Question

In Java PLS

HW7: Feature Comparison CSS 142 Computer Programming 1 By: Hansel Ong Summary With so many options for most anything nowadays (phones, cars, hotels, schools, courses, etc.) consumers have become accustomed to selecting a few objects (e.g. smart watches) to compare the features. Write a simple "Device" class with a few features that could be used to compare Device instances and a Driver class with which to test/drive this "Device" class. Skills Expected All the skills from previous assignment(s) Multi-dimensional array . Constructor and method overloading Assignment Description (and grading criteria) You will create two Class objects (and subsequently submit two.java files) Device Driver Notes: ONLY the Driver Class should have static methods. . The Device Class should NOT have static methods. The Device Class should NOT have static instance variables (Constants permitted). . The below is the minimum you must include-you could include additional instance variables, methods, etc. as you need. Class Design: Device The Device class is intended to be an abstract and simplified representation of a device. Each device will have a multi-dimensional array of "features" - which contain the feature name (e.g. "Storage Size") in one row and the feature data (e.g. "64GB" in another rovw Data to Store (2 Points) Device Name private instance variable with public setter/getter · (2 Points) Features List (eg. String[][]) → private instance array with neither getter nor setter Actions Constructor (1 Point) Take in as argument the device name (enforce invariants) (1 Point) Initialize the features list to have at least 10 columns and 2 rows o o Overloaded Constructor o (2 Points) Take in as argument the device name as well as features list (enforce invariants) (2 Points) Add Feature o Take in as argument the feature name and value and o If the feature name is NOT already in the list of features, add both the name and value to the list of features If the feature name is already in the list of features, update the value to include the previous value as well as the new valuee o (2 Points) Get Feature Value o Take in as argument a feature name and return the value associated with the feature if round. Return “Feature not found" as appropriate (2 Points) Get Feature Value o Take in as argument an index value and return the value associated with feature for the given index. Be sure to check for invariants. (2 Points) Show Features Print out a "table" of features for the current Device instance o Class Design: Driver "Positive" testing (checking for "valid" conditions) o [1 Point] Create a Device with only device name o [1 Point] Create a Device with both a device name as well as a feature list o [1 Point] Add at least three new features (with different values) to all device instances o [1 Point] Get a feature value based on the feature name o [1 Point] Get a feature value based on the index o [1 Point] Print out the list of features "Negative" testing (checking for "invalid" conditions) o [1 Point] Attempt to create a Device with "invalid" device name (e.g. empty string) o [1 Point] Attempt to create a Device with "invalid device name and/or feature list o [1 Point] Attempt to add a feature that has already been added to the feature list o [1 Point] Attempt to get the value for a feature not in the feature list o [1 Point] Attempt to get the value for a feature given an invalid index (e.g. -1) . "Boundary" testing o [1 Point] Attempt to create a Device with a feature list that is exactly at capacity o [1 Point] Attempt to create a Device with a feature list that exceeds capacity (e.g. 11 columns) o [1 Point] Attempt to add a feature with invalid name/value o [1 Point] Attempt to show features when the feature list has nothing in it yet Grading Criteria [12 Points] Device class (See Assignment Description for breakdown of points) [15 Points] Driver class (See Assignment Description for breakdown of points) [1 Points] Method JavaDoc (comment block) containing at minimum: description of method and @param and @return [1 Point] Descriptive variable names . [1 Point] Appropriate class header comment block

Answer 1

Thanks for the question.
Here is the completed code for this problem. Let me know if you have any doubts or if you need anything to change.
Thank You !!
================================================================================================

public class Device {

    private String deviceName;
    private String[][] features;
    private int featureCount;

    public Device(String deviceName) {
        setDeviceName(deviceName);
        features = new String[2][10];
        featureCount = 0;
    }

    public String getDeviceName() {
        return deviceName;
    }

    public void setDeviceName(String deviceName) {
        if (deviceName == null || deviceName.trim().length() == 0) {
            throw new IllegalArgumentException("Device Name cannot be null or empty");
        }
        this.deviceName = deviceName;
    }

    public void addFeature(String featureName, String featureValue) {
        if (featureName == null || featureName.trim().length() == 0) {
            System.out.println("Invalid feature name.");
            return;
        }
        if (featureCount < 10) {
            // check if the feature exists
            for (int col = 0; col < featureCount; col++) {
                if (features[0][col].equalsIgnoreCase(featureName)) {
                    features[1][featureCount] = featureName;
                    return;
                }
            }
            // if feature dont exist add a new entry
            features[0][featureCount] = featureName;
            features[1][featureCount] = featureValue;
            featureCount += 1;
        }
    }

    public String getFeatureValue(String featureName) {
        if (featureName == null || featureName.trim().length() == 0) {
            System.out.println("Invalid feature name.");
            return "Feature not found";
        }
        for (int col = 0; col < featureCount; col++) {
            if (features[0][col].equals(featureName)) {
                return features[1][col];
            }
        }
        return "Feature not found";
    }

    public String getFeatureValue(int index) {
        if (index < 1 || index > featureCount) {
            return "Feature not found";
        }
        return features[1][index - 1];
    }

    public void showFeatures() {

        System.out.println("Device Name: " + getDeviceName());
        if (featureCount == 0) {
            System.out.println("No Feature exist.");
            return;

