Question

(Enable the Account class comparable & cloneable)

@ Create ComparableAccount class inheritance from the Account class, and implemented the comparable and cloneable interfaces. Override the compareTo method to compare the balance of two accounts. Print the Account ID, balance and dataCreated information from the toString() method.

Implements the cloneable interface and override the clone method to perform a deep copy on the dateCreated field.

Write a driver program to create one array contains 5 ComparableAcccount objects (account #: 1001-1005, initial balance=$1000). Make deposit $500 to each account, and withdraw $100 - $500 for each account. Clone all 5 accounts (before sort) into a new array - use a for-loop.

Print out each object info from the cloned array, and use the “==“ operator, and compareTo() to compare the dateCreated field of each object from both arrays. Use sort method on the original array (or ArrayList), and print out object info.

• For an array, use Arrays.sort(array); for an ArrayList, use Collections.sort(arrayList).

• codes (Account.java, ComparableAccount.java, and Assignment7_Part2.java)

See the grading rubric for details

• Suggested UML

• Sample output

======== Account.java ================

public class Account
{
private int id;
private double balance;
private Date dateCreated;
private static double annualInterestRate;
private double initialBalance;

public Account ()
{
id = 0;
balance = 0;
initialBalance = 0;
dateCreated = new Date();
annualInterestRate = 0.0;
}

public Account (int id, double balance)
{
this.id = id;
this.balance = balance;
initialBalance = balance;
dateCreated = new Date();
annualInterestRate = 0.0;
}

// id
public void setId(int id)
{
this.id = id;
}

public int getId()
{
return id;
}

// bal
public void setBalance(double balance)
{
this.balance = balance;
}

public double getBalance()
{
return balance;
}

public double getInitialBalance()
{
return initialBalance;
}

// annual
public static double getAnnualInterestRate()
{
return annualInterestRate;
}

public static void setAnnualInterestRate(double annualInterest)
{
Account.annualInterestRate = annualInterest;
}

// date
public Date getDateCreated()
{
return dateCreated;
}

public double getMonthlyInterest()
{
return this.balance * annualInterestRate / 1200;
}

// w,d
public void withdraw(double amount)
{
if (amount <= balance) {
balance -= amount;
}
}

public void deposit(double amount)
{
if (amount > 0) {
balance += amount;
}
}
}

Account **Make the dataCreated variable as protected in Account class protected: dateCreate ComparableAccount Java lang Cloneable + ComparableAccount(id: int, balance: double) + toString0: String @Override + compareTo0: int @Override + clone0: Object @Override Java.lang Comparable Clone Array from elements Account ID: 1001 Balance 1400.00 Date Created Wed Nov 18 12:15:20 PST 2015 Account ID: 1002 Balance: 1300.00 Date Created: Wed Nov 18 12:15:20 PST 2015 Account ID: 1003 Balance 1200.00 Date Created Wed Nov 18 12:15:20 PST 2015 Account ID: 1004 Balance 1100.00 Date Created Wed Nov 18 12:15:20 PST 2015 Account ID: 1005 Balance : 1000.00 Date Created: ฝึed Nov 18 12:15:20 PST 2015 CloneArray.dateCeated--OrignalArray.dateCreates [0] isfalse CloneArray.dateCeated-OrignalArray.datecreates [1] is: false CloneArray.dateCeated--OrignalArray.dateCreates [2] is false CloneArray.dateCeated--OrignalArray.dateCreates [3] is false CloneArray.dateCeated-OrignalArray.dateCreates [4] is false CloneArray.dateCeated.compareTo (OrignalArray.dateCreates [O]) is:0 CloneArray.dateCeated.compareTo (OrignalArray.dateCreates [1]) is:0 CloneArray.dateCeated . compareTo (Orignal Array . dateCreates [2]) is : Ο CloneArray.dateCeated.compareTo (OrignalArray.dateCreates [3]) is:0 CloneArray.dateCeated.compareTo (OrignalArray.dateCreates [4]) is: 0 Before Sorting Account ID: 1001 Balance 1400.00 Date Created Wed Nov 18 12:15:20 PST 2015 Account ID: 1002 Balance: 1300.00 Date Created: Wed Nov 18 12:15:20 PST 2015 Account ID: 1003 Balance: 1200.00 Date Created: Wed Nov 18 12:15:20 PST 2015 Account ID: 1004 Balance 1100.00 Date Created Wed Nov 18 12:15:20 PST 2015 Account ID: 1005 Balance: 1000.00 Date Created : ฝึed Nov 18 12:15:20 PST 2015 After Sorting Account ID: 1005 Balance: 1000.00 Date Created Wed Nov 18 12:15:20 PST 2015 Account ID: 1004 Balance: 1100.00 Date Created Wed Nov 18 12:15:20 PST 2015 Account ID: 1003 Balance 1200.00 Date Created Wed Nov 18 12:15:20 PST 2015 Account ID: 1002 Balance: 1300.00 Date Created: Wed Nov 18 12:15:20 PST 2015 Account ID: 1001 Balance: 1400.00 Date Created Wed Nov 18 12:15:20 PST 2015

