For loops & inheritance question

Question

I am trying this exercise dealing w/inheritance. I enter at command line a random number of c's, s's and m's. for checking,savings and money market. I then parse the string and check for the character. From there I create one of the accounts. then I am supposed to make a report that displays the past 3 months activities. the first account created gets 500 deposit the from there each account after the first gets an additional 400. so it would be: 500,900,1300,etc. Here is what I have so far, but the report part is where I can't figure out exactly how to go about solving it. Thanks in advance.
public static void main( String args[] ){
     int intDeposit = 500;
     char charTest;
     Object [] objArray = new Object[args[0].length()];
     for ( int j = 0; j < 3; j ++ ){                        System.out.println( "Month " + ( j +1 ) + ":" );
         for( int i = 0; i < args[ 0 ].length(); i ++ ){
          charTest = args[ 0 ].charAt( i );
                     if (charTest == 'c' ){
              BankAccount at = new  CheckingAccount( intDeposit );
              objArray=at;
          else if( charTest == 's' ){
          BankAccount at = new SavingsAccount( intDeposit );
          objArray[i]=at;
          else if( charTest == 'm' ){
          BankAccount at = new MoneyMarket( intDeposit );
          objArray[i]=at;
          else{
          System.out.println( "invalid input" );
          }//else
          intDeposit += 400;
          System.out.println();
     }//for j
     for (int counter = 0; counter < objArray.length; counter ++ ){
          System.out.println( "Account Type: " +
                    objArray[counter].toString() );
          System.out.println( "Initial Balance: " +
                    (BankAccount) objArray[counter].getCurrentBalance() );
     System.out.println( "TotalDeposits: " + objArray[counter].getTotalDeposits() );
     System.out.println();
     }//for i
}//main
}//TestBankAccount.java\

Answer 1

The only thing I think is wrong is the following line:
System.out.println( "Initial Balance: " +                    (BankAccount) objArray[counter].getCurrentBalance() );
Should be:
System.out.println( "Initial Balance: " +                    ((BankAccount) objArray[counter]).getCurrentBalance() );