Topic: 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) voidconverse (charc), then define a method charlocation (intposition), obtained by integer position in Unicode character set corresponding characters, define the Father class a subclass of the Child, the Child in the class voidconverse rewriting method (charc), complete parameter c characters and digital transformation, defined in the main class App Child class objects, called converse method and location method,