Answer 1

Account.java:

import java.util.Date;

public class Account {
    public int id;
    public double balance;
    protected Date dateCreated;
    private static double annualInterestRate;
    private double initialBalance;

    public Account ()
    {
    id = 0;
    balance = 0;
    initialBalance = 0;
    dateCreated = new Date();
    annualInterestRate = 0.0;
    }

    public Account (int id, double balance)
    {
    this.id = id;
    this.balance = balance;
    initialBalance = balance;
    dateCreated = new Date();
    annualInterestRate = 0.0;
    }

    // id
    public void setId(int id)
    {
    this.id = id;
    }

    public int getId()
    {
    return id;
    }

    // bal
    public void setBalance(double balance)
    {
    this.balance = balance;
    }

    public double getBalance()
    {
    return balance;
    }

    public double getInitialBalance()
    {
    return initialBalance;
    }

    // annual
    public static double getAnnualInterestRate()
    {
    return annualInterestRate;
    }

    public static void setAnnualInterestRate(double annualInterest)
    {
    Account.annualInterestRate = annualInterest;
    }

    // date
    public Date getDateCreated()
    {
    return dateCreated;
    }

    public double getMonthlyInterest()
    {
    return this.balance * annualInterestRate / 1200;
    }

    // w,d
    public void withdraw(double amount)
    {
    if (amount <= balance) {
        balance -= amount;
    }
    }

    public void deposit(double amount)
    {
    if (amount > 0) {
    balance += amount;
    }
    }
}

ComparableAccount.java:

import java.util.Date;

//class ComparableAccount inherit Account class
//and implements the interface Comparable and Cloneable
public class ComparableAccount extends Account implements Comparable<ComparableAccount>,Cloneable{
  
    ComparableAccount(int id,double balance){
        //pass to super class(Account class) constructor
        super(id,balance);
    }
  
    //override the toString method to display the field details
    @Override
    public String toString(){
        return ("Account ID: "+this.id+" Balance: "+this.balance+" Date Created: "+getDateCreated());
    }
  
    //Override comapreTo method
    //This mentod will compare the balance of two object
    //returns 1 or -1 when not equal
    //returns 0 when equal
    @Override
    public int compareTo(ComparableAccount obj) {
        if(this.balance>obj.balance)
            return 1;
        else if(this.balance<obj.balance)
            return -1;
        else
             return 0;
                  
    }
  
    //This method will deep clone tha dateCreated field
    @Override
    public Object clone()throws CloneNotSupportedException{
        //clone
        ComparableAccount account=(ComparableAccount)super.clone();
        account.dateCreated=(Date) this.getDateCreated().clone();
        return account;
    }

