Parameters are Seen by their Own Method, Only

The formal parameters of a method can be "seen" only by the statements of their own method. This means that if a method tries to use a parameter of some other method, the compiler will find a syntax error.

Here is the CheckingAccount class again, this time with a new definition of the toString() method

class CheckingAccount
{
  . . . .
  private int balance;

  . . . .
  public void processDeposit( int amount )
  {
    System.out.println( balance + "/t" + amount );
  }

  // modified toString() method
  public String toString()
  {
    return  "Account: " + accountNumber + "/tName: " + accountHolder + 
            "/tBalance: " +  amount  + "/tUse Count: " + useCount;
  }

}