/**
 *
 *		Class, Objects, Instance and Field Variable
 * */
public class Main {

	public static void main(String[] args) {

		Rectangle r1 = new Rectangle();
		r1.setLength(10);
		r1.setBreadth(20);

		Rectangle r2 = r1;
		r2.setLength(50);
		r2.setBreadth(100);

		Rectangle r3 = new Rectangle();
		Rectangle r4 = new Rectangle();
		Rectangle r5 = new Rectangle();

		System.out.println(r1.getBreadth());
		System.out.println(r1.getLength());
	}

}

public class Rectangle {

	int length; // or it can be float
	int breadth;

	public float getArea() {

		float area = length * breadth;
		return area;
	}

	public float findPerimeter() {

		int p = 2 * ( length + breadth );
		return p;
	}

	public int getLength() {
		return length;
	}

	public void setLength(int length) {
		this.length = length;
	}

	public int getBreadth() {
		return breadth;
	}

	public void setBreadth(int breadth) {
		this.breadth = breadth;
	}
}