4. Bank Statements (Account, LessBalanceException)

/*Write a JAVA program which has i. A Class called Account that creates account with 500Rs minimum balance, a deposit()    method to deposit amount, a withdraw() method to withdraw amount and also throws    LessBalanceException if an account holder tries to withdraw money which makes the    balance becomes less than 500Rs. ii. A Class called LessBalanceException which returns the statement that says withdraws    amount (Rs) is not valid. iii. A Class which creates 2 accounts, both account deposit money and one account    tries to withdraw more money which generates a LessBalanceException take    appropriate action for the same.*/

import java.io.*;
import java.lang.*;
class LessBalanceException extends Exception
{
LessBalanceException(double amt)
{
System.out.println("Withdrawing "+amt+" is invlaid");
}
}
class Account
{
static int count=0;
int accno;
double bal;
String name;
Account(double bal,String n,int accno)
{
System.out.println("\nNew Account opened....!!");
this.bal=bal;
count++;
System.out.println("Account Holder Name : " + n);
name=n;
System.out.println("Your Account Number is : "+accno);
this.accno=accno;
System.out.println("Total number of accounts : "+count);

}
void deposit(double amt)
{
System.out.println("Availabe Balance : "+bal);
bal=bal+amt;
System.out.println("Rs. : "+amt+" /- Created");
System.out.println("Balance : "+bal);
}
void withdraw(double amt) throws LessBalanceException
{
System.out.println("\nAvailabe Balance : "+bal);
bal-=amt;
if(bal<500)
{
bal+=amt;
throw new LessBalanceException(amt);
}
System.out.println("Rs. : "+amt+ "/-Debited");
System.out.println("Balacne : "+bal);
}
void balance()
{
System.out.println("\n***************Customer information****************");
System.out.println("============================================");
System.out.println("Customer Name : "+name);
System.out.println("Account Number : "+accno);
System.out.println("Balance : "+bal);
}
}
class AccountDemo
{
static int i=0;
public static void main(String argv[]) throws IOException
{
Account ob[]=new Account[10];
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
double amt;
String name;
int ch,accno,k;
boolean t=false;
while(true)
{
System.out.println("\n******* Bank Transaction *********");
System.out.println("1.Open new Account\n2.Deposit");
System.out.println("3.Withdraw\n4.Balance\n5.Exit");
System.out.print("Enter your choice : ");
ch=Integer.parseInt(br.readLine());
switch(ch)
{
case 1:
System.out.println("Opening New Account : ");
System.out.print("Enter your name : ");
name=br.readLine();
System.out.print("\nEnter Account Number : ");
accno=Integer.parseInt(br.readLine());
System.out.print("\nEnter initial amount(to be >=500) : ");
amt=Double.parseDouble(br.readLine());
if(amt<500)
System.out.println("You cannot create an account with less than Rs.500/-");
else
{
ob[i]=new Account(amt,name,accno);
i++;
}
break;

case 2:
System.out.print("\nEnter Account number : ");
accno=Integer.parseInt(br.readLine());
for(k=0;k<i;k++)
if(accno==ob[k].accno)
{
t=true;
break;
}

if(t)
{
System.out.print("\nEnter the Amount for Deposit : ");
amt=Double.parseDouble(br.readLine());
ob[k].deposit(amt);
}
else
System.out.println("Invalid Account Number...!!!");
t=false;
break;

case 3:
System.out.print("\nEnter Account number : ");
accno=Integer.parseInt(br.readLine());
for(k=0;k<i;k++)
if(accno==ob[k].accno)
{
t=true;
break;
}

if(t)
{
System.out.print("\nEnter the Amount for Withdraw : ");
amt=Double.parseDouble(br.readLine());
try
{
ob[k].withdraw(amt);
}
catch(LessBalanceException e)
{}
}
else
System.out.println("Invalid Account Number...!!!");
t=false;
break;

case 4:
System.out.print("\nEnter Account number : ");
accno=Integer.parseInt(br.readLine());
for(k=0;k<i;k++)
if(accno==ob[k].accno)
{
t=true;
break;
}

if(t)
{
//System.out.println(accno +" asdfsdf " +ob[k].accno);
ob[k].balance();
}
else
System.out.println("Invalid Account Number...!!!");
t=false;
break;

case 5:
System.exit(1);
default: System.out.println("Invalid Choice !!!");
}
}
}
}