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Find Largest Shape
`class FindLargestShape{    public static void main(String arg[])    {        Rectangle r = new Rectangle(10, 4);        Square s = new Square(7);        Circle c = new Circle(3.5);                System.out.println("Rectangle Area : " + r.getArea());        System.out.println("Square Area : " + s.getArea());        System.out.println("Circle Area : " + c.getArea());        System.out.println();                if ((r.getArea() > c.getArea()) && (r.getArea() > s.getArea()))        {            System.out.println("Rectangle has the largest area.");        }        else if( s.getArea() > c.getArea() )        {            System.out.println("Square has the largest area.");        }        else        {            System.out.println("Circle has the largest area.");        }        }}class Rectangle{    double length;    double breadth;    Rectangle(double length, double breadth)    {        this.length = length;        this.breadth = breadth;    }    double getArea()    {        return length * breadth;    }}class Square{    double side;    Square(double side)    {        this.side = side;    }    double getArea()    {        return side * side;    }}class Circle{    double radius;    Circle(double radius)    {        this.radius = radius;    }    double getArea()    {        return (22.0/7.0) * radius * radius;    }}`
OUTPUT

Rectangle Area : 40.0
Square Area : 49.0
Circle Area : 38.5

Square has the largest area.

DESCRIPTION

Here we have created three shape classes - `Rectangle`, `Square` and `Circle`. `Rectangle` has `width` and `breadth`, `Square` has `side` and `Circle` has `radius` as there respective member variables. All the classes have `getArea()` method implemented accordingly. In the `main` method of `FindLargestShape`, we have created one object for every class and compared their area's. The shape with largest area is printed. The areas of all these shapes are also printed for comparison.

THINGS TO TRY
• In the `main` method of `FindLargestShape`, create two more shapes - one shape object of type `Rectangle` and one shape object of type `Circle`. Compare these two objects with the existing three objects and find the shape with largest area. Observe that the `if-else` conditions become complex when comparing the areas of five shapes.
• Add `double getPerimeter()` method in all the three classes - namely `Rectangle`, `Square` and `Circle`. Change the `main` method in `FindLargestShape` to compare the perimeters and print the shape with largest perimeter.