Question

Please create two tests classes for the code down below that use all of the methods in the Transaction class, and all of the non-inherited methods in the derived class. Overridden methods must be tested again for the derived classes. The first test class should be a traditional test class named "Test1" while the second test class should be a JUnit test class named "Test2". All I need is to test the classes, thanks!

1. Use a package that contains the Transaction class and its derived classes. Use this package statement:

   package it313.proj4.<<your username>>;
   

   The Test1 and Test2 classes should not be placed in this package.
   
2. You may use Eclipse to generate your constructors, getters, and toString methods for your classes. Recall how to set Eclipse to use the underscore ( _) prefix for instance variables and a prefix for the parameters, such as the if you want one.
   
3. Instance variable information:
   

   Class	Instance Variable	Information
   Transaction	_id	4 digit value identifying the transaction
   Transaction	_seller	Person or organization selling the commodity
   Transaction	_buyer	Person or organization buying the commodity
   Transaction	_amount	Amount paid for the commodity
   Transaction	_memo	Details about the transaction
   Transaction	_timestamp	Date and time of the transaction
   GoldTransaction	_carats	Purity of the gold, value from 1 to 24
   GoldTransaction	_weight	Weight of gold sold in grams
   LumberTransaction	_grade	Grade of lumber, value from 1 (best) to 4
   LumberTransaction	_weight	Weight of lumber sold in tons

4. The Transaction class implements the PurchaseReceipt interface, which inherits from the Comparable interface. This means that in addition to supplying the methods getId, getBuyer, getSeller, and getAmount, a compareTo method must be supplied. It should return 1 if this._id > other._id, it should return -1 if this._id > other._id; it should return 0 if this._id == other._id. Test the compareTo method in theTransaction class to make sure that its objects are compared correctly.
   

• Implement and test the base class Transaction, and the derived classes GoldTransaction, and LumberTransaction.

1. The Transaction class implements the PurchaseReceipt interface, which inherits from the Comparable interface. Test the compareTo method in the Transaction class to make sure that its objects are compared correctly.
2. Implement the Comparable interface for the Transaction class so that the items in the Project 4b TransactionManager collection can be sorted before being returned by the various methods. This means that you must supply a compareTo method.

This is the code:
public interface PurchaseReceipt extends Comparable {

    public int getId();

    public String getBuyer();

    public String getSeller();

    public double getAmount();

}

________________________________________________________________________________

//The Transaction class implements the PurchaseReceipt interface, which inherits from the
// Comparable interface. Test the compareTo method in the Transaction class to make sure that
// its objects are compared correctly.
public class Transaction implements PurchaseReceipt {

    private int _id;
    private String _buyer;
    private String _seller;
    private double _amount;
    private String _memo;
    private String _timestamp;

    public Transaction(int _id, String _buyer, String _seller, double _amount, String _memo, String _timestamp) {
        this._id = _id;
        this._buyer = _buyer;
        this._seller = _seller;
        this._amount = _amount;
        this._memo = _memo;
        this._timestamp = _timestamp;
    }

    public Transaction() {

        _id = 0;
        _buyer = "";
        _seller = "";
        _amount = 0.0;
        _memo = "";
        _timestamp = "";
    }

    public int getId() {
        return _id;
    }

    public String getBuyer() {
        return _buyer;
    }

    public String getSeller() {
        return _seller;
    }

    public double getAmount() {
        return _amount;
    }

    public String get_memo() {
        return _memo;
    }

    public String get_timestamp() {
        return _timestamp;
    }

    @Override
    public String toString() {
        return "ID: " + this.getId() + ", " +
                "Buyer: " + this.getBuyer() + ", " +
                "Seller: " + this.getSeller() + ", " +
                "Amount: $" + this.getAmount() + ", " +
                "Memo: " + this.get_memo() + ", " +
                "Timestamp: " + this.get_timestamp();
    }

    //Implement the Comparable interface for the Transaction class so that the items in
    // the Project 4b TransactionManager collection can be sorted before being returned
    // by the various methods. This means that you must supply a compareTo method.
    @Override
    public int compareTo(PurchaseReceipt purchaseReceipt) {

        return (int) (this.getAmount() - purchaseReceipt.getAmount());
    }
}

________________________________________________________________________________

public class GoldTransaction extends Transaction {

    public int _carats;
    public double _weight;

    public GoldTransaction() {
        super();
    }

    public GoldTransaction(int _id, String _buyer, String _seller, double _amount, String _memo, String _timestamp, int _carats, double _weight) {
        super(_id, _buyer, _seller, _amount, _memo, _timestamp);
        this._carats = _carats;
        this._weight = _weight;
    }

    public int get_carats() {
        return _carats;
    }

    public double get_weight() {
        return _weight;
    }

    @Override
    public String toString() {
        return "ID: " + this.getId() + ", " +
                "Buyer: " + this.getBuyer() + ", " +
                "Seller: " + this.getSeller() + ", " +
                "Amount: $" + this.getAmount() + ", " +
                "Memo: " + this.get_memo() + ", " +
                "Carats: " + this.get_carats() + ", " +
                "Weight: " + this.get_weight() + ", " +
                "Timestamp: " + this.get_timestamp();
    }
}

