Solution Review: Implement the Rectangle Class Using the Concepts of Encapsulation

// Class Rectangle
class Rectangle {
  // Private Fields
  private int length;
  private int width;
  // Default Constructor
  public Rectangle() {
    this.length = 0;
    this.width = 0;
  }
  // Parameterized Constructor
  public Rectangle(int length, int width) {
    this.length = length;
    this.width = width;
  }
  // Method to calculate Area of a rectangle
  public int getArea() {
    return this.length * this.width; 
  }
  
}
class Demo {
  public static void main(String args[]) {
    Rectangle obj = new Rectangle(2, 2);
    System.out.println(obj.getArea());
  }
}