Instance Variables

• An object stores its data in instance variables
• Field: memory box
• Instance of a class: an object of the class
• The class declaration specifies the instance variables

public class BankAccount
{
   . . .
  private double balance;
}

• Each object of a class has its own set of instance fields

• Encapsulation is the process of hiding object data and providing methods for data access
• To encapsulate data, declare instance fields as private and define public methods that access the fields

Click here to see the file of BankAccount.java