}

Assignment7_Part2.java:

import java.util.Arrays;
import java.util.logging.Level;
import java.util.logging.Logger;

public class Assignment7_Part2 {

  
    public static void main(String[] args) {
        //create array of object
        ComparableAccount[] OriginalArray=new ComparableAccount[5];
        int id=1001;
        double k=100;
        for(int j=0;j<5;j++){
            //initialize the objects
            OriginalArray[j]=new ComparableAccount(id,1000);
            //deposit 500
            OriginalArray[j].deposit(500);
            //withdraw k amount
            OriginalArray[j].withdraw(k);
            id++;
            k+=100;
            //print object detail
            System.out.println(OriginalArray[j].toString());
        }
        //create cloneArray of element 5
        ComparableAccount[] CloneArray=new ComparableAccount[5];
        for (int j=0;j<5;j++){
          
            try {
                //for each element in CloneArray create a clone of OriginalArray
                CloneArray[j]=(ComparableAccount)OriginalArray[j].clone();
                //check whether datecreated value is same for CloneArray and OriginalArray
                //the value will be false as they refer to different object
                boolean check=(CloneArray[j].getDateCreated()==OriginalArray[j].getDateCreated());
                //returns false asthey refer to different object
                System.out.println("CloneArray.dateCreated==OriginalArray.dateCreates["+j+"] is : "+ check);
              
            } catch (CloneNotSupportedException ex) {
                Logger.getLogger(Assignment7_Part2.class.getName()).log(Level.SEVERE, null, ex);
            }
          
         
        }
        //for all the element in cloneArray compare them to OriginalArray
         for (int j=0;j<5;j++){
         
                System.out.println("CloneArray.dateCreated.compareTo(OriginalArray["+j+")] is : "+CloneArray[j].compareTo(OriginalArray[j]));
             
          
         
        }
         //print original array befor sorting
         System.out.println("Before Sorting");
         for(int j=0;j<5;j++){
             System.out.println(OriginalArray[j].toString());
         }
         //sort originalarray
         Arrays.sort(OriginalArray);
         System.out.println("After Sorting");
         //display the original Array after sorting
         for(int j=0;j<5;j++){
             System.out.println(OriginalArray[j].toString());
         }
      
      
      
    }
  
}

Output:

Account ID: 1001 Balance: 1400.0 Date Created Mon Mar 25 15: 42:45 IST 2019 Account ID: 1002 Balance: 1300.0 Date Created Mon Mar 25 15: 42:45 IST 2019 Account ID: 1003 Balance: 1200.0 Date Created Mon Mar 25 15: 42:45 IST 2019 Account ID: 1004 Balance: 1100.0 Date Created Mon Mar 25 15: 42:45 IST 2019 Account ID: 1005 Balance 1000.0 Date Created Mon Mar 25 15: 42:45 IST 2019 CloneArray.dateCreated-OriginalArray.dateCreates [01 is false CloneArray.dateCreated-OriginalArray.dateCreates I1 is false CloneArray.dateCreated-OriginalArray.dateCreates [21 is false CloneArray.dateCreated-OriginalArray.dateCreates [31 is false CloneArray.dateCreated-OriginalArray.dateCreates [41 is false CloneArray.dateCreated.compareTo (0riginalArrayl0)l is 0 CloneArray.dateCreated.compareTo (0riginalArrayl1)1 is 0 CloneArray.dateCreated.compareTo (0riginalArray[2)1 is 0 CloneArray.dateCreated.compareTo (0riginalArrayl3)1 is 0 CloneArray.dateCreated.compareTo (0riginalArrayl4)1 is 0 Before Sorting Account ID: 1001 Balance: 1400.0 Date Created Mon Mar 25 15: 42:45 IST 2019 Account ID: 1002 Balance: 1300.0 Date Created Mon Mar 25 15: 42:45 IST 2019 Account ID: 1003 Balance: 1200.0 Date Created Mon Mar 25 15: 42:45 IST 2019 Account ID: 1004 Balance: 1100.0 Date Created Mon Mar 25 15: 42:45 IST 2019 Account ID: 1005 Balance 1000.0 Date Created Mon Mar 25 15: 42:45 IST 2019 After Sorting Account ID: 1005 Balance 1000.0 Date Created Mon Mar 25 15: 42:45 IST 2019 Account ID: 1004 Balance: 1100.0 Date Created Mon Mar 25 15: 42:45 IST 2019 Account ID: 1003 Balance: 1200.0 Date Created Mon Mar 25 15: 42:45 IST 2019 Account ID: 1002 Balance: 1300.0 Date Created Mon Mar 25 15: 42:45 IST 2019 Account ID: 1001 Balance: 1400.0 Date Created Mon Mar 25 15: 42:45 IST 2019 BUILD SUCCESSFUL (total time: 0 seconds)