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Community

What is Java? Java is an high-level programming language created by James Gosling from Sun Microsystems on 1991, released on 1995. Nowadays, Oracle Corporation has the steermanship for Java. Its license is GNU General Public License (GPL). Is executed on more than 850 millions of devices on all over the world. Java applications are compiled to bytecode that can run on any Java Virtual Machine (...
on Jan 30, 2014
Introduction to Class Diagram In any project's planning phase, the programmer should describe the behaviour of the different objects that are required to satisfy business use cases. However objects can't emerge from nothing, so you need a template that describe the type of objects that the system will have. As a result, you will need to show a diagram with all the classes involved and their...
on Jan 22, 2014
The Java is a platform which grown up quickly, for many rations such it can write once time and run anywhere, it runs languages on JVM. There is a myth that Java cannot compile its sources on run time, but it's truth? Have a dynamic language is important to make some projects, for example, calculate taxes to different cities, so the source should be on the database and each city it puts the...
on Jan 19, 2014
My company uses a large number of software applications to support all aspects of its business. These software applications are either "bought" or "built". The portions of the company that cannot be supported by purchased software are supported by custom developed, in-house, applications. A variety of technologies are used to create and build these custom applications. The Java framework has been...
on Sep 15, 2013
Spring is an open source framework whose goals is facilitate the Java developer's life, it began with dependency injection and nowadays works on many plug-ins. Plug-ins such Spring Social, to connects social media like twitter and facebbok, Spring security beyond control inversion. The goal of this post is talk about Spring Data working with Cassandra. Spring Data does part of Spring plug-in,...
on Aug 25, 2013
    Nowadays there are too many NOSQL database, with different architecture and data structure. However with much variety they share one thing in common: Only search information from the keys. A good option is uses other service to help the NOSQL databases. In this post will how the Lucene does work together a NOSQL database, join two world in one application.     The...
on Oct 13, 2012
Release the newest version of the framework to persist objects in Apache Cassandra in easy way. Among improvement is the JPA annotations, also JPQL.   JCassandra jCassandra=persistence.createJCassandra("select * from Person"); List<Person> persons=jCassandra.getResultList(); table 1: sample using JPQL in Easy-Cassandra This version has the improvements below: Supporting...
on May 26, 2012
    Nowadays the Enterprise applications beyond persist String and number also can save file. Persist this information is very interesting, for example, a civil process there are information about the process (name of author, date, number of protocol) and the document which represents, or a twett with an image. In Apache Cassandra, you can save file, but for large file you should use...
on Feb 1, 2012
It seems that when we develop a trait (that includes both abstract and concrete methods) in Scala and compile it, the outcome includes two jave byte code files. The first includes the definition of an interface with an identical name to the one we gave our trait. The abstract methods that interface includes are the same methods defined in our trait. The other file includes the definition of a...
on Oct 16, 2010

Education

Introduction Configuration of an actor system affects the way in which the Akka actor libraries and microkernel interact with actors. The visibility of a configuration is limited to the specific actor system with which the configuration has been associated. The effective configuration for any given actor system is a merger of three sources. In Fig. 1 below the precedence of...
on Oct 30, 2013
This article has the main objective show a little example for persist information in Cassandra using java. For demonstrated the persistence with Cassandra will used the Easy-Cassandra, a framework open source for use this SGBG in an easy mode.   @ColumnFamilyValue(nome = "person")// public class Person implements Serializable {   private static final long...
on Jan 24, 2012

Databases

Release the newest version of the framework to persist objects in Apache Cassandra in easy way. Among improvement is the JPA annotations, also JPQL.   JCassandra jCassandra=persistence.createJCassandra("select * from Person"); List<Person> persons=jCassandra.getResultList(); table 1: sample using JPQL in Easy-Cassandra Easy-Cassandra 1.0.8 Easy-Cassandra 1.0...
on Apr 21, 2012
I'm at Strata Santa Clara again this year.  I'll post my raw notes.  Hope you find them helpful.
on Feb 28, 2012
A few months ago James Gosling turned up at Liquid Robotics. Liquid Robotics designs robots called Wave Gliders that collect sensor data while wandering the seas. Rowboat sized, they raft along on the surface propelled by an underwater sled which translates vertical wave action into thrust. Solar powered, they are self-sufficient and able travel thousands of miles while transmitting data....
on Sep 22, 2011
In this post I show how simple is to integrate mybatis and spring framework. The requirements are: Spring Framwork 3.0.5 + dependencies Mybatis 3.0.3 + dependencies aopalliance-1.0 mybatis-spring-1.0.0-RC3 lombok CoreJavaBeans1.0.1 + dependencies   First of all, let's define a model bean: <span class="line-number"> 1</span> <span class="comment">/*...
on Dec 23, 2010

Programming

We all know the standard Fibonacci recursive algorithm:   public BigInteger f(int n) {    if (n == 0) return BigInteger.ZERO;    if (n == 1) return BigInteger.ONE;    return f(n - 1).add(f(n - 2));  } Your challenge is to find the first 10 bytes and the last 10 bytes of f(1_000_000_000). That's right, fibonacci of one billion. Please post...
on Feb 24, 2012
Welcome to the 198th issue of The Java(tm) Specialists' Newsletter sent to you from Chania in Greece. My readers in colder climates frequently get annoyed when I tell them that "life's a beach". They imagine us having constant sun here. It's not true. We do sometimes have torrential rains and cold weather. It even snows here occasionally. In fact, the delivery...
on Feb 14, 2012

Accessibility

                 Easy-Cassandra is a framework ORM API and a high client for Apache Cassandra in java, with this is possible persist information from the Java Object in easy way. For this is only necessary add some annotations in some fields and your class. It works like an abstraction's tier in the Thrift, doing call for Cassandra. The Easy-Cassandra...
on Feb 21, 2012
My name is Haim Michael, I am the General Manager for Zindell Technologies and I am an eternal student and a lecturer. I chose to develop the abelski web site for the benefit of all people world wide. I have started to develop it in November 2007 and I continuously update its courses and add new ones. All courses on this web site are available for free personal and academic usage.  The...
on Oct 4, 2010

Mobility

When the iPhone came to market, Sun Microsystems announced that there soon will be Java for the iPhone. They got stopped by Apple's licence terms, which ban both, interpreted languages and code written in other language than C, C++, Objective C and JavaScript. Lately I read in the news that Apple change the licence terms, and found a promising statement on Apple's web site, so now...
on Sep 10, 2010