Code Puzzle – Get Behind Firewall

Hi, today I have very nice code puzzle for you. Code Puzzle is to implement two blue boxes in following diagram. That can be implemented in Java and/or C# with following requirements. The only system that can receive connections is behind green box that is a open server endpoint. The system behind red box is closed and you cannot connect to it. I have Continue ReadingCode Puzzle – Get Behind Firewall

Java 8 SE Programmer I

Hi, Today I am proud to announce that I pass Yesterday my first Java exam. It is Java 8 SE Programmer I exam 1Z0-808. I was on very good instructor lead training and I learn about 6 hours a day on that training and then about 5 hours later on the evenings entire week. My result score could be better. On some questions I Continue ReadingJava 8 SE Programmer I

Batch Processing Aspect in Java

Hi, today I made port of my Batch Processing Aspect in Java. It is quite a bit different aspect than I made previously in C#. In C# I made something that is fully asynchronous and in Java I made aspect that does sync invocations from many threads. I have in my mind uses of this aspect to web application or web api or web Continue ReadingBatch Processing Aspect in Java

Action<T> and Func<T, TResult> in Java 8

Hi, as a .NET/C# coder I found the issue that there is not Action<T> and Func<T, TResult> equivalents in Java environment. I am self-study this to prepare myself to the OCA certification and I had idea that I can use lambda expression and implement simple equivalents of C# delegates in the Java 8. Below you can find implementation with test cases. I found that Continue ReadingAction<T> and Func<T, TResult> in Java 8

Learn Java at Hacker Rank and Rank 1 in 7 Days

So, I did it :P. p ;).

Learn Java so Far so Good Java 1D Array

Hi, I am happy to announce, that my learn Java journey at the Hacker Rank is going very nice. Today I was very happy to solve the code puzzle named Java 1D Array (Part 2) and this puzzle has already 39.64% success rate. And it category Data Structure Challenges most of the code puzzles has more than 90% of success rate. So far, so Continue ReadingLearn Java so Far so Good Java 1D Array

Learn Java proof at Hacker Rank in Tag Content Extractor

Hi, some time ago I started learn Java language. I ma trying to self-study learn of the Java. And I have to say that the language is very nice and with deep knowledge of C# my progress is fast. I want to show you today here one of nice code puzzle solution named Tag Content Extractor. It take me some time. I started learn Continue ReadingLearn Java proof at Hacker Rank in Tag Content Extractor