写一个父类图形（Shape）（无属性，方法：计算周长，计算面积），



两个子类：矩形（Rect 属性：长，宽；方法：计算周长，计算面积）,

圆形（Circle 属性：半径 方法：计算周长，计算面积）



并写一个测试类TestShape,含main方法，创建各个类的对象，用参数化构造方法为属性赋值，输出各个图形的周长和面积。-Write a parent class graphics (Shape) (no properties, methods: calculating perimeter, area calculation), two sub-categories: rectangular (Rect attributes: length, width　method: calculation of perimeter, area calculation), round (Circle Properties : radius　method: calculation of perimeter, area calculation) and write a test class TestShape, including the main method to create each type of object, parameterized constructor for the attribute assignment, the output of each graphic in the perimeter and area.