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14 Nov 2018

2. In a class that defines a new data type, you will not get a compile-time error if you do not define a constructor. (A) FALSE (B) TRUE

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Nestor Rutherford
Nestor RutherfordLv2
15 Nov 2018
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12. What will the following print ? public class Test public static void main (String[] args) boolean bl = true; boolean b2 = false; boolean b3 = true; if ((bl && b2) || (b2 && b3) || b2) System.out.print("ok"); if ((bl && b2) || (b2 && b3) 11 (bl || b2)) System.out.println("dokey"); (A) No output is produced (B) ok (C) dokey (D) Compile-time error (E) ok dokey

Programming Writing Montreal Maps In the following questions, you will write classes that allow one to suggest a route to get from one point to another on a metro or train line. Note that for all of these questions, we will make the simplifying assumption that the earth is flat and that everything resides in 2 dimensions. (There were metros before Columbus and Galileo, right?) 6. Write a class MetroStation in which you define a new type MetroStation. (10 points) A MetroStation is defined to have the following private properties: • String name This represents the name of the metro station (e.g. Atwater, McGill, etc) • double xPosition This represents the x location of the metro station. • double y Position This represents the y location of the metro station. An MetroStation object should have the following public methods/behaviors defined on it. • A constructor that takes as input a String stationName, a double x, and a double y. The constructor should initialize the properties name, xPosition, and yPosition to these three values respectively • A method getName() which returns the name of the Metrostation. • A method get XPosition () which returns the x location of the Metrostation • A method get Position () which returns the y location of the Metrostation • A method equals (Metrostation other) which returns a boolean representing whether the name property of the this MetroStation is equal to the name property of other.

2)What code would you add if you wanted to change it so that the user was able to continue entering a filename until the method initialize InventoryFromFile could successfully be exceuted? (e) Suppose I have the following class definition: 1 1/A TelevisionShow is a new type that consists of a String) for the actors |/ /a String for the name, and a string for the network public class Television Show private String[] actors; private String name; private String network; //this method will return whether or not the property //actors contains actor Name or not public static boolean hasActor (String actor Name) for (int i-0; i < actors.length; i++) { if (actors[i].equals (actorName)) { return true; return false; Unfortunately, when I try to compile this code, I get the following error: Television Show.java:11: non-static variable actors cannot be referenced from a static context for (int i=0; i < actors.length; i++) { Television Show.java:12: non-static variable actors cannot be referenced from a static context if (actors[i].equals(actorName)) { 2 errors What does this error mean and how can I fix it?

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