Classes and Objects in Java_Object-oriented programming

Outline: Classes, Working with objects, Attributes, methods, and access control, Constructors. Readings: Java how to program, chapter 3, 8. A Java program is a collection of objects. Each class is specified in one source file (file name is the same with class name), Every line of code you write in Java must be inside a class (not counting import directives), Increase modularity, Easier to modified code, shorter compile time.