class CheckingAccount
{
  // instance variables
  String accountNumber;
  String accountHolder;
  int    balance;
  //constructors
  . . . .
  // methods
  . . . .
  void processDeposit ( int amount )
  {
    balance = balance + amount ;
  }
}
If you have the previous test program in a file, 
it would be nice to add the processDeposit() method
and test it.
The method to process a check is slightly more complicated:
void.Here is a sketch of the method:
Fill in the blanks to complete the method.