Java Tutorial For Beginners 25 - Inheritance in Java

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[jatindhawan]

It's the time of quarantine and I'm watching this video with my last pair of working earphones and this video increased my heart beat for some time. If you know you know.

[lisam]

I thought my headphones were broken, so then I went on a 10-minute search to find other headphones, then realized they were broken too. Then I read the comments. Lesson: read the comments first.

[cmurray]

You should change the batteries in  your smoke alarm.

[oliverwaller]

Get creative with it. Only a few hours in and I feel like I am learning quite a bit. Try getting user input for height and width like this one:


public static void main(String[] args) {

Rectangle rec = new Rectangle();

System.out.println("Area of a Rectangle");
System.out.println("
System.out.println("| |");
System.out.println("| |");
System.out.println("| |");
System.out.println("
System.out.println("Enter height of Rectangle");
Scanner scan = new Scanner(System.in);
double user_input_rec_height = scan.nextDouble();


System.out.println("Enter width of Rectangle");
Scanner scan1 = new Scanner(System.in);
double user_input_rec_width = scan.nextDouble();


rec.height = user_input_rec_height;
rec.width = user_input_rec_width;
System.out.println("The area of the rectangle is " +rec.area());


Triangle tri = new Triangle();
System.out.println("Area of a Triangle");
System.out.println(" <>");
System.out.println(" [][]");
System.out.println(" [] []");
System.out.println(" [] []");
System.out.println(" [] []");
System.out.println(" [] []");
System.out.println(" [][][][][][][]");
System.out.println("Enter height of Triangle");
Scanner scan2 = new Scanner(System.in);
double user_input_tri_height = scan.nextDouble();


System.out.println("Enter width of Triangle");
Scanner scan3 = new Scanner(System.in);
double user_input_tri_width = scan.nextDouble();


tri.height = user_input_tri_height;
tri.width = user_input_tri_width;
System.out.println("The area of the rectangle is " +tri.area());

[tabishkhan]

Excellent videos. Kindly look into the audio issues, please. :)

[anishaa]

love this tutorial. but that smoke alarm is driving me nuts

[xmodcamaro]

hey for the past couple of videos theres static in the right side for sound. the only sound coming is from the left. thank you 

[dotripleg]

Great video. Youre very clear and easy to understand. Please change your smoke detector battery

[nadimbaraky]

There's a small issue in the area() in Rectangle class. You must cast the height*width to (double) before dividing by 2.
Here by chance the result was true. If it were say 50.xx it'll be also 50. Since it's applying "Integer division" & then, returning it as a double.

[angelhadzhiev]

Bro i can tell you that you explain everything better than my professor :D i love your videos :)

[tessythomas]

Thank you so much Sir... For this excellent lecture... I knew nothing before 😊

[sophiaman]

I am not the only one who looked for another pair of earphones. LOL.

[tejeshkumarreddy]

can u tell me who is better to deliver good Java classes in online

[beawarehelp]

6:40 .. Polygon class is called Base class and Rectangle class is called derived class

[jbb]

Awesome Video man!! thanks a bunch, got me out of a pinch

[shrnrockz]

I don't know why but this is only audible in right ear but not left, first I thought it's my earpiece fault, but it's working fine, please correct the audio settings of your video

[parijatdhar]

Actually, this is an example of hierarchical inheritance as the super-class is inherited by both sub-classes.

[toa]

For those hearing only with left ear, just half- plugged your headphone and it would be a lot better xD

[Songoku-hgbc]

bro, you are teaching inheritance using packages ???

[shivanandk]

Have you removed your videos on composition/aggregation? I remember it was there earlier..