Java In Depth

There is a very common interview question or you can say common requirement in our daily coding life we come across. "Write a Java prog...

Enums are always been the contract between the API (service) and its client(s). But if at all it is required to enhance the enum (add a new...

I came across this below code in my code base where we just want to toggle the enum value. If it is DEBIT return CREDIT, if CREDIT return DE...

Define your method is such way that, any IDE or Static Code Analyzer can sense the billion-dollar mistake , aka NullPointerException while...

You are in surprise that why this post is here under "secretsinjava.blogspot.com"? What is the secret here? But believe me, the s...