Java Java CISC 3120 CUNY Brooklyn College 1. In the two code snippets below, whi

Question

Java Java CISC 3120 CUNY Brooklyn College 1. In the two code snippets below, which case is of the "composition pattern, and which "inheri tance"? Case 1 public class Thermostat I private Temperat ureSensor sensor public Thermostat ) I sensor = new TemperatureSensor ("Nest"); publie double getFarenheit O return sensor.measure ) toFarenheit O Case 2 public elass Thermostat extends TemperatureSeasor publie Termostat (String mansfacturer) super manufacturer //somE code below represented b private Temperature measure) Temperaturenew Temperature) /soNE code below, represented by... return t; public double getFarenheit return measure) toFarenbeit 2. The following code has at least two major errors. What are they? Suggest a way to fix it publie elass Sensor public abstract Temperature measure) //some correct code below, represented by public static void main (String args) Sensor sensor- new Sessor // some correct code below, represented b9 3. Write an interface, PointingDevice, containing e an abstract method, getXCoord that returns an int e an abs e an abstract method, attentionRequired that returns a boolean ean abstract method, set Resolution that accepts a double and returns a double tract method, getYCoord tha t returns an int

Explanation / Answer

Question 1:Composition Pattern/Inheritance Pattern

Case 1 is Composition Pattern

Case 2 is Inheritance Pattern

Question 2: Major Errors

-The Class Sensor must be an abstract class to define abstract methods

- Abstract methods do not specify a body

- Temperature cannot be resolved to a type

Question 3: Interface PointingDevice

public interface PointingDevice {

public abstract int getXCoord();

public abstract int getYCoord();

public abstract boolean attentionRequired();

public abstract Double setResolution(Double res);

}

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