Question

Write a Java program to perform the below

a)Create class "Rectangle" with the fields "length, width".
b)Create a parameterized constructor and initialize the fields.
c)Create a method "RectArea" to return the area of a rectangle (length x width)
d)Create a method "displayInfo" to display the length and width and area of a rectangle
e)Create an object in the driver class (Main class) and invoke to initialize the constructor and method to display the output.

Answer 1

To solve this task, you can create a class called 'Rectangle' in Java with the given requirements. This class should have fields for length and width, a parameterized constructor to initialize those fields, methods to calculate the area of the rectangle and display the information, and an object in the driver class to initialize the constructor and display the output.

Step-by-step explanation:

In Java, you can create a class called "Rectangle" with the fields "length" and "width". To do this, you would declare two instance variables inside the class:

public class Rectangle {
private int length;
private int width;
// rest of the code
}

You can then create a parameterized constructor to initialize the fields:

public Rectangle(int length, int width) {
this.length = length;
this.width = width;
}

To calculate the area of the rectangle, you can create a method named "RectArea" that multiplies the length and width:

public int RectArea() {
return length * width;
}

Lastly, you can create a method named "displayInfo" to display the length, width, and area of the rectangle. This can be done using:

public void displayInfo() {
System.out.println("Length: " + length);
System.out.println("Width: " + width);
System.out.println("Area: " + RectArea());
}

In the driver class (main class), you can create an object of the Rectangle class and invoke the constructor and displayInfo method to initialize the fields and display the output:

public class Main {
public static void main(String[] args) {
Rectangle rectangle = new Rectangle(5, 10); // Example values
rectangle.displayInfo();
}
}