When this question was asked in an interview, like everyone I answered “Java 8 has introduced this new class Optional in java.util package. By using Optional, we are avoiding null checks and can specify alternate values to return, thus making our code more readable.” But then the interviewer wrote the…

This Story Was Originally Published on my Blog@linqz.io here. It has been almost 2 years now that I coded in Java(I am a Scala dev now) and recent introduction on Java 17 by Oracle, I thought to familiarize my self with software principles (like SOLID, KISS, YAGNI etc.) by solving…

A couple of years back i was searching for an completely free & opensource cdn service but i couldn’t find any at that point of time & I ended up using Netlify (Another alternative was Hostry). But then this idea struck “what if there was a cdn service which could…

Many programming languages support arrays with named indexes for e.g C++ , PHP , Python etc. Java has a round about implementation using Map data structure but its not an associative array. What is Associative Arrays ? Arrays with named indexes are called associative arrays (or hashes). Associative Array in JavaScript JavaScript does not support…

Most of the Java developers have an unfounded fear of Generics(or I call it fear of Unknown :D) due to lack of understanding. And if by chance, they overcome that fear, they start fearing the upper and lower bound. …

String concatenation was a costly affair in the early Sun Java versions(till JDK1.4 to be precise). Even though later JDK’s brought the compiler optimization of String concatenation using StringBuilder, still String class(not just concatenation) is the most discussed topic during interviews or otherwise among Java developers. The StringBuilder class was…

This story was published originally on my blog@linqz.io here. OECD (The Organisation for Economic Co-operation and Development) regularly publishes country data for various financial institutions to understand the financial growth of a nation. …

This blog was originally published on my Blog@linqz.io here. Well, after reading the title, first thought which comes to mind is “Is there a guideline for Getter/Setter in java?” . The answer is “No, there isn’t, this blog entry is my mistakes done during my last 10 years of coding…

This blog was originally published on my Blog@linqz.io here. Hikari Connection Pooling (or Hikari CP) is the new kid on the block, though a late entrant in pooling mechanisms, it is outperforming the ones offered by C3P0, Apache Commons DBCP, BoneCP, Tomcat, Vibur etc. Below benchmark graph displays connection and…