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Showing posts from October, 2013

Basic Hello World Program in Java

When we consider a Java program it can be defined as a collection of objects that communicate via invoking each other's methods. Let us now briefly look into what do class, object, methods and instance variables mean. Object -  Objects have states and behaviors. Example: A dog has states - color, name, breed as well as behaviors -wagging, barking, eating. An object is an instance of a class. Class -  A class can be defined as a template/ blue print that describes the behaviors/states that object of its type support. Methods -  A method is basically a behavior. A class can contain many methods. It is in methods where the logics are written, data is manipulated and all the actions are executed. Instance Variables -  Each object has its unique set of instance variables. An object's state is created by the values assigned to these instance variables. First Java Program: Let us look at a simple code that would print the words  Hello World . public class MyFi