        }

        System.out.println(String.format("%-15s%15s", "Feature Name", "Feature Value"));
        for (int col = 0; col < featureCount; col++) {
            System.out.println(String.format("%-15s%15s", features[0][col], features[1][col]));
        }

    }
}

================================================================================================

public class DeviceDriver {

    public static void main(String[] args) {

        Device dell = new Device("Dell");
        Device hp = new Device("HP");
        hp.addFeature("RAM","8GB");
        hp.addFeature("Hard Disk","1024 GB");
        hp.addFeature("Processor","Quad Core");
        System.out.println("HP Hard Disk Value: "+hp.getFeatureValue("Hard Disk"));
        System.out.println("HP Feature at index 3: "+hp.getFeatureValue(3));
        hp.showFeatures();

        try{
            Device lenevo = new Device("");
        }catch (IllegalArgumentException exception){
            System.out.println(exception.getMessage());
        }

        // feature all exist
        hp.addFeature("RAM","16GB");
        System.out.println("HP RAM Value: "+hp.getFeatureValue("RAM"));
        // feaure dont exist
        System.out.println("HP Operating System Value: "+hp.getFeatureValue("OS"));
        // negative index -1
        System.out.println("HP Feature at index -1: "+hp.getFeatureValue(-1));
        // boundary
        hp.addFeature("Feature 4","Feature Value 4");
        hp.addFeature("Feature 5","Feature Value 5");
        hp.addFeature("Feature 6","Feature Value 6");
        hp.addFeature("Feature 7","Feature Value 7");
        hp.addFeature("Feature 8","Feature Value 8");
        hp.addFeature("Feature 9","Feature Value 9");
        hp.addFeature("Feature 10","Feature Value 10");
        hp.showFeatures();
        // one more feature
        hp.addFeature("Feature 11","Feature Value 11");
        hp.showFeatures();

        // negative testing
        hp.addFeature(null,"Null Value");
        dell.showFeatures();



    }
}

================================================================================================

DeviceDriver un: "C:\Program Files Java\jdk-11kbin\java.exe" "-javaagent:C:\Prog HP Hard Disk Value: 1024 GB HP Feature at index 3: Quad Core Device Name: HP Feature Name Feature Value RAM 8GB 1024 GB Hard Disk Processor Quad Core İ Device Name cannot be null or empty HP RAM Value: 8GB HP Operating System Value: Feature not found HP Feature at index -1: Feature not found Device Name: HP Feature Name Feature Value RAM 8GB Hard Disk 1024 GB Quad Core Processor Feature 4 Feature Value 4 Feature 5 Feature Value 5 Feature 6 Feature Value 6 Feature 7 Feature Value 7 Feature 8 Feature Value 8 Feature 9 Feature Value 9 Feature 10 Feature Value 10 Device Name: HP Feature Name Feature Value RAM 8GB Hard Disk 1024 GB Quad Core Processor Feature 4 Feature Value 4 Feature 5 Feature Value 5 Feature 6 Feature Value 6 Feature 7 Feature Value 7 Feature 8 Feature Value 8 : Terminal 4: Run 6: TODO 0: Messages Compilation completed successfully in 1 s 927 ms (moments ago)

DeviceDriver Run: vice Name cannot pe null or empty T HP RAM Value: 8GB HP Operating System Value: Feature not found HP Feature at index -1: Feature not found Device Name: HP Feature Value ะเ Feature Name RAM 8GB Hard Disk 1024 GB Processor Quad Core Feature 4 Feature Value 4 Feature Value 5 Feature 5 Feature 6 Feature Value 6 Feature 7 Feature Value 7 Feature 8 Feature Value 8 Feature 9 Feature Value 9 Feature 10 Feature Value 10 Device Name: HP Feature Name Feature Value 8GB RAM Hard Disk 1024 GB Processor Quad Core Feature 4 Feature Value 4 Feature Value 5 Feature 5 Feature 6 Feature Value 6 Feature 7 Feature Value 7 Feature 8 Feature Value 8 Feature 9 Feature Value 9 Feature 10 Feature Value 10 Invalid feature name. Device Name: Dell No Feature exist. Process finished with exit code 0 6: TODO Terminal 0: Messages 4: Run Compilation completed successfully in 1 s 927 ms (a minute ago)

thanks !