removing, updating, retrieving, and sorting elements.
6. Working with Streams and Lambda Expressions
-
Use 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 Code
-
Define 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 Execution
-
Create 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 API
-
Read/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 Localization
-
Implement localization using locales and resource bundles.
-
Parse and format messages, dates, times, and numbers, including currency and percentage values.
11. Additional Java Features
-
Understand the basics of the Java Logging API.
-
Use annotations like @Override, @FunctionalInterface, @Deprecated, @SuppressWarnings, and @SafeVarargs.
Comprehensive Scope of Certification
By completing this course, you will develop proficiency in:
-
Handling Date, Time, Text, Numeric, and Boolean Values
-
Controlling Program Flow
-
Object-Oriented Concepts in Java
-
Handling Exceptions
-
Arrays and Collections
-
Streams and Lambda Expressions
-
Packaging and Deploying Java Code
-
Managing Concurrent Code Execution
-
Java I/O API
-
Localization
-
Additional Java Features
This comprehensive preparation ensures you are fully equipped to pass the Oracle 1Z0-830 certification and advance your career in Java development. Let’s begin!
-
1Communication planVideo lesson
From this lecture you will learn:
• How to communicate during this course• Where to ask questions
• How to ask questions
• Communication channels
-
2Unlimited access to 'Learn IT' application for studentsVideo lesson
From this lecture you will learn:
• Where to find good tests to verify your knowledge
• How to get unlimited access to Learn IT application (only for my students from Udemy)
-
3Tips to Improve Your Course Taking ExperienceText lesson
-
4Additional Free Learning Materials to Use During the CourseText lesson
-
5About 1Z0-830 Certification and the CourseText lesson
-
6Why Java and why this course? What is JDK, JRE and JVM?Video lesson
From this lecture you will learn:
• Java History
• Why Java
• What you can implement with Java
• This training course structure
• Opportunities after this course
• What is JVM
• What is JRE
• What is JDK
-
7About Latest Java VersionText lesson
-
8JDK InstallationVideo lesson
From this lecture you will learn:
• How to chose JDK version
• Difference between openjdk and oraclejdk
• How to install jdk on computer
• How to configure environment variables
-
9First application: Hello World AppVideo lesson
From this lecture you will learn:
• What are console applications
• How to compile .java files to bytecode
• Basic Syntax
• How to create ‘Hello World’ app on Java
• What are compilation errors
• How to execute our programs on JVM
-
10Homework Solution: .bat file creationVideo lesson
In the lesson we will solve homework together with and we will write batch script from scratch to compile your source code and run Hello World application.
-
11Integrated Development Environment, Eclipse OverviewVideo lesson
From this lecture you will learn:
• What is IDE
• What are the most popular IDE for Java development
• Eclipse for Java EE developers: Overview
• Eclipse Java Project
• What is a package
-
12Comments in Java source codeVideo lesson
From this lecture you will learn:
• What are comments
• What are types of comments in Java source code
• Java Doc
• Tips and best practices
-
13Quiz: Java Basics - Check yourselfText lesson
The Quiz covers content from the following lessons:
What is Java and JDK
JDK Installation
First application: Hello World App
Integrated Development Environment, Eclipse Overview
Comments in Java Source Code
-
14Primitive types and variablesVideo lesson
From this lecture you will learn:
• What data types exists in Java
• What are primitive types
• Integers
• Floating-point numbers
• Characters
• Boolean
• Primitive types conversion
• What are variables
• 'var' variables
• Java keywords
-
15Number SystemsVideo lesson
From this lecture you will learn:
• Number Systems
• Binary number system
• Octal number system
• Hexadecimal number system
• How to convert from one system to another
• Binary, octal and hexadecimal literals in Java
-
16ArraysVideo lesson
From this lecture you will learn:
• Arrays: overview
• One-dimensional arrays
• How to access elements in arrays
• Default values for elements in array
• ArrayIndexOutOfBoundsException
• Array literal
• Multidimensional arrays
•‘ null’ values
• java.util.Arrays
• import statement
• How to investigate JDK source code
-
17Quiz: Primitive data types, variables and arrays - Check yourselfText lesson
The Quiz covers content from the following lessons:
Primitive types and variables
Number Systems
Arrays
-
18Packages: creation and package presentation in eclipseVideo lesson
From this lecture you will learn:
- how to create packages in eclipse
- how to configure package presentation in eclipse
- what is flat and hierarchical package presentation
- how to create nested packages
- how to create package during class creation
-
19Plugins: how to install free plugins, eclipse marketplace, workspace stylesVideo lesson
From this lecture you will learn:
- What are eclipse plugins?
