Answer:
class Rectangle{
 //private attributes of length and width
 private double givenLength;
 private double givenWidth;
 // constructor to initialize the length and width
 public Rectangle(double length, double width){
  givenLength = length;
  givenWidth = width;
}
 // setter method to set the givenlength
 public void setGivenLength(double length){
  givenLength = length;
}
 // setter method to set the givenWidth
 public void setGivenWidth(double width){
  givenWidth = width;
}
 // getter method to return the givenLength
 public double getGivenLength(){
  return givenLength;
}
 // getter method to return the givenWidth
 public double getGivenWidth(){
  return givenWidth;
}
 // method to calculate area of rectangle using A = L * B
 public void calculateArea(){
  System.out.println("The area of the rectangle is: " + getGivenLength() * getGivenWidth());
}
 // method to calculate perimeter of rectangle using P = 2 * (L + B)	
 public void calculatePerimeter(){
  System.out.println("The perimeter of the rectangle is: " + 2 * (getGivenLength() + getGivenWidth()));
}
}
public class MyRectangleClassProgram{
 public static void main(String args[]){
 
 //rectangle1 object is created
 Rectangle rectangle1 = new Rectangle(10.0, 5.0);
 //rectangle2 object is created
 Rectangle rectangle2 = new Rectangle(7.0, 3.0);
 //area for rectangle1 is calculated
 rectangle1.calculateArea();
 //perimeter for rectangle1 is calculated
 rectangle1.calculatePerimeter();
 //area for rectangle2 is calculated
 rectangle2.calculateArea();
 //perimeter for rectangle2 is calculated
 rectangle2.calculatePerimeter();
}
}
Explanation:
Two file is attached: Rectangle.java and MyRectangleClassProgram.java
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java
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