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Classes, Superclasses, and SubclassesDefining Subclasses public class Manager extends Employee{ added methods and fields} The kewyord extends indicates that you are makingn a new class taht derives from an existing class. The existing class

Introduction to Object-Oritented ProgrammingIntroduction Each object has a specific functionality, exposed to its users, and a hidden implementation Basically, as long as an object satisfies your specifications, you don't care how the functionality is

3.1 A Simple Java Programpublic class FirstSample{ public static void main(String[] args) { System.out.println("We will not use 'Hello, World!'"); }}The keyword public is called an access modifier; these modifiers control the lev

2.1 Installing he Java Development KitJava Jargons Java Development Kit (JDK): The software for programmers who want to write Java programs Java Runtime Environment (JRE): The software for consumers who wnat to run Java programs Server (JRE): The so

1.1 Java as a Programming PlatformJava isnot only a programming language, but also a platform1.2 The Java "White Paper" BuzzwordsSimple Compared to C++ Small: 40k for the size of the basic interpreter and class support; 175k for the basic standar..