Java

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Chapter 4: Classes and Objects []

this.balance = balance;

The value of fredsAccount, accountNo after invoking the constructor

Account fredsAccount = new Account(123, "Fred", 60);

is 12 3 as expected.

this is actually a reference to the object being constructed. All object variables are

references, so the following code fragment:

Account fredsAccount = new Account(...);

Account billsAccount = fredsAccount;

billsAccount.balance = 500;

sets the balance for both Bill and Fred.

4.9 StringBuffer

A StringBuffer object is similar to a String object but is more efficient when you are repeatedly

appending characters ...