You can access PUBLIC data members and methods of a class instance from any part of your application. To do this, you must create or obtain an instance of the class you want to access. Once you have the reference to the instance, you can access any of its PUBLIC data members and methods.

If you are using packages and package-level access modes, then the instance reference allows you to access PACKAGE-PRIVATE and PACKAGE-PROTECTED members from other classes within the same package.

For example, a Dept class may have to access instances of the Emp class because the Emp class maintains information about employees.

Note: You can create instances of other classes and access them from procedures as well as from constructors and methods.