heartin's blog

Association vs Aggregation vs Composition

Submitted by heartin on Thu, 10/18/2012 - 11:28

In object oriented programming or in Unified Modelling, relationships between objects can be classified as association, aggregation, composition and inheritance. 

 

Association

Association is a relationship between two objects. Here objects might not be completely dependent on each other.

Writing Custom Exceptions in Java

Submitted by heartin on Mon, 09/24/2012 - 02:04

Custom Exceptions are user defined Exception classes that extend either Exception class or RuntimeException class.

Introduction to Exceptions in Java

Submitted by heartin on Mon, 09/24/2012 - 00:56

An exception is a divergence from an application’s normal behavior. Read about exception hierarchy in Java, checked and unchecked exceptions, and how to handle exceptions in Java.

Methods in Java

Submitted by heartin on Wed, 09/19/2012 - 22:14

A class represent the properties and behabiour of an object. An methods represent these behaviours.

Variables and Data Types in Java

Submitted by heartin on Wed, 09/19/2012 - 02:29

A variable is something that can hold some data. Class variables or static variables belong to class. Instance variables are non-static variables belong to objects. Local variables are local within blocks or methods and they die when we exit that block or method.

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