Regardless of the type of communications device, there must be a way to transmit and receive data. Define an interface, CommDevice, with two methods : transmit, that accepts two parameters — reference to a Destination object , and a string (in that order), and returns a boolean; and receive, that accepts a parameter of type Duration, and returns a reference to a String.

LANGUAGE: JAVA

CHALLENGE:

Regardless of the type of communications device, there must be a way to transmit and receive data. Define an interface, CommDevice, with two methods : transmit, that accepts two parameters — reference to a Destination object , and a string (in that order), and returns a boolean; and receive, that accepts a parameter of type Duration, and returns a reference to a String.

SOLUTION:

interface CommDevice
{
    public boolean transmit( Destination d, String s);
    public String receive( Duration d );
}

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