1920: Abstract Shape

define a Shape class as follows:

1)contains two data fields: color(String type),filled(boolean type)

2)define a no-arg constructor and a constructor with all data fields

3)define two abstract methods,perimeter() and area()

define a Circle class extending Shape class:

1) add a new property, radius

2)define a no-arg constructor and a constructor with all data fields

3)implement the abstract methods : perimeter() and area()

define a Rectangle class extending Shape class:

1) add  two new properties, width and length

2)define a no-arg constructor and a constructor with all data fields

3)implement the abstract methods : perimeter() and area()

Note:

1) the pi for caculating an area of a circle is 3.14159

2) you can  be allowed to create an only object

C red true 4.5
R pink false 3.5 4.8

The circle: red,filled,and perimeter is 28.27,area is 63.62
The rectangle: pink,not filled,and the perimeter is 16.60,area is 16.80