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Because the Oracle Java support system is located within the database, JVM interacts with Oracle Database libraries, instead of directly interacting with the operating system.
This chapter introduces the Java language to Oracle PL/SQL developers, who are accustomed to developing server-side applications that are integrated with SQL data.
This feature also helps in reusing an already defined code.
In the example illustrated in Figure 1-1, you can create a Polymorphism is the ability for different objects to respond differently to the same message.
Encapsulation enables you to write reusable programs.
It also enables you to restrict access only to those features of an object that are declared Inheritance is an important feature of object-oriented programming languages.As with a table definition, a class provides a template for objects that share common characteristics.