All phones must have a way of making and then terminating a connection to the phone network; however the exact procedure for doing so depends upon the nature of the phone (e. g. landline, cell phone, satellite phone). Write a abstract class, Phone, that contains a string instance variable, phoneNumber, a constructor that accepts a string parameter initializing the instance variable, an accessor method, getPhoneNumber, that returns the phoneNumber, a toString method that return the phoneNumber in the form # (phoneNumber), and two abstract methods: a boolean-valued method named createConnection that returns a boolean and accepts an reference to an object of type Network, and a void-returning method, closeConnection, that accepts no parameters

Question

Computers & Technology

Ricky

23 October, 15:24

All phones must have a way of making and then terminating a connection to the phone network; however the exact procedure for doing so depends upon the nature of the phone (e. g. landline, cell phone, satellite phone). Write a abstract class, Phone, that contains a string instance variable, phoneNumber, a constructor that accepts a string parameter initializing the instance variable, an accessor method, getPhoneNumber, that returns the phoneNumber, a toString method that return the phoneNumber in the form # (phoneNumber), and two abstract methods: a boolean-valued method named createConnection that returns a boolean and accepts an reference to an object of type Network, and a void-returning method, closeConnection, that accepts no parameters

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Answers (1)

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Harper · Answer 1

Java class is given below

Explanation:

public abstract class Phone

{private

String phoneNumber;

public Phone (String phoneNumber)

{

this. phoneNumber = phoneNumber;

}

public String getPhoneNumber ()

{

return this. phoneNumber;

}

public String toString ()

{

return "# ("+this. phoneNumber+") ";

}

public abstract boolean createConnection (Network n);

public abstract void closeConnection ();

}