Classes and Objects (Exercise 1)

Java Programming: Java Exercise on Classes and Objects
Topics Discussed:
1. Implementing a Rectangle Class in Java.
2. Creating an array of 3 Rectangles filled by the user in Java.

Music:
Axol x Alex Skrindo - You [NCS Release]

#JavaByNeso #JavaProgramming #OOP #ClassesAndObjects

[a.human.]

Dude, you'e an absolute god send, this video summed up everything we learned in the last few videos and for the first time, the whole concept of OOP is starting to make sense to me, thanks a ton!

[BinkingThig]

I have an exam tomorrow and this helped me. Thanks man!

[petrusmoshweulaka]

Hello I love your teaching, don't you teach javascript?

[brocklesnarufcchamp]

How to make methods of the last two codes?

[Code_Solver]

If you don't, Please explain OOPS in C++. Please please

[ryanchristopheredquila]

Can you help me with this?

Main.java:15: error: no suitable constructor found for Rectangle(double, double)
rectangles[i] = new Rectangle(input.nextDouble(), input.nextDouble());
^
constructor Rectangle.Rectangle(int, int) is not applicable
(argument mismatch; possible lossy conversion from double to int)
constructor Rectangle.Rectangle(Point, Dimension) is not applicable

[sr-sunny-raj]

Sir, Please try to upload the videos faster.

[calvinclarkjr]

what does the key word 'this' mean

[suswithcherry]

package rectangle;

public class Rectangle {
private double width;
private double height;

public Rectangle() {
this(1, 1);
}

public Rectangle(double width, double height) {
if(width >= 0)
this.width = width;
else
this.width = 1;

if(height >= 0)
this.height = height;
else
this.height = 1;
}

public void setWidth(double width) {
this.width = (width >= 0) ? width : this.width;
}

public double getWidth() {
return width;
}

public void setHeight(double height) {
this.height = (height >= 0) ? height : this.height;
}

public double getHeight() {
return height;
}

public double getArea() {
return width * height;
}

public double getPerimeter() {
return 2*(width + height);
}
}

[suswithcherry]

import rectangle.Rectangle;
import java.util.Scanner;

class Test {

public static void fillTheArray(Rectangle[] arr) {
Scanner input = new Scanner(System.in);

for(int i = 0; i < 3; i++) {
System.out.print("Enter the width of Rectangle " + i + " : ");
double width = input.nextDouble();
System.out.print("Enter the height of Rectangle " + i + " : ");
double height = input.nextDouble();
System.out.println();

arr[i] = new Rectangle(width, height);
}
}

public static void arr) {
for(int i = 0; i < 3; i++) {
Rectangle r1 = arr[i];
System.out.println("Area of Rectangle " + i + " = " + r1.getArea());
System.out.println("Perimeter of Rectangle " + i + " = " + r1.getPerimeter());
System.out.println();
}
}

public static void main(String[] args) {
Rectangle[] arr = new Rectangle[3];
fillTheArray(arr);
System.out.println();
printAreaAndPerimeter(arr);
}
}

[surajrenake]

Sir, your English is from korean?
😆😆😆