in java

Given the following code:

public class Account

{

private double balance; // instance variable that stores the balance

// constructor

public Account( double initialBalance )

{

// validate that initialBalance is greater than 0.0;

// if it is not, balance is initialized to the default value 0.0

if ( initialBalance > 0.0 )

balance = initialBalance;

} // end Account constructor

// credit (add) an amount to the account

public void credit( double amount )

{

balance = balance + amount; // add amount to balance

} // end method credit

// return the account balance

public double getBalance()

{

return balance; // gives the value of balance to the calling method

} // end method getBalance

} // end class Account

What is output by the following main method?

public static void main( String args[] )

{

Account account1 = new Account( 15.33 );

System.out.printf( "account1 balance: $%.2f ", account1.getBalance() );

System.out.println( "adding $2.53 to account1 balance" );

account1.credit( 2.53 );

System.out.printf( "account1 balance: $%.2f ", account1.getBalance() );

} // end main

what is the output ?