Question

Must be in GUI interface

Design an abstract class namedBankAccountto hold the following data for a bankaccount:

* Balance
* Number of deposits this month
* Number of withdrawals (this month)
* Annual interest rate
* Monthly service charges

The class should have the following methods:

Constructor: The constructor should accept arguments for the balance and annual interest rate.

deposit: A method that accepts an argument for the amount of the deposit. The methods should add the argument to the account balance. It should also increment thevariable holding the number of deposits.

withdraw: A method that accepts an argument for the amount of the withdrawal. The method should subtract the argument from the balance. It should also incrementthe variable holding the number of withdrawals.

calcInterest: A methodthat updates the balance by calculating the monthly interest earned by the account ,and adding this interest to the balance. This isperformed according to the following formulas: Monthly InterestRate = (Annual Interest Rate / 12) Monthly Interest = Balance *Monthly Interest Rate Balance =Balance + MonthlyInterest

monthlyProcess: A method that subtracts the monthly service charge from the balance, calls the calc Interest method, and then sets the variables that hold thenumber of withdrawals, number of deposits, and monthly service charges to zero.

Next, design a SavingsAccount class that extends the BankAccount class.The SavingsAccount class should have a status field to represent an active or inactiveaccount. If the balance of a savings account falls below $25, it becomes inactive. (The status field could be a boolean variable.) No more withdrawals may be madeuntil the balance is raised above $25, at which time the account becomes active again. The savingsaccount class should have the following methods:

withdraw: A method that determines whether the account is inactive before a withdrawal is made. ) No withdrawal will be allowed if the account is not active.) Awithdrawal is then made by calling the superclassversion of the method (assuming it is allowed).

deposit: A method thatdetermines whether the account is inactive before a deposit ismade. If the account is inactive and the deposit brings the balanceabove $25,the account becomes active again. A deposit is then madeby calling the superclass version of the method.

monthlyProcess: Beforethe superclass method is called, this method checks the number of withdrawals. If the number of withdrawals for the month is more than 4, aservice charge of $1 for each withdrawal above 4 is added to the superclass field that holds the monthly service charges.(Don’t forget to check the account balanceafter the servicecharge is taken. If the balance falls below $25, the accountbecomes inactive.

Answer 1

import java.io.*;class BankWork
{
          final int max_limit=20;
          final  int min_limit=1;
          final double min_bal=500;         private  String name[]=new String[20];         privateint accNo[]=newint[20];         private  String accType[]=new String[20];         privatedouble balAmt[]=newdouble[20];         staticint totRec=0;        //constructor
        BankWork()
        {             for(int i=0;imax_limit)
               {
                    System.out.println("\n\n\nSorry we cannot admit you in our bank...\n\n\n");
                    permit=false;
               }               if(permit = true)   //Allows to create new entry
               {
               totRec++;         // Incrementing Total Record               
               System.out.println("\n\n\n=====RECORDING NEW ENTRY=====");               try{
                          accNo[totRec]=totRec;    //Created  AutoNumber  to accNo so no invalid id occurs
                        System.out.println("Account Number :  "+accNo[totRec]);
                        
                     BufferedReader obj = new BufferedReader(new InputStreamReader(System.in));
                     System.out.print("Enter Name :  ");
                     System.out.flush();
                     name[totRec]=obj.readLine();

                     System.out.print("Enter Account Type : ");
                     System.out.flush();
                     accType[totRec]=obj.readLine();                    do{
                           System.out.print("Enter Initial  Amount to be deposited : ");
                           System.out.flush();
                           str=obj.readLine();
                           balAmt[totRec]=Double.parseDouble(str);
                         }while(balAmt[totRec]totRec)   //To check whether accNo is valid or Not
                     {
                          System.out.println("\n\n\nInvalid Account Number \n\n");
                          valid=false;
                     }                    if (valid==true)
                      {     
                        System.out.println("\n\nAccount Number : "+accNo[acno]);
                        System.out.println("Name : "+name[acno]);
                        System.out.println("Account Type : "+accType[acno]);
                        System.out.println("Balance Amount : "+balAmt[acno]+"\n\n\n");
                      }
                 }            catch(Exception e)
            {}
        }          //TO DEPOSIT AN AMOUNTpublicvoid deposit()
        {
              String str;              double amt;              int acno;
              boolean valid=true;
              System.out.println("\n\n\n=====DEPOSIT AMOUNT=====");              
              try{                   //Reading deposit value
                   BufferedReader obj = new BufferedReader(new InputStreamReader(System.in));

                        System.out.print("Enter Account No : ");
                        System.out.flush();
                        str=obj.readLine();
                        acno=Integer.parseInt(str);                         if (acnototRec)   //To check whether accNo is valid or Not
                         {
                              System.out.println("\n\n\nInvalid Account Number \n\n");
                              valid=false;
                         }           
                        if (valid==true)
                       {
                            System.out.print("Enter Amount you want to Deposit  : ");
                            System.out.flush();
                            str=obj.readLine();
                            amt=Double.parseDouble(str);

                            balAmt[acno]=balAmt[acno]+amt;                            //Displaying Depsit Details
                            System.out.println("\nAfter Updation...");
                            System.out.println("Account Number :  "+acno);
                            System.out.println("Balance Amount :  "+balAmt[acno]+"\n\n\n");
                        }
                 }            catch(Exception e)
            {}
       }     //TO WITHDRAW BALANCEpublicvoid withdraw()
        {
              String str;              double amt,checkamt;              int acno;
              boolean valid=true;
              System.out.println("\n\n\n=====WITHDRAW AMOUNT=====");              
              try{                   //Reading deposit value
                   BufferedReader obj = new BufferedReader(new InputStreamReader(System.in));
                   
                        System.out.print("Enter Account No : ");
                        System.out.flush();
                        str=obj.readLine();
                        acno=Integer.parseInt(str);                          if (acnototRec)   //To check whether accNo is valid or Not
                             {
                                System.out.println("\n\n\nInvalid Account Number \n\n");
                                valid=false;
                            }                        if (valid==true)
                        {
                                System.out.println("Balance is : "+balAmt[acno]);
                                System.out.print("Enter Amount you want to withdraw  : ");
                                System.out.flush();
                                str=obj.readLine();
                                amt=Double.parseDouble(str);

                                checkamt=balAmt[acno]-amt;                                if(checkamt >= min_bal)
                                 {
                                    balAmt[acno]=checkamt;                                    //Displaying Depsit Details
                                    System.out.println("\nAfter Updation...");
                                    System.out.println("Account Number :  "+acno);
                                    System.out.println("Balance Amount :  "+balAmt[acno]+"\n\n\n");
                                }                                else
                                 {
                                    System.out.println("\n\nAs per Bank Rule you should maintain minimum balance of Rs 500\n\n\n");
                                }
                        }
                 }            catch(Exception e)
            {}
       }

};class  Bank
{    publicstaticvoid main(String args[]) 
    {
        String str;        int choice;
        choice=0;

        BankWork BW_obj = new BankWork();        

        do
        {
        System.out.println("Choose Your Choices ...");
        System.out.println("1) New Record Entry ");
        System.out.println("2) Display Record Details ");
        System.out.println("3) Deposit...");
        System.out.println("4) Withdraw...");
        System.out.println("5) Exit");
         System.out.print("Enter your choice :  ");
        System.out.flush();              try{
                   BufferedReader obj = new BufferedReader(new InputStreamReader(System.in));
                   str=obj.readLine();
                   choice=Integer.parseInt(str);                          switch(choice)
                           {                            case 1 :  //New Record Entry
                                            BW_obj.newEntry();                                           break;                            case 2 :  //Displaying Record Details
                                           BW_obj.display();                                           break;                            case 3 : //Deposit...
                                            BW_obj.deposit();                                           break;                            case 4 : //Withdraw...
                                            BW_obj.withdraw();                                            break;                            case 5  :  System.out.println("\n\n.....THANKS FOR VISITING.....");                                            break;                            default : System.out.println("\nInvalid Choice \n\n");
                          }
                    }                catch(Exception e)
                {}
            }while(choice!=5);
    }
}

Answer 2

public abstract class Account
{
private double bal;
private int accnum;
public Account(int a)
{
bal=0.0;
accnum=a;
}

public void deposit(double sum)
{
if (sum>0)
bal+=sum;
else
System.err.println("Account.deposit(...): "
+"cannot deposit negative amount.");
}
public void withdraw(double sum)
{
if (sum>0)
bal-=sum;
else
System.err.println("Account.withdraw(...): "
+"cannot withdraw negative amount.");
}
public double getBalance()
{
return bal;
}
public double getAccountNumber()
{
return accnum;
}
public String toString()
{
return "Acc " + accnum + ": " + "balance = " + bal;
}
public final void print()
{
System.out.println( toString() );
}
}
public class SavingsAccount extends Account
{
private double interest;
public SavingsAccount(int accnum, double interest)
{
super(accnum);
this.interest=interest;
}
public double getInterest()
{
double x=super.getBalance()*interest;
return x;
}

public void setInterest(double interest){
this.interest=interest;
}

public void AddInterest (double interest){
double x=super.getBalance()*interest;
super.deposit(x);
}

public String toString(){
return super.toString()+" Interest : "+interest;
}



}

public class CurrentAccount extends Account
{
private double limit;
public CurrentAccount(int accnum, double limit){
super(accnum);
this.limit=limit;
}
public double getLimit()
{
return this.limit;
}
public void setLimit(double limit)
{
this.limit=limit;
public void withdraw( double limit)
{
if(limit<=this.limit)
super.withdraw(limit);
else
{
System.out.println(" Sorry, Limit Exceeded" );
}
}
public String toString()
{
return super.toString()+" Limit : "+limit;
}
}

public class Bank
{
public static void main (String[] args)
{
Account[] acc=new Account[2];
acc[0]=new SavingsAccount(263010,0.25);
acc[1]=new CurrentAccount(253010,5000);
for(int i=0; i {
if(acc[i]equals(SavingsAccount))
System.out.println(acc[0].getInterest());
}
}