- How to install free plugins?
- Eclipse marketplace
- How to change style of the workspace
-
20Code Refactoring in EclipseVideo lesson
From this lecture you will learn:
• How to rename multiple items at once
• Code formatting
• Configure formatting rules
• Extract variable from expression
• Extract method from multiple statements
• Import optimization
-
21Operators in JavaVideo lesson
From this lecture you will learn:
• What are operators?
• Type of operators
• Arithmetic operators
• Assignment operators
• Relational operators
• Logical operators
• Bitwise operators
• Ternary operator
• Operator precedence
-
22Operations with integers and floating-point numbers, BigDecimal typeVideo lesson
From this lecture you will learn:
• Dividing of integers specifics
• Subtraction of floating-point numbers specifics
• BigDecimal type
• How to control precision of arithmetic operations
-
23Math class, NaN, InfinityVideo lesson
From this lecture you will learn:
• java.lang.Math class overview
• How to perform basic mathematical operations
• Rounding
• Random number generation
• NaN - what is not a number?
• Infinity - what is 'infinity'?
• How to find max and min value?
• How to find square root?
-
24Type of the expression in JavaVideo lesson
From this lecture you will learn:
• What is expression
• What is statement
• Type of the expression in Java
• Concatenation with String
-
25Compare primitive and reference types & Java Memory ModelVideo lesson
From this lecture you will learn:
• How to compare primitives
• How to compare reference types
• Java Memory Model: Heap and Stack in Java
• Integer pool
• equals() method
• How to compare arrays
-
26Read user input from consoleVideo lesson
From this lecture you will learn:
• How you can read input from the console
• What is System.in
-
27Simple console integer calculatorQuiz
-
28Calculate Area of TriangleQuiz
-
29Calculate Circle CircumferenceQuiz
-
30Homework review: Operators and OperationsVideo lesson
From this lecture you will learn:
• How to run programs with arguments
• Project Explorer VS Navigator view in Eclipse
• How to run JVM with arguments
• How to set up maximum heap size for JVM
• Solutions for coding exercises
-
31Quiz: Operators and Operations with primitive types - Check yourselfText lesson
The Quiz covers content from the following lessons:
Operators in Java
Operations with integers and floating-point numbers, BigDecimal type
Math class, NaN, Infinity
Type of the expression in Java
Compare primitive and reference types & Java Memory Model
Read user input from console
-
32String: object creation and main methods overviewVideo lesson
From this lecture you will learn:
• java.lang.String class overview
• Main String methods
• How to create String objects
-
33String comparison: How to compare Strings and what is String PoolVideo lesson
From this lecture you will learn:
• String pool
• String comparison
-
34Escape Sequences in JavaVideo lesson
From this lecture you will learn:
• What are escape sequences?
• What escape sequences are available in Java?
• Unicode characters escaping
-
35String FormattingVideo lesson
From this lecture you will learn:
• How to format string
• What are format specifiers?
• How to use Formatter?
• When need to format strings?
-
36Regular expressions in JavaVideo lesson
From this lecture you will learn:
• What are regular expressions?
• When to use regular expressions?
• Why we need regular expressions?
• How to write regular expressions in Java?
• Pattern and Matcher objects in Java
• How to find words in String
-
37Format floating-point numberQuiz
-
38Split WordsQuiz
-
39Homework review: StringVideo lesson
In this lesson you will see one of the way to solve home tasks. Best practices will be shared. POSIX groups will be discussed.
