QUESTION 21:
- How many CheckingAccount objects are there?
- How many object reference variables are there?
- What will the program print out?
Say that James wrote out a $300 check to Bob, and that Bob deposited the check in Bob's account.
public static void main( String[] args )
{
. . . . . .
int check = 30000;
account2.processCheck( check );
account1.processDeposit( check );
account1.display();
account2.display();
}
This is not really part of testing this class, but it is convenient to mention aliasing again. Recall that there can be more than one reference to a given object. Each reference is called an alias. Here is another test program, set up to show this:
class CheckingAccount
{
. . . .
}
class CheckingAccountTester
{
public static void main( String[] args )
{
CheckingAccount account1 = new CheckingAccount( "123", "Bob", 100 );
CheckingAccount account2 = new CheckingAccount( "456", "Jill", 900 );
CheckingAccount account3;
account1.display() ;
account2.display() ;
account3 = account1;
account3.display() ;
}
}