Java Programming Masterclass: From Beginner to Expert

Explore declaring variables in Java using primitive types such as int, double, char, and boolean, distinguish primitive from reference types, and learn type conversion and casting with practical printing examples.

Explore Java keywords, such as public, static, int, class, and identifiers, names for variables, methods, and classes, with rules that identifiers must start with a letter, underscore, or dollar sign.

Explore arithmetic, relational, and logical operators in Java, demonstrating addition, subtraction, multiplication, division, modulus, and how relational operators compare values to produce true or false outcomes.

Learn how Java handles input and output using Scanner and BufferedReader, read strings and integers from keyboard, and print formatted output with System.out.print and printf.

Explore type casting and conversion in Java, covering implicit and explicit casting, narrowing conversions, and practical string-to-integer and integer-to-string examples.

Explore conditional statements in Java, including if, if-else, and switch-case, with practical examples—positive numbers, even/odd checks, and day-based switch logic.

Learn java loops including for, while, and do-while to execute code blocks efficiently, with initialization, condition checks, and updates, demonstrated by printing numbers from 1 to 5.

Learn how break, continue, and label statements control loops in Java by stopping a loop at a condition, skipping a current iteration, and managing nested loops.

Explore nested loops and control flow in Java, using break and continue to manage inner and outer loops. Build 3x3 grid patterns and work with matrix and multidimensional data.

Learn how to initialize arrays, perform linear search, and sort arrays in Java using Arrays.sort in ascending order, and understand indexing and displaying elements.

Explore string initialization and concatenation in Java, and apply string methods such as toUpperCase and equals to manipulate and compare strings.

Explore how to create and use regular expressions in Java by building patterns, compiling them, and using matchers to find, replace, and validate a valid email address efficiently.

Define and call Java methods by creating simple methods with and without parameters, using return values, and invoking them from main to perform arithmetic tasks.

Explore how static variables belong to the class and share data across all instances, and call static methods via the class name without creating objects.

Define classes and create objects in Java using practical examples, such as a card with brand and speed, and a student with name and age, and display their details.

Explore constructors and initialization in Java, including default and parameterized constructors, object creation, and display methods with practical code examples.

Learn encapsulation by protecting private data with getters and setters, explore polymorphism through method overloading and overriding, and master abstraction using abstract classes and flexible blueprints.

Explore abstract classes and interfaces in Java by building a vehicle base class with abstract methods and concrete implementations in car, and a dog and cat example for interface-driven behavior.

Explore Java exception handling with try, catch, finally, and throw; learn to handle division by zero and array index errors, ensure program continues, and implement a custom invalid age exception.

Learn to create and use custom exceptions in Java to represent runtime errors, define a user-defined checked exception, wire it into try-catch blocks, and handle withdrawal scenarios.

Explore the throwable class hierarchy, trigger an arithmetic exception by dividing by zero, print stack traces, and define a custom exception with a catch block to manage errors.

Explore Java list types: ArrayList, LinkedList, and Vector; compare performance for search, insertion, and synchronization, with practical examples of adding and removing elements.

Explore java sets—hash set, linked hash set, and tree set—to store unique elements. Compare unordered versus insertion-ordered behavior and observe alphabetically sorted output.

Explore Java maps: hash map, linked hash map, and tree map, and master key-value storage, ordering, and sorting with practical coding examples.

Explore manual traversal with an iterator and a modern functional approach using streams to filter and collect even numbers, demonstrating hasNext, next, and collectors.toList.

learn to create and write to files with java.io file class and file writer, handling exceptions and confirming messages. list and iterate over directory contents to reveal files and subdirectories.

Learn to read and write text and binary files in Java using java.io, with examples of file writer, buffer reader, and file input/output streams to handle text and binary data.

Learn to read a config.properties file in Java with the Properties class, loading keys like app.name, app.version, and app.author for runtime configuration without modifying source code.

Learn to perform file input and output in Java using buffer reader and file writer, reading text line by line and writing data with try with resources for automatic closure.