-
40Quiz: Strings in Java - Check yourselfText lesson
The Quiz covers content from the following lessons:
String: object creation and main methods overview
String comparison: How to compare Strings and what is String Pool
Escape Sequences in Java
String Formatting
Regular expressions in Java
-
41'if - else' constructionVideo lesson
From this lecture you will learn:
• How to use 'if' statement
• Syntax of 'if' statement
• Nested 'if' statements
• 'if-else-if' ladder
-
42Admin and Guest mode for applicationQuiz
-
43Simple Number CalculatorQuiz
-
44Homework review: 'if' statementVideo lesson
In this lesson you will find solution for coding exercises from 'if' statement topic
-
45'switch' constructionVideo lesson
From this lecture you will learn:
• How to use 'switch' statement
• Syntax of 'switch' statement
• Type of expression to be used in 'switch'
• 'break' statement
• 'default' statement
• 'switch' vs 'if statement
-
46User Activity SelectorQuiz
-
47Homework review: 'switch' statementVideo lesson
In this lesson you will find solution for 'swtich' statement homework.
-
48Quiz: Control Statements - Check yourselfText lesson
The Quiz covers content from the following lessons:
‘if-else’ construction
‘switch’ construction
-
50'while' loopVideo lesson
From this lecture you will learn:
• What are iteration statements in Java?
• When we need to use iteration statements in Java
• Examples of loops in Java
• 'while' loop
-
51'do-while' loopVideo lesson
From this lecture you will learn:
• How to use 'do-while' loop
• Usage of ´do-while´ loop - examples
• When to use 'do-while' over 'while' loop
-
52'for' with condition loopVideo lesson
From this lecture you will learn:
• How to use 'for' with condition loop
• Examples of the use
• Comma in for loop
-
53'for each' loopVideo lesson
From this lecture you will learn:
• How to use 'for each' loop
• Examples of the use
• Shortcut in eclipse to create 'for each' loop
-
54Nested loopsVideo lesson
From this lecture you will learn:
• How you can put one loop inside another one
• When you need to use nested loops
-
55Jump Statements - Break and ContinueVideo lesson
From this lecture you will learn:
• What are jump statements
• Continues statement
• Break statement
-
56Labels in JavaVideo lesson
From this lecture you will learn:
• What is goto statement in programming?
• Labels in Java
• How to use labels in Java
-
57Print digits from new lineQuiz
-
58Pyramid in consoleQuiz
-
59Print matrix to consoleQuiz
-
60Homework review: Iteration Statements (Loops)Video lesson
In this lesson we will review solution for coding exercises.
-
61Quiz: Iteration Statements (Loops) in Java - Check yourselfText lesson
The Quiz covers content from the following lessons:
'while' loop
'do-while' loop
'for' with condition loop
'for each' loop
Nested loops
Jump Statements - Break and Continue
Labels in Java
-
62Methods in Java: OverviewVideo lesson
From this lecture you will learn:
• What is a method
• Method signature
• How to declare methods
• How to call methods
• Method overloading
• Pass arguments by value
• Recursive methods
• Variable-length arguments
-
63Parameter Passing Mechanism in JavaVideo lesson
From this lecture you will learn:
• Passing data by value
• Passing data by reference
• Passing primitive types to method in Java
• Passing reference types to method in Java
-
64Recursive methodsVideo lesson
From this lecture you will learn:
• What is recursion
• What are recursive methods
• How to write recursive methods
• When do we need recursive methods
• Pros and cons of recursive methods
-
65Variable Length ArgumentsVideo lesson
From this lecture you will learn:
• What are variable-length arguments
• Syntax of varargs
• Varargs in the methods
-
66Find max int in arrayQuiz
-
67Draw empty rectangleQuiz
-
68Calculate Amount of WordsQuiz
-
69Filter String arrayQuiz
-
70Rotate MatrixQuiz
-
71Extend ArrayQuiz
-
72Greatest Common DivisorQuiz
-
73Sum all digits in numberQuiz
-
74String ProcessorQuiz
-
75Turn each first letter in a word to capitalQuiz
-
76Convert decimal to Roman numbers and vice versaQuiz
-
77Homework review: MethodsVideo lesson
In this video we will review coding exercises from this section
