New Scripts | Java | Tutorials & Tips

This article discusses the anatomy of a JSP page. Discusses all the directives, scripting elements, actions and JSP tags which form part of the JSP page. This article provides good foundation for studying advanced JSP topics.

Neural nets may be the future of computing. A good way to understand them is with a puzzle that neural nets can be used to solve. Suppose that you are given 500 characters of code that you know to be C, C++, Java, or Python. Now, construct a program that identifies the code's language. One solution is to construct a neural net that learns to identify these languages. This article discusses the basic features of neural nets and approaches to constructing them so you can apply them in your own coding.

This article shows you how to combine and leverage the best parts of Jiro technology and the Web-Based Enterprise Management (WBEM) initiative. Using familiar examples from the previous two articles of this column, this article introduces the WBEM client technologies for accessing and manipulating data in a CIMOM. It then shows you how to access the same data more elegantly and efficiently, by rearchitecting the Jiro management facade to act as the interface to the CIMOM. Finally, he talks about the need for greater standardization of Jiro management facades and discusses the future of management application programming under a combined Jiro and WBEM development platform.

When special tags in fields are used to distinguish between types of objects, errors are possible in which a tag mislabels the associated data -- a bug pattern known as the Impostor Type. This article examines the symