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(Solved) Background: In the code distributed on March 22, in class Intersection, two new "getter" methods have been added, outgoingsize( ) and...


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1. Background: In the code distributed on March 22, in class Intersection, two new “getter" methods have been added, outgoingsize( ) and outgoingGet( ). There is also a
public 'setter‘ method, addOutgoing( ). These three methods operate on the final private list outgoing. a) This means that we have public ‘setter' and 'getter' methods to operate on outgoing. That suggests that outgoing might as well be public. Give examples of operations on
outgoing that are forbidden to the public as a result of forcing the public to use these methods. (0 .5 points) b) But the list outgoing is already declared as final. This would seem to imply that outgoing is read-only. Give an example of an operation on outgoing that is forbidden by
declaring it to be final, and give some examples of operations that change outgoing that are still permitted despite its being final. (0.5 points) 2. Background: Consider the following code to simulate the arrival of a vehicle at the entrance to a road: public void arrivalEvent( float time, Vehicle v ) {
Simulation . schedule(
time + travel’l‘ime,
(float t)->this.departureEvent( t, v ) } A problem: Rewrite the above code so that it does not use a lambda expression. This will require defining an inner class that implements Simulation.Action and then passing an
instance of that class. Do it with an explicitly named inner class. (0.5 points)

 


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