Description: The program has a parent class Telephone, class contains phone brand, telephone number, time of call, rates and other attributes, as well as the calculation of charges and display information method program and a subset of Mobilephone, in addition to having the properties of the Telephone class, also has its own attributes such as the network type, called time, at the same time it has his calculation of charges and method of displaying information. Finally the program should include a master class to use the above two categories and display their information.
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090360105+周润+Phone\Mobilephone.class
....................\Ok.class
....................\Ok.java
....................\Telephone.class
090360105+周润+Phone
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