Write an application, the Father class defined in a judgment and case according to the case to complete the transformation method (, capital is converted to lowercase) void converse (char c), then define a method char location (int position), obtained by integer position in Unicode character set corresponding character, define the Father class a subclass of the Child, the Child in the class void converse (char c) rewrite method, complete parameter c characters and digital transformation, defined in the main class App Child class objects, called converse method and location method,