________________________________________________________________________________

public class LumberTransaction extends Transaction {

    private int _grade;
    private double _weight;

    public LumberTransaction() {
        super();
    }

    public LumberTransaction(int _id, String _buyer, String _seller, double _amount, String _memo, String _timestamp, int _grade, double _weight) {
        super(_id, _buyer, _seller, _amount, _memo, _timestamp);
        this._grade = _grade;
        this._weight = _weight;
    }

    public int get_grade() {
        return _grade;
    }

    public double get_weight() {
        return _weight;
    }

    @Override
    public String toString() {
        return "ID: " + this.getId() + ", " +
                "Buyer: " + this.getBuyer() + ", " +
                "Seller: " + this.getSeller() + ", " +
                "Amount: $" + this.getAmount() + ", " +
                "Memo: " + this.get_memo() + ", " +
                "Grade: " + this.get_grade() + ", " +
                "Weight: " + this.get_weight() + ", " +
                "Timestamp: " + this.get_timestamp();
    }
}

Answer 1

Hey Friend,

Here are the classes you will be needing, I ran out of time writing all the classes, what is now left is to write a test class and instructed and should be pretty straightforward.

Let me know for any questions.

Thank you, and please do give a thumbs up !!

________________________________________________________________________________

public interface PurchaseReceipt extends Comparable<PurchaseReceipt> {

    public int getId();

    public String getBuyer();

    public String getSeller();

    public double getAmount();

}

________________________________________________________________________________

//The Transaction class implements the PurchaseReceipt interface, which inherits from the
// Comparable interface. Test the compareTo method in the Transaction class to make sure that
// its objects are compared correctly.
public class Transaction implements PurchaseReceipt {

    private int _id;
    private String _buyer;
    private String _seller;
    private double _amount;
    private String _memo;
    private String _timestamp;

    public Transaction(int _id, String _buyer, String _seller, double _amount, String _memo, String _timestamp) {
        this._id = _id;
        this._buyer = _buyer;
        this._seller = _seller;
        this._amount = _amount;
        this._memo = _memo;
        this._timestamp = _timestamp;
    }

    public Transaction() {

        _id = 0;
        _buyer = "";
        _seller = "";
        _amount = 0.0;
        _memo = "";
        _timestamp = "";
    }

    public int getId() {
        return _id;
    }

    public String getBuyer() {
        return _buyer;
    }

    public String getSeller() {
        return _seller;
    }

    public double getAmount() {
        return _amount;
    }

    public String get_memo() {
        return _memo;
    }

    public String get_timestamp() {
        return _timestamp;
    }

    @Override
    public String toString() {
        return "ID: " + this.getId() + ", " +
                "Buyer: " + this.getBuyer() + ", " +
                "Seller: " + this.getSeller() + ", " +
                "Amount: $" + this.getAmount() + ", " +
                "Memo: " + this.get_memo() + ", " +
                "Timestamp: " + this.get_timestamp();
    }

    //Implement the Comparable interface for the Transaction class so that the items in
    // the Project 4b TransactionManager collection can be sorted before being returned
    // by the various methods. This means that you must supply a compareTo method.
    @Override
    public int compareTo(PurchaseReceipt purchaseReceipt) {

        return (int) (this.getAmount() - purchaseReceipt.getAmount());
    }
}

________________________________________________________________________________

public class GoldTransaction extends Transaction {

    public int _carats;
    public double _weight;

    public GoldTransaction() {
        super();
    }

    public GoldTransaction(int _id, String _buyer, String _seller, double _amount, String _memo, String _timestamp, int _carats, double _weight) {
        super(_id, _buyer, _seller, _amount, _memo, _timestamp);
        this._carats = _carats;
        this._weight = _weight;
    }

    public int get_carats() {
        return _carats;
    }

    public double get_weight() {
        return _weight;
    }

    @Override
    public String toString() {
        return "ID: " + this.getId() + ", " +
                "Buyer: " + this.getBuyer() + ", " +
                "Seller: " + this.getSeller() + ", " +
                "Amount: $" + this.getAmount() + ", " +
                "Memo: " + this.get_memo() + ", " +
                "Carats: " + this.get_carats() + ", " +
                "Weight: " + this.get_weight() + ", " +
                "Timestamp: " + this.get_timestamp();
    }
}

________________________________________________________________________________

public class LumberTransaction extends Transaction {

    private int _grade;
    private double _weight;

    public LumberTransaction() {
        super();
    }

    public LumberTransaction(int _id, String _buyer, String _seller, double _amount, String _memo, String _timestamp, int _grade, double _weight) {
        super(_id, _buyer, _seller, _amount, _memo, _timestamp);
        this._grade = _grade;
        this._weight = _weight;
    }

    public int get_grade() {
        return _grade;
    }

    public double get_weight() {
        return _weight;
    }

    @Override
    public String toString() {
        return "ID: " + this.getId() + ", " +
                "Buyer: " + this.getBuyer() + ", " +
                "Seller: " + this.getSeller() + ", " +
                "Amount: $" + this.getAmount() + ", " +
                "Memo: " + this.get_memo() + ", " +
                "Grade: " + this.get_grade() + ", " +
                "Weight: " + this.get_weight() + ", " +
                "Timestamp: " + this.get_timestamp();
    }
}