Java Programming Masterclass - Beginner to Master

Explore how Java method parameters act as placeholders that pass data into a method, enabling versatile code, with examples of multiple parameters and primitive or object types.

Explore Java method overloading by creating multiple methods with the same name but different parameters, and see how the compiler selects the correct method by argument types.

Explore Java variable scope, including local, instance, and class scope, and learn how to define and use variables in different blocks with practical examples.

Explore how to define and use class attributes in Java, including static attributes shared by all instances, with practical code examples and a constructor that tracks total students.

Master Java constructors, the methods that initialize objects when created and set their initial attributes. See how constructors accept parameters to customize objects, with model year and model name.

Explore how Java modifiers control access and inheritance, with practical examples of static and final modifiers, showing class level members and constant values.

Master Java encapsulation by binding data and methods in a class, protecting data with access modifiers and private fields, and using getter and setter methods in a student example.

Organize Java code into packages and leverage the Java API to create and use classes like ArrayList, importing components and manipulating lists with add and loop display.

Explore how Java uses inheritance to reuse code and relate classes by defining a superclass Animal and a subclass Dog with name and eat and bark methods.

Explore Java polymorphism by using a common superclass and overridden methods in dog and cat classes, demonstrated through an array of animals that invoke each sound.

Explore inner classes in Java to boost encapsulation and code organization; learn how member inner classes access outer variables.

Explore Java abstraction by modeling real world objects with abstract classes and concrete subclasses, hiding complex implementation details. Learn to implement calculate area for shapes like circle and rectangle.

Explore how Java interfaces enable multiple inheritance and polymorphism through abstract methods that define a contract for implementing classes, enabling modular, maintainable design.

Master Java enums by defining a set of predefined values that enhance readability and type safety, with practical code examples using if and switch statements.

Learn how to read user input in Java using the Scanner class, reading strings, integers, and doubles from the keyboard, and close the scanner after use to build interactive programs.

Master date manipulation in Java with the modern date and time API. Import java.time, create a local date, format it with a date time formatter, and add weeks.

Learn how to use ArrayList in Java to store and manipulate integers, add elements, retrieve by index, and iterate using the size method.

Explore linked lists in Java, a dynamic data structure that enables flexible insertion, deletion, and non-contiguous memory storage, with practical code examples and iterating the list.

Explore HashMap in Java by storing and retrieving key-value pairs, using put and get methods, and handling string, integer, and other object types with practical examples.

Explore how hash sets in Java store unique elements with a hashing mechanism, enabling fast retrieval and efficient memory, as shown by a numbers example and membership checks.

Explore iterators in Java and learn to traverse collections efficiently and consistently using the iterator interface, hasNext, and next with practical code examples.

Explore Java wrapper classes that wrap primitive types as objects, perform comparisons with compareTo, and convert between wrapper and primitive values through practical examples.

Master regular expressions in Java for pattern matching and text manipulation with practical code examples using Pattern, Matcher, and compile methods.

Explore Java threads: learn what threads are, why they boost performance, and how to create and start them using extends Thread or implements Runnable, including basic lifecycle concepts.

Explore Java lambdas and functional programming with concise lambda expressions and functional interfaces, illustrated by examples using collections and printing with lambda methods.

Explore file handling in Java by reading, writing, and manipulating data with practical code using files and path classes, including reading all lines and handling IO exceptions.

Learn to delete files in Java using the Files and Path classes from the java.nio.file package, including handling a list of file names and delete path operations.

Learn to add two numbers in Java by reading input with the scanner class, performing addition, and displaying the result.

Learn to count words in Java by reading input with a scanner and splitting on whitespace to return word count. Explore text processing concepts used by word processors.

Learn to reverse a string in Java by reading input with a Scanner, reversing with StringBuilder, guarding null or empty input in reverseString, and printing the result.

Learn how to sum array elements in Java by reading input with a scanner, iterating with a loop, and printing the total sum.

Learn how a Java program uses scanner class to read length and width. Multiply length by width to get the rectangle area using private static calculateArea, then print the result.

Discover how to determine if a number is even or odd in Java by using the modulus operator and user input from the Scanner, with a function that prints result.

Understand the Java virtual machine architecture, including class loading, bytecode verification and resolution, memory areas like the method area and heap, the interpreter, just-in-time compilation, and garbage collection.