Java Foundations: Mastering the Basics

Explore variables and data types in Java, declare and initialize int, double, and char, print results, and master primitive types and typecasting.

Explore arithmetic operators in Java by declaring and initializing integers, performing addition, subtraction, multiplication, division, and modulus; learn order of operations with brackets and incrementing, decrementing, and shortcuts like +=.

Learn to apply boolean logic in Java by using true/false, equals and not equals, greater-than and less-than, and, or, and negation, and compare strings with the dot equals method.

Explore how arrays in Java store values of the same type, declare int and String arrays, access elements by index, print results, and use the length property.

Learn how to read user input in Java using the Scanner class, including integers and strings, with practical prompts and handling the newline buffer before reading a name.

Explore control structures in Java by using if-else statements to categorize ages, handle conditions, and nest checks for age ranges from minor to senior.

Explore how a while loop repeats code while a condition remains true, using an example that prints 0–9 and a guessing game with user input via Scanner.

Explore the for loop in Java by examining initialization, condition, and increment, printing results, and using a scanner to generate a multiplication table up to ten, with break behavior.

Learn how methods inside a class serve as reusable blocks, including built-in and user defined methods, with parameters, calls, and return values.

Explore object oriented programming by defining a car class as a blueprint for objects, with attributes like brand and year, constructors, and methods such as start, accelerate, and brake.

Explore encapsulation and abstraction in Java by building car objects with constructors and methods. Learn access modifiers: public, private, protected, and default package-private, and their impact on visibility.

Learn how a subclass inherits properties and behaviors from its parent class using extends and super, demonstrated with an electric car example featuring battery capacity.

Learn polymorphism in Java through method overriding and overloading. Explore interactions between subclass and superclass and see constructor variants in action with Tesla examples.

Explore how static creates class-level variables and methods shared by all instances, aiding memory management and access control. The final keyword prevents inheritance and overriding, and defines constants like pi.

Interfaces in Java define what a class should do, enabling abstraction by declaring methods without bodies that classes implement, with default methods for area and constants like pi.

Learn how to handle errors in Java using try and catch blocks, with a clear example of guarding against division by zero and printing a graceful message.

Master Java exception handling with multi-line try-catch blocks for arrays, covering array index out of bounds and null pointer exceptions, plus a finally block for resource cleanup.

Jumpstart a swing-based Java GUI by importing Swing library, creating a frame named Note Keeper, setting its size to 500 by 400, and making it visible with exit on close.

Add a scrollable text area to a Java Swing frame using JTextArea and JScrollPane, configure vertical scroll bars as needed, and remove borders for a polished look.

Create a menu bar in the frame using JMenuBar and add file, edit, and format menus with items like new, open, save, and save as.

Create a new file action by wiring a menu item to a file menu class with an action listener that clears the text area and updates the frame title.

Open a file via a file dialog and build the full file path. Read the file with a buffered reader, append lines to the text area, and update frame title.

Learn to save and write files using the FileWriter class, handling io exceptions, and implementing a save as feature with a file path and close operation.

Implement the save method in Java by validating file name, using save as for new files, writing text area content to the chosen path, and handling exceptions.

Implement an edit menu in a Java text editor, adding cut, copy, paste, and select all items to the text area, with an edit class handling methods and actions.

Add a format menu with bold, italic, and font color options; implement bold, italic, and color methods using the font class and a color chooser to update the text area.

Create an image icon from a file path and set it as the frame's icon image using the image icon class. Scale the image to 64 by 64 with smoothing.

Learn to add keyboard shortcuts in a Java app by setting menu accelerators with keystrokes and key events, using control and shift modifiers for common actions.

Review core Java foundations: variables, data types, loops, arrays, and exception handling. Apply object oriented concepts in the Note Keeper project with classes, inheritance, interfaces, and file read/write.