MOBILE & EMB

Java Anti-Patterns

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Java Persistence Experts Teaches JPA 2.0 at GIDS 2010
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The Features of Java which help people to build secure applets

Java programs do not use pointers explicitly. Objects are accessed by getting a handle to the object. Effectively, this is like getting a pointer to an object, but Java does not allow the equivalent of pointer arithmetic on object handles. Object handles cannot be modified in any way by the Java applet or application.

C and C++ programmers are used to manipulating pointers to implement strings and to implement arrays. Java has high-level support for both strings and arrays, so programmers don’t need to resort to pointer arithmetic in order to use those data structures.

Arrays are bounds-checked at run-time. Using a negative index causes a run-time exception, and using an index that is larger than the size of the array causes a run-time exception. Once an array object is created, its length never changes.

How to install Spring IDE Tool in Eclipse 3.5

SpringSource Tool Suite™ (STS) provides the best Eclipse-powered development environment for building Spring-powered enterprise applications.

STS includes tools for all of the latest enterprise Java and Spring based technologies as well as the most advanced tooling available for enterprise OSGi development. STS supports application targeting to local, virtual and cloud-based servers and provides built in support for SpringSource dm Server and tc Server. SpringSource Tool Suite is freely available for development and internal business operations use with no time limits.

Here is how to install it:

JAR, WAR & EAR

JAR – Java ARchive
It’s a file format based on the ZIP file format and similar to ZIP format this is also used for aggregating many files (many be of different types) into one aggregate file. This aggregate file will have (.jar) extension. Application development using Java uses JAR files for many useful purposes. One of the most common use is to package all the .class files, image files, and other files required by an Applet into a JAR file, so that the download of a single file will have all the components downloaded at the client machine. Otherwise, we would require those many HTTP Connections to individually download each of the components and this will of course be a very tedious and time-consuming effort. Another popular usage is to bundle all the .class files, and other required component files of a typical subsystem into a JAR file and include that JAR file into the CLASSPATH of another Java application which requires the services of that subsystem. The maintenance and deployment becomes very easier in this case.

The Myths of J2EE by Trinisoftinc.wordpress.com

1.J2EE is hard: This is one of the most popular of these myths. The question is J2EE is hard; compared to what? We quickly forget that programming is anything but easy. I started writing Java in 2002/2003. Then I have a number of friends, most of us were VB experts(or addicts depending on who is doing the evaluation). When I deflected and I started learning Java, most of my friends have this same view of J2EE today to Java then. Java is HARD. But today, these guys are .NET/C# Experts, Some have even successfully picked up Functional Languages like erlang. So the thing is, nothing is hard, or difficult. It is our capabilities to handle them that are shallow. The first time I picked up scala, I wrote this post Scala after one week. Today I know better. So J2EE is not hard. It’s the programmer’s capability to handle it that is not top notch. There are several J2EE projects flying around, the guys that built them are neither aliens, nor programmers on steroids.

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