The first half of this tutorial introduced the basics of inheritance in Java. You learned how to use Java’s extends and super keywords to derive a child class from a parent class, invoke parent ...

For example, a Java program obtains file I/O (input/output) services by creating objects from various file-related classes in Java’s class library and calling their methods.

UML is used as a representation of the Java programming language. Using sample class and sequence diagrams, you can see how UML conveys unambiguous code-mapping information to developers.