Java SE 21: Programming I Training

Based on the Official Oracle Curriculum, this entry-level training is designed for developers new to the Java programming language. It covers core Java concepts including syntax, data types, control structures, object-oriented programming (OOP), lambda expressions, and modular programming.

Throughout the course, students use Java SE 21 and apply their learning through hands-on labs that reinforce each topic.

Basic understanding of any programming language or introductory Java knowledge is recommended

By the end of this training, you will have gained knowledge and skills in the following areas:

• Use variables, arrays, conditional statements, and loops to build programs

• Create simple Java classes and access fields/methods using object references

• Write and execute Java applications from the command line

• Begin working with Java’s Collections API

• Use Predicate Lambda expressions in basic scenarios

• Handle exceptions with Java’s exception handling mechanisms

• Apply foundational OOP principles: encapsulation, inheritance, and polymorphism

• Understand basic modular programming and define modules using module-info.java

• Navigate Java API documentation and work with Strings effectively

• Understand the basics of file access using NIO

• Practice coding interactively using JShell

🔹 1. Introduction to Java Programs

• Key Java language features

• Setting up the development environment

• Creating and running a Java Main class

🔹 2. Java Classes and the Main Method

• Defining and adding a main() method

• Basic structure of a Java class

🔹 3. Variables and Data Types

• Declaring variables

• Working with numbers and strings

• Performing numeric operations

🔹 4. Conditions and Lists

• Using IF/ELSE statements

• Managing item lists and processing them

🔹 5. Objects and Classes

• Declaring fields and methods

• Creating and initializing objects

• Accessing members using references

🔹 6. Data Formatting and String Operations

• Using the String and StringBuilder classes

• Referencing Java API documentation

• Type casting and promotion for primitives

🔹 7. Creating and Using Methods

• Defining methods with parameters and return types

• Static methods and variables

• Method overloading

🔹 8. Encapsulation

• Access modifiers (private, public, protected)

• Encapsulating fields

• Constructor overloading

🔹 9. Advanced Conditionals

• Relational and logical operators

• Implementing switch-case structures

• Introduction to the NetBeans debugger

🔹 10. Advanced Arrays and Loops

• Using dates and parsing args[]

• Working with two-dimensional arrays

• Nested loops and loop alternatives

• Introduction to ArrayList

🔹 11. Inheritance

• Creating subclasses and superclasses

• Overriding methods

• Defining and using abstract classes

🔹 12. Interfaces and Polymorphism

• Understanding polymorphism in Java

• Creating and implementing interfaces

• Using var for local variable inference

• Using List and Lambda expressions

🔹 13. Exception Handling

• Differences between checked and unchecked exceptions

• Throwing and catching exceptions

• Multi-catch blocks and error handling

🔹 14. Packaging and Modules

• Working with JAR files

• Java application architecture

• Declaring modules using module-info.java

• Overview of the modular JDK

🔹 15. Using JShell

• Writing interactive Java code with JShell

• JShell commands and IDE integration