Home » Author Archives: Stanislav Kobylansky

Author Archives: Stanislav Kobylansky

Building OpenJDK on Windows

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Doing some experiments, I found that it often useful to have JDK source code available in hand to make some changes, play with it, etc. So I decided to download and compile that beast. Apparently, it took me some time to do that, although my initial thought was that it’s should be as simple as running make command :). As ...

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All you need to know about QuickSort

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It would be true to say that Quicksort is one of the most popular sorting algorithms. You can find it implemented on the most of the languages and it is present in almost any core library. In Java and Go Quicksort is default sorting algorithm for some data types and it is used in in C++ STL ( Introsoft which ...

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EhCache replication: RMI vs JGroups

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Recently, I was working on one product which required replicated caching. Caching provider was already decided – EhCache, and the remained was a question about transport. Which one is the best option? By the best option here I mean just the one which has better performance. The performance measurement was done just between two of available transports – JGroups and ...

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What is behind System.nanoTime()?

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In java world there is a very good perception about System.nanoTime(). There is always some guys who says that it is fast, reliable and, whenever possible, should be used for timings instead of System.currentTimemillis(). In overall he is absolutely lying, it is not bad at all, but there are some drawback which developer should be aware about. Also, although they ...

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Public key infrastructure

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Some time ago I was asked to create presentation for my colleagues which describes Public Key Infrastructure, its components, functions, how it generally works, etc. To create that presentation, I’ve collected some material on that topic and it would be just dissipation to throw it out. That presentation wasn’t technical at all, and that post is not going to be ...

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Hints for writing secure code

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Security and data protection are becoming now more and more popular topics. We are coming into the world where too much information is transfered/used/processed by computer systems and any leak of that information can cause a big trouble. Thus, it is very important for application to protect customer information as much as it can and do not allow it to ...

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