Java OOP Tutorial - Part 1: Superclass (Vehicle Class) #Java #Programming Coding

In this video, I started with the foundation of Object-Oriented Programming in Java by building a superclass called `Vehicle` — the blueprint that other classes will inherit from.

You’ll learn:
How to define fields
How to write a parameterized constructor
How to create basic methods like accelerate() and brake()

This is the first part of a 3-part series. Stay tuned for the subclass and main program logic!

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#Java #OOP #Programming

Line 2: class Vehicle — defines the superclass named Vehicle.

Lines 3–6: declares attributes (fields) for the Vehicle class.

Line 8: Parameterized constructor that initializes the fields of the Vehicle class.

Lines 9 to 12: Initialize object fields using constructor parameters (this keyword refers to current object).

Line 13: print statement inside the constructor outputs a message when Vehicle object is created.

Line 16: non-parameterized method named accelerate

Line 17: print statement inside the accelerate method.

Line 18: increases the speed of the current object’s field by 5.

Line 21: non-parameterized method named brake.

Line 22: print statement inside the brake method.

Line 23: decreases the speed of the current object’s field by 5.

Line 26: parameterized method named turn, takes a String argument direction and prints the turn direction passed as a parameter to turn().

public void turn(String direction) {
}

NB
The turn() method takes an argument because it requires input (direction) while accelerate() and brake() use fixed logic.

Line 30: Non-parameterized method named getSpeed that returns an int value (speed).

Line 31: Returns the value of the speed field of the current object (instance of Vehicle).