Object-Oriented Programming Using Java

Create a Java class and main method with String[] args, fix the missing parameter error, then compile and run the class to print the value of X on the JVM.

Standardize a Java class by adding an extra method, returning a value, calling it from main, and introducing attributes with private access for proper object-oriented design.

Learn to cast an integer to a double by building a function that takes an integer and returns a double. Call it from main using an object to convert value.

Develop a public Java method that takes an integer, converts it to a string, and returns it, then call the method and print the result, such as '15 hours'.

Generate a random number in a Java program by creating a class with a main method, importing the random class, and using nextInt to print the value.

Test a generated random employee id in Java by implementing a getName method with an if-else chain, returning the employee name or 'not found', using a Random object.

Create a Java method to calculate taxes based on salary using defined business criteria, via a separate class, and return the tax amount to the main program.

Learn to handle multiple conditions with else if statements in Java, mapping input numbers to employee names via a function and integrating results in the main method.

This lecture explains creating a Java application, highlighting object-oriented concepts, class structure, imports, and the auto generated main method when setting up a Java project in the IDE.

Learn to read user input in Java using the scanner class, create a scanner instance, read a number as double, multiply by four, and display the result.

Explore switch case usage in Java to test multiple conditions in a reusable class, with a public getName method using cases one and two, breaks, and a default return.

Develop and test a getGrade method in Java that uses if statements to assign letter grades from scores, reinforcing decision making and reusable code.

Master iteration algorithm by initializing a counter, testing a condition, and incrementing until termination, illustrated through flowcharts and repeated blocks of code in any language.

Learn to compute factorials in Java with a while loop, initializing the counter to one, applying a loop condition and increments, and returning the result.

Explore for loop in Java by implementing a factorial function, receiving user input via scanner, and returning the result from a public double method, with a complete main interaction.

Learn to declare Java arrays with a predefined data type, initialize with curly braces, and access elements by zero-based index in int and string arrays for data handling.

Explore how to programmatically change an array item by index in Java, including creating a helper method and demonstrating array updates in the main program.

Discover how to declare a string array in Java and use its length to find the number of elements, as shown with Egypt, Germany, USA, and France.

Iterate over arrays in Java using a for loop, leveraging the array length and zero-based indices to print each index and value.

Explore how Java implements inheritance by extending a superclass, sharing attributes and methods with a child class, and using calc salary and calc deductions to compute gross salary.

Create a Java class, define attributes and a public get salary method, then instantiate the class in the main method and consume the salary calculation with hours and rate.

Learn how to define a class with attributes and methods, enforce encapsulation by marking attributes private, and auto-generate getters and setters with the integrated development environment.

Define a public class ENC to demonstrate encapsulation, adding attributes like name, telephone, salary, and rate, then contrast direct access with private fields and setter methods.

Explain how to access a private attribute through public setter and getter methods, replacing direct access and enabling safe, reusable class design.

Create and use set and get methods for salary, then implement a public double net salary calculation with taxes, showcasing encapsulation and access via the main method.

Learn to use private attributes with set and get methods to control access, set hours and rate, and compute salary by multiplying hours by rate.

Explore abstraction in object-oriented programming by building a Java abstract class and a subclass, showing how to hide unnecessary data and compute net salary via class methods.

Explore defining abstract methods in an abstract class, extending that class, and implementing the method in a concrete subclass with an override, while noting that abstract classes cannot be instantiated.

Enums in Java provide a special type to hold constants that cannot be changed and cannot be instantiated, with examples of defining values and basic methods.

Explore method overloading in Java, where two methods share the same name but differ in parameter counts or types, with the compiler selecting the correct one at call time.

Define a Java interface by listing only method headers, compare it with abstract classes, and override abstract methods in implementing classes since interfaces cannot be instantiated.

Override all interface methods in a child class and provide their bodies. Instantiate the interface-implementing class and run the program to verify multiply and add results.

Explain class abstraction and abstract classes, including why abstract classes cannot be instantiated and how to use extends to access parent salary and apply deductions.

Explore entity relationship diagrams for modeling customers, accounts, and transactions in a relational database, detailing primary and foreign keys, one-to-many relationships, and table structures.

Load the JDBC driver for your chosen database, such as Microsoft secure server or Oracle database, into your Java application and add it as a library to your project.

Import required modules for database programming in Java. Create a Connection object with DriverManager, then use Statement and ResultSet to execute queries, display data, and handle SQL exceptions.

Learn to create a database connection in Java by loading the SQL Server driver, building a JDBC connection string, and using DriverManager to connect, handling errors with try-catch.

Execute a database query in Java using JDBC: connect, create a statement, run a select on the account table, and iterate the ResultSet to display account details.

Explore the three-tier web application architecture by examining the database, logic, and presentation layers, and how they interact via middleware to support business tasks. Apply server-side and front end roles, from HTML and JavaScript to back end logic and database access, and consider deployment across dedicated machines.