New Scripts | Java | Tutorials & Tips

Every Java programmer should be aware of the problem of code pages vs. Java Unicode. This article describes some pitfalls to avoid with code page and Unicode conversions and provides example fixes for the problems. Armed with this informaion, you should be able to create applications that are more truly platform and code page independent.

Learn how JSP technology and LaTeX help online science education and research. JSP pages and custom tags can get LaTeX-formatted formulae onto the Web in a fashion that is easy for the author and doesn't require any special client-side software. Through increasingly efficient methods, you'll see how server-side Java technology can harness the power of disparate third-party tools to solve seemingly intractable problems.

Learn the pros and cons of generating native code from Java source. This article includes the basics of code compilation, including a brief overview of why many developers are employing Java native compilers for their applications.

This generic Swing architecture eases your UI development by integrating intelligent data with Swing components. You can use the iData architecture to create a central repository of data within your application. By doing so, you'll more fully separate data from presentation and produce code that's cleaner and easier to maintain. This article explains how to use the iData technique to ease complex GUI development.

This article shows you how to customize JSP tags to get even more out of JSP technology. Its detailed techniques explain how you can add more complex logic to your JSPs, take firmer control of data display, and share data among tags. All without having to teach your front-end Web developers how to write Java code.

This is a tutorial about migrating web applications (Servlets, JSP, JavaBeans) from WebSphere 3.5 to WebSphere 4.0 which is J2EE 1.2 compliant.

A step-by-step tutorial in which we will create a Session EJB which will read a given XML file. So in this tutorial you will learn two things; how to read XML files in Java and how to add this functionality in EJBs. Every step has been explained in detail.

This step by step tutorial will show you how to build a simple Session EJB. It will then deploy this EJB on JBoss Server and call it from a JSP page running on Tomcat. You will learn how to call an EJB running on a separate EJB cotainer from a JSP page running on a different WEB container. Every step has been explained in detail.

Ant, from Jakarta project at the Apache Foundation, has become a de facto standard for building Java projects. You may already be using it to create automatic builds. It's easy enough to tailor those builds to your needs by customizing the build files; but what if you want to wait until run time to set certain properties? This article shows you how to extend Ant to produce builds that are interactive at run time; users can follow prompts to change parameters each time they conduct a build without having to deal with unfamiliar build files. You can incorporate this functionality into your builds to provide a smoother and more flexible experience for your end users.

This article describes what are application events and how you can use them. Focuses on two important web application events; Application startup and shutdown, Session creation and invalidation.

An article on what are EJBs, what they provide, what are their different types and when and why to use them.

The Java 2 Platform, Micro Edition (J2ME) offers great tools for developers, porting the Java platform's network-centric and platform-agnostic worldview down to memory- and processor-limited devices. This article explains the basics of the J2ME world, showing you the building blocks of the platform and demonstrating a sample application.

One of the most important features of the Java language is support for multithreaded (also called concurrent) programming. This tutorial introduces you to the proper use of multiple threads in a Java program, using sample programs to illustrate these concepts. Before taking this course, you should have a general knowledge of Java programming; the context and level of knowledge used in this tutorial is the equivalent of an undergraduate operating systems course.

Glass box extensibility refers to the ways in which a software system may be extended when the source code is available for viewing, but not for modifying -- it lies as the happy medium between black box design (in which extensions are built without viewing the original code) and open box design (extensions are coded directly into the base code). Because the new extensions are based directly on the original code but don't alter it, the glass box design is probably the most effective, and safest, method of extending a software system. This article expands on the topic of glass box extensibility touched on last month in this column. After reading this article, you'll know when to use the glass box and will have some tips on how to implement it.

The ThreadLocal class appeared with little fanfare in version 1.2 of the Java platform. While support for thread-local variables has long been a part of many threading facilities, such as the Posix pthreads facility, the initial design of the Java Threads API lacked this useful feature. Further, the initial implementation was quite inefficient. For these reasons, ThreadLocal gets relatively little attention, but it can be very handy for simplifying the development of thread-safe concurrent programs. This article examines ThreadLocal and offers tips for exploiting its power.

This article describes everything you need to know to send emails using JSP pages. Also describes better practices for encapsulating re-usable code in JavaBeans. Online demo available.

Java 2D may be the most obvious solution for programming 2D graphs in Java programs, but it's not the only one. This article proposes an elegant alternative in the form of Java Objects for Science (JSci), an open-source package that lets you create 2D bar graphs, pie charts, and line graphs in Swing.

A core requirement of any non-trivial P2P application is secure communication between peers. While the details of the security depend on how the application will be used and on what it will protect, it's often possible to implement strong, general-purpose security using off-the-shelf technology such as SSL. This article demonstrates how to use SSL (via JSSE) in P2P security.

Java Web Start, a new technology to assist the development of client-side Java applications, is unique in that it frees you from concerning yourself with how the client is launched, either from a Web browser or from the desktop. Additionally, this technology provides an encompassing deployment scheme that enables a Web server to independently distribute and update client code. This article introduces this enterprising new technology, which is scheduled to be integrated in the final release of Java 1.4, describing its implementation from both the developer and the user perspective.

The addition of the java.util.prefs package to Java 1.4 (through JSR 10) lets you manipulate user preference data and configuration data by providing you with access to an implementation-specific registry (for example, the Windows Registry on Windows platforms). This article introduces you to the Preferences class and walks you through its use. It puts it all together with a sample program.