Java HelloWorld vs Scala HelloWorld


As a first step into learning Scala and as one who is familiar with Java, let us compare the customary Helloworld programs in Java and Scala. You might already know that to run a Java program, there must be a public class with a main method that takes one parameter, a String[ ], and has a void […]

Introduction to Java Agents


In this article we will discuss about Java Agents. Java Agents are software components that provide instrumentation capabilities to an application. In the context of agents, instrumentation provides the capability of re-defining the content of class that is loaded at run-time. We will discuss this in more detail in the further sections. Download Source Code: […]

Implementing WatchService API in Java 7 to monitor the directory changes


In Java 7 there were quite a lot of new things added to the File NIO package (java.nio)- there was a new java.nio.file package and java.nio.file.attribute package. Main highlights of the java.nio.file package are the following classes: Path: Its an object used to locate a file or directory in the file system. The value contained […]

Merge Sort implementation using Fork-Join Framework in Java 7

In our previous post we went through the basics of Fork-Join Framework introduced as part of Java 7. In this post lets apply the same Fork-Join to implement Merge sort algorithm. The pseudo code for Merge sort can be found here. also read: Java 7.0 Tutorials New Features in Java 7.0 G1 Garbage Collector in […]

A simple Location and Weather mashup using Gaelyk Framework


In our sample Gaelyk application here we stopped at just obtaining the location information. In this post lets update that application to fetch the Weather information as well. also read: Groovy Tutorials Creating JSON using Groovy Developing Groovy based web application and deploying to Google App Engine For the weather information we make use of […]

Simple introduction to Fork-Join Framework in Java 7


Fork-Join Framework was added as part of Java 7 which makes use of the ExecutorService interface to distribute tasks to the worker threads in the thread pool. The difference in Fork-Join is that the ideal worker threads can steal queued subtasks from the other tasks and execute them. also read: Java 7.0 Tutorials New Features […]

Handling/Avoiding Null’s in Java using Guava versus Scala


There was a discussion about nulls in the latest episode of JavaPosse. Having been inspired from that discussion and with an urge to check out Google Guava library, I came across a way to handle Null’s in Guava which is very similar to the way Scala handles. also read: Java Tutorials Java EE Tutorials Design […]

Developing Groovy based web application and deploying to Google App Engine


We have seen how to develop a ZK based application and deploy it to OpenShift. Google has also a Paas offering called Google App Engine(GAE) which supports Java, Python and Dart applications. Gaelyk is a simple Groovy based toolkit to develop and deploy application to GAE. In this article lets build a simple Gaelyk based […]

HelloWorld with Netbeans 7.2 beta and Scala 2.9


Here is the step by step procedure to set up the scala(2.9) environment with Netbeans(7.2) on a Windows Vista system 1. Install Netbeans 7.2 Beta if not already installed from here. 2. Download the Scala installable from here. Install Scala on your system. 3. Set the environment variable SCALA_HOME pointing it to the Scala installation directory. (On Windows […]

Using Morphia- Java library for MongoDB

In our post on developing sample Todo Application using JavaFX and MongoDB, we showed how we can use MongoDB, JavaFX to create a sample application. In that post we used the API provided by MongoDB to carry out the DB operations. In this post lets look at how we can use Morphia to carry out […]