Sunday, November 23, 2014

String comparison in Java. == vs equals method.

Just not to make everything Object oriented, primitives has been retained in Java. To resolve performance issues and to keep it as simple as it is, primitives has been introduced in most using OOP language till date. Lets just not discuss all the primitive concepts and sticking to the heading of this articles lets discuss about our favourite and peculiar Object, STRING.

Thursday, November 20, 2014

Identifiers and limit on Identifier length in Java (maximum length of Class,interface, package, method, variable names).

Fun time.

Though it is not a big thing to consider, yet out of curiosity one can interested to know about the limit on Class names, Interface names, Package names, Variables names, Method names etc.

Before going to start with that let me introduce the term identifier . What is it? The above all names so far we mentioned (Class, Interface, Package, Method, Variable names) are identifiers. Do not confuse with the terms literal and identifier and literal. Definition given by Oracle for Identifier is

Wednesday, November 5, 2014

Why GWT loads slow and tips to load GWT app faster.

Why GWT loads very slow for first time:


GWT uses perfect caching technique. The initial loading time is really depends on many factors.

When user/browser requests for the very first time, all the resources related to the page loads. That takes few seconds to load and really depends on your internet speed. Once the complete page loaded and if you are requesting new page/ reloading the current page, all the resources won't load this time.

Tuesday, November 4, 2014

Covariant, Contravariant and Invariant (class invariant) in Java

Type variance is another feature which defines the flexibility in code writing every of programming language. Let me show you some of the variant type jargon's which explains the type variance.

When ever we are talking about type variance,

Monday, October 13, 2014

Programming with interface and programming to interface

Another good habit that every programmer adopt is programming to interfaces, rather than programming to implementations. It is clearly not about using interfaces in your application, though you are using interfaces at design level, it is very hard to make coders to get benefit out it. There is a very big difference between programming with interfaces and programming to interfaces. The main difference is that