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Unlocking legacy assets can present a challenge for IT organizations. This article shows how developers can create legacy-rich applications and services using the BEA WebLogic Platform 8.1 and the WRQ Verastream host integration interface.
Updated: 03/23/2005
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Using CSV Files as Databases and Interacting with Them Using Java
In this article, we’ll show the reader how to use a simple CSV (comma-separated values) file as a simplistic database setup. We will leverage the JDBC-ODBC to interact with a CSV file, reading and writing to it with SQL. Such a technique can be particularly useful for someone trying to write simple database code, but not able to because a local database instance is not pragmatic.
Updated: 03/17/2005
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Listeners in Java
This article seeks to demystify listener interfaces in Java. For example, if you have come to Java from Visual Basic, listeners can seem confusing. If you use a button in VB it comes ready-made with a click event. The programmer doesn’t have to worry about how or where mouse or keyboard events will be processed. Not so in Java. Objects are not already event-enabled.
Updated: 03/17/2005
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Password Encryption: Rationale and Java Example
One-way Hash Encryption
This scenario is a perfect candidate for "one-way hash encryption" also known as a message digest, digital signature, one-way encryption, digital fingerprint, or cryptographic hash. It is referred to as "one-way" because although you can calculate a message digest, given some data, you can't figure out what data produced a given message digest.
This is also a collision-free mechanism that guarantees that no two different values will produce the same digest. Another property of this digest is that it is a condensed representation of a message or a data file and as such it has a fixed length.
Updated: 03/17/2005
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Java : Objects and Information Hiding
Always use the accessor and setter methods when developing classes, especially when the values contained within the data members are crucial to the functionality of your application! For more information on Java objects and information hiding, please follow the links below.
Updated: 03/17/2005
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Java : Primitive Types
There are a variety of primitive types defined in the Java language. They are common to the C/C++ language, and are described below. There are a number of complexities and intricacies associated with these types, but for now the basics will suffice.
The boolean Type
In Java and other languages, the Boolean type represents a truth value with two possible states: On or off, true or false. Booleans are used in conditional statements such as if and else, while and the test condition in for loops.
Updated: 03/17/2005
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Although BEA WebLogic Workshop 8.1 supports callback enabled Web service clients, many other platforms don't. This article shows the mechanics needed to support asynchronous Web services on these other client platforms.
Updated: 03/15/2005
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The WSRP protocol allows portals to consume remote portlets running on other portal servers. Learn how the WSRP protocol operates, and how to write portable portlets that can run locally or remotely.
Updated: 03/15/2005
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This article shows how to use CruiseControl to effectively manage WebLogic Workshop applications, thereby allowing you to incorporate Workshop applications in your continuous integration build process. A critical part of this integration is writing code that interprets Workshop's compiler output. This article also includes a download for a custom Ant task that does just this.
Updated: 02/28/2005
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This presentation discusses the challenges in heterogeneous service invocation and solution alternatives in the form of Apache WSIF, Apache Beehive and other custom frameworks.
Updated: 02/28/2005
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