Udemy – Java Programming for Complete Beginners [2025]

Udemy Original Course Link

In more than 250 Steps, we explore the most important Core Java Programming Language Features

• Basics of Java Programming – Expressions, Variables, and Printing Output

• Java Operators – Java Assignment Operator, Relational and Logical Operators, Short Circuit Operators

• Java Conditionals and If Statement

• Methods – Parameters, Arguments, and Return Values

• Object-Oriented Programming – Class, Object, State, and Behavior

• Basics of OOPS – Encapsulation, Abstraction, Inheritance, and Polymorphism

• Basics about Java Data Types – Casting, Operators, and More

• Java Built-in Classes – BigDecimal, String, Java Wrapper Classes

• Conditionals with Java – If Else Statement, Nested If Else, Java Switch Statement, Java Ternary Operator

• Loops – For Loop, While Loop in Java, Do While Loop, Break and Continue

• Immutability of Java Wrapper Classes, String and BigDecimal

• Java Dates – Introduction to LocalDate, LocalTime and LocalDateTime

• Java Array and ArrayList – Java String Arrays, Arrays of Objects, Primitive Data Types, toString and Exceptions

• Introduction to Variable Arguments

• Basics of Designing a Class – Class, Object, State and Behavior. Deciding State and Constructors.

• Understanding Object Composition and Inheritance

• Java Abstract Class and Interfaces. Introduction to Polymorphism.

• Java Collections – List Interface(ArrayList, LinkedList and Vector), Set Interface (HashSet, LinkedHashSet and TreeSet), Queue Interface (PriorityQueue) and Map Interface (HashMap, HashTable, LinkedHashMap and TreeMap() – Compare, Contrast and Choose

• Generics – Why do we need Generics? Restrictions with extends and Generic Methods, WildCards – Upper Bound and Lower Bound.

• Functional Programming – Lambda Expression, Stream and Operations on a Stream (Intermediate Operations – Sort, Distinct, Filter, Map and Terminal Operations – max, min, collect to List), Functional Interfaces – Predicate Interface, Consumer Interface, Function Interface for Mapping, Method References – static and instance methods

• Introduction to Threads and MultiThreading – Need for Threads

• Implementing Threads – Extending Thread Class and Implementing Runnable Interface

• States of a Thread and Communication between Threads

• Introduction to Executor Service – Customizing the number of Active Threads. Returning a Future, invokeAll, and invokeAny

• Introduction to Exception Handling – Your Thought Process during Exception Handling. try, catch, and finally. Exception Hierarchy – Checked Exceptions vs Unchecked Exceptions. Throwing an Exception. Creating and Throwing a Custom Exception – CurrenciesDoNotMatchException. Try with Resources – New Feature in Java 7.

• List files and folders in Directory with Files list method, File walk method and find methods. Read and write from a File.

Covers Java New Features from Java 8 to Java 24 (incl. Java 17, Java 21)

• Java 8 – Embraced functional programming with Lambda expressions and Streams.

• Java 9 – Introduced modularization to the Java Platform – enabling faster startup and less memory footprint for Java applications

• Java 10 to NOW – Started the six-month release cycle for faster updates and quick feedback. (Java 10 to Java 25 to ..)

• Java 11 to NOW – Reduced code verbosity

  • Switch Expressions – More concise conditional logic. (Java 14)

  • Text Blocks – Simplifies multi-line strings. (Java 15)

  • Records – Reduces boilerplate for data objects. (Java 16)

  • Pattern Matching – Enhances code readability and conciseness. (Java 16)

  • Sealed Classes – Controlled inheritance of your class hierarchies. (Java 17)

  • Unnamed Variables & Patterns – Allows ignoring unused variables in code. (Java 22)

  • Markdown Documentation Comments – Enhances Javadoc with Markdown support (Java 23)

  • Stream Gatherers – Introduces new ways to aggregate stream data. (Java 24)

• Java 21 to NOW:

  • Project Loom – Virtual threads for high-performance concurrency. (Java 21)

  • Cloud & Container-Ready – Optimized for modern cloud-native applications.