Java Tip 135: Layer and compare property files

Are you still using one big property file? Using multiple property files instead can also be unwieldy, unless you have the right tools. You can layer property files easily when you use the PropDiff utility. Layered property files are...


Java Tip 134: When catching exceptions, don't cast your net too wide

In contrast to some other languages, Java's simplicity and consistency allow compilers to detect many more errors. Java developers learn to rely on their compilers to catch assignments to incorrect types, calls of nonexistent methods...


Java Tip 133: More on typesafe enums

Published in early 1997, " Java Tip 27: Typesafe Constants in C++ and Java" discussed how to create and use typesafe constants (enums) in both Java and C++. Since then, various JavaWorld articles have covered how to enhance this...


Java Tip 132: The taming of the thread

With MutableThread and ThreadWatchDog, you can make your threads come back to life and continue running seamlessly even after thread death.


Java Tip 131: Make a statement with javac!

To learn part of a new API or even some important Java nuance, you'll often find it useful to run a short bit of code. In this Java Tip, Shawn Silverman explains how to easily and quickly test one or more Java statements. The program...


Java Tip 130: Do you know your data size?

Over the years many Java developers have asked, "How much memory does a Java object consume?" In this Java Tip, Vladimir Roubtsov explains problems with previous solutions. In addition, based on his experience exploring memory usage,...


Java Tip 129: SGLayout—a layout manager for the rest of us

Complex graphical user interfaces (GUIs) can be difficult to set up using standard Java layout managers like BorderLayout, GridLayout, or FlowLayout. While GridBagLayout proves a much more powerful standard Java layout manager, it...


Java Tip 128: Create a quick-and-dirty XML parser

This tip shows you how to parse XML when running in an applet or other space-restricted environment, such as a J2ME (Java 2 Platform, Micro Edition) application. The process limits functionality in a way that many small applications...


Java Tip 127: See JAR run

This tip shows how to turn an unrunnable Java Archive (JAR) into a runnable one, without having to directly manipulate manifest files. You learn to develop a short program that enables any JAR to run with the java -jar command or on...


Java Tip 126: Prepare cross-server database access methods with JDBC

Server-side Web applications often need to access backend databases. A set of well-designed and efficiently implemented database access methods can greatly reduce the maintenance overhead and improve your Web applications'...


Java Tip 125: Set your timer for dynamic properties

Property files let you reconfigure your Java application without recompiling. Typically, however, you need to restart your application to load the new properties. This tip shows you how to load new property files without restarting...


Java Tip 124: Trace your steps in Java 1.4

Ever get the feeling you might be lost? Java can help you find your way back, at least in your programs. In the past, Java lacked the simple ability to map runtime code back to its position in the source code file. The pre-Java 1.4...


Java Tip 123: Dial into the wireless world

This tip uses a phone book example to show how to build, configure, and run a simple wireless application. The example demonstrates connectivity between a WML (Wireless Markup Language) client device and the Tomcat Web server through...


Java Tip 122: Beware of Java typesafe enumerations

The so-called typesafe enum construct has gained popularity since its increased coverage in several publications and admittance into the Sun JDK implementation. But be warned: this tip shows that the construct isn't as safe as you...


Java Tip 120: Execute self-extracting JARs

This tip presents an easy way to make self-extracting Java Archives (JARs). A self-extracting archive can extract the contained files to user-selected directories on any Java platform. Your users are only required to have a Java...


Java Tip 119: Don't know much about file history?

Many file processing applications have a history mechanism that tracks the last processed files. Typically these filenames are appended to the bottom of a File menu in the order you have processed them. This tip provides a class that...


Java Tip 118: Utilize the EjbProxy

This tip introduces you to the EjbProxy utility class. It instantiates and invokes a remote EJB without coupling your code directly to a specific implementation of that particular EJB.


Java Tip 117: Transfer binary data in an XML document

XML has gained popularity as a platform- and language-independent format for transferring data across systems. In situations where you need to transfer binary data within an XML document, you must encode that binary data into an...


Java Tip 116: Set your table options -- at runtime!

The JTable class offers rich functionality for grid-like data display. This Java tip addresses common display issues related to dynamically changing such things as scroll bars, column width, and row height.


Java Tip 115: Secure JavaMail with JSSE

JavaMail storage providers lack direct SSL connection support, but luckily, the JSSE API provides support for SSL or TLS network connections. This tip combines the functionality of a JavaMail framework with an SSL socket factory from...


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