Fundamentals Of Object-Oriented Programming: Java & intelliJ

Explore strings, string builder, and string methods, and apply data flow diagrams to Java programs. Use if-else, switch, and ternary operators, loops, arrays, and built-in or custom methods.

Explore strings in Java by declaring variables, measuring length, concatenating, comparing with equals, escaping quotes, using the new string constructor, and formatting output with printf and placeholders.

Explore Java strings: define with new String() or string literals, concatenate, and apply built-in methods: length, index, substring, trim, indexOf, toUpperCase, toLowerCase, equals, and split for arrays and regex-based splitting.

Explore typecasting in Java, including widening (implicit) conversions between byte, short, int, float, and double, and narrowing (explicit) conversions. Learn to convert between integers and strings with Integer.parseInt and String.valueOf.

Explore flow control in Java using if/else and the ternary operator to compare test scores against a pass mark. Read input with a scanner, assign grades, and print results.

Use a switch statement with cases and break to map 1–7 to weekdays. Prompt day input via a scanner, print the weekday, and use default for out-of-range values.

Explore flow control with while, do-while, and for loops in Java, defining an iterator, setting conditions, and printing values while incrementing or decrementing as shown.

Explore how break and continue control flow in while and for loops in Java, showing how break exits loops and continue skips specific iterations by value of i.

Explore arrays in Java to store multiple values in a variable with zero-based indexing. Use for loops and for-each loops to print, modify, and set int, double, and string arrays.

Learn how to define and call methods in Java to reuse code, covering signatures, static and public modifiers, overloading, return types, and practical examples like greeting, average, and min.

Create an int array of four scores, read input with a Scanner in a for loop, and print the sum and the average (cast to double).

Create a Java program that finds the maximum value in an int array using a public static int method and a for loop, with the main method printing the result.

Explore strings, string builder, and string methods to manipulate data, examine data flow diagrams, and apply if else, switch, and ternary operators with loops, arrays, and Java programs.

Explore classes and objects, constructors and getters/setters, abstract classes vs interfaces, and inheritance and polymorphism while working with lists and ArrayList, file I/O, predicates, lambdas, and exception handling.

Discover how classes serve as blueprints for objects in Java, and how state and behavior define real world instances, using constructors, this, getters, setters, and object instantiation.

Explore constructors that initialize objects from a class blueprint and enforce encapsulation. Learn about getters and setters, default, parameter-based, and overloaded constructors, and the this keyword's role in access control.

Explore the four pillars of object-oriented programming—encapsulation, abstraction, polymorphism, and inheritance—through Java examples like an abstract shape class, circle, and rectangle, with notes on access modifiers and the abstract keyword.

Learn how inheritance works in Java by extending a student class to create an undergrad subclass, access protected fields, compute the average, and use setters and getters for email.

Explore multilevel inheritance from vehicle to car to sports car, implement constructors, properties, and methods like accelerate and get details, and demonstrate polymorphism through method overriding and the super keyword.

Explore abstract classes in Java by modeling shapes with a shape abstract class and concrete Circle and Rectangle classes, implementing draw, get area, and get perimeter through inheritance.

Interfaces in Java are contracts, a reference type with constants and method signatures, implemented by classes such as a person or dog via a walkable, workable interface.

explains static and final constants, and how to combine them to create constants in Java; introduces enums, predefined constants, constructors, fields, methods, and using values, ordinal, and dot access.

Explore the java collections framework, built from interfaces, implementations, and algorithms to store, retrieve, and manipulate elements through the root collection and subinterfaces like list, queue, and set, including ArrayList.

Explore how Java handles runtime errors by creating exception objects, and learn to manage them with try-catch-finally blocks, using division by zero as a practical example.

Master file handling in Java and IntelliJ by creating files with the file class and file output stream using try-catch blocks, and appending content with buffered writer while handling exceptions.

Build a day-based program using an enum for the week and a day checker that prints a unique message for each day via a switch.

Explore classes and objects, setters and getters, constructors, inheritance, interfaces, and polymorphism, then practice ArrayList usage, file input and output, predicates, lambdas, and defensive programming.

Explore UML diagrams in real-world programs. Build an ATM simulation and payroll system, and learn to use GitHub for version control and career development.

The lecture builds a payroll system with an abstract employee base class, salaried and hourly subclasses, a payable interface, and address aggregation, implemented in IntelliJ with Java.

Update the payroll management system by modeling department and company relationships with aggregation and composition, implement department and company classes, and enable pay calculation for salaried, hourly, and contractor employees.

Implement the pay stub generation for salaried employees in a payroll system, detailing company data, date formatting, and string construction to print and save stubs.

Learn to set up git and GitHub for a java project in IntelliJ, enable version control, commit changes with clear messages, manage ignore rules, and share the repository on GitHub.

Learn how to group employees by department in a Java payroll system, adjusting access to the department field, using streams and collectors to produce department-wise lists, and formatting output.

Implement an ATM simulation in Java by building a bank account model with a transactions interface, a base account class, and savings and checking subclasses, including withdraw, deposit, and balance.

Create a separate user prompts class to decouple the ATM interface, validate PIN, and present a main menu with withdraw, deposit, balance, and exit options.

Learn inheritance in Java by turning the account class into an abstract base and deriving savings and checking accounts with interest and fees, while supporting deposits, withdrawals, and balance updates.

Implements a transactions log for the ATM project, recording deposits and withdrawals to a file, formatting dates for readability, and enabling reading and printing the history.

Push an ATM simulation project to GitHub in one go from IntelliJ by sharing the project, selecting files for the initial commit, and adding a readme for your portfolio.

Apply concepts from real-world simulations, including ATM and payroll system, and use GitHub version control. Explore next steps in Java trends, Spring framework, Mendix low-code, Android development, and freelance opportunities.