toString()

All objects automatically have a toString() method that returns a reference to a string for the object. The compiler puts in a toString() method even if you did not write it. This mechanism is called inheritance and is the subject of a upcoming chapter. The following statement could be put in main():

System.out.println( account1.toString() );

This is what it prints:

CheckingAccount@15db9742

Not very informative.

It would be useful if the toString() method made a string that showed the current state of the object.

Fill in the blanks below to complete the method.

Note: the reserved word public must be there. The chapter on inheritance will explain this further.

class CheckingAccount
{
  // instance variables
  String accountNumber;
  String accountHolder;
  int    balance;

  //constructors
  . . . .

  // methods
  . . . .

  public String toString()
  {
     return "Account: " +  + ";\tOwner: " + ";\tBalance: " +  ;
  }
}

Answer:

toString()

QUESTION 18: