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Prog4.java

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import java.util.Scanner;

class DemonetizationException extends Exception {

private int amount;

public DemonetizationException(int amount) {

this.amount = amount;

}

public String getMessage() {

return "Deposit of Old currency of Rs" + amount + " crosses Rs. 5,000 and cannot be Deposited";

}

}

class Account {

private static final int MIN_BALANCE = 500;

private int balance;

public Account() {

balance = MIN_BALANCE;

}

public void deposit(int amount, String currencyType) {

String curr = currencyType.toUpperCase();

if (curr.equals("OLD") && amount > 5000) {

try {

throw new DemonetizationException(amount);

} catch (DemonetizationException e) {

System.out.println(e.getMessage());

return;

}

}

balance += amount;

System.out.println("Deposit successful!");

}

public void currBalance() {

System.out.println("Current balance: Rs" + balance);

}

public void withdraw(int amount) {

if (balance - amount < MIN_BALANCE) {

System.out.println("Insufficient balance!");

return;

}

balance -= amount;

System.out.println("Withdrawal successful!");

}

}

class Prog4 {

public static void main(String[] args) {

Scanner inp=new Scanner(System.in);

Account acc= new Account();

while(true)

{

System.out.println("1.Deposit\n2.Current bal\n3.Withdraw\n4.Exit\nEnter your choice:");

int ch=inp.nextInt();

switch(ch)

{

case 1: System.out.println("Enter the amount to be deposited");

int amount=inp.nextInt();

System.out.println("Enter amount type");

String type=inp.next();

acc.deposit(amount,type);

break;

case 2: acc.currBalance();

break;

case 3: System.out.println("Enter amount to be withdrawn: ");

int amount1 = inp.nextInt();

acc.withdraw(amount1);

break;

case 4: System.exit(0);

}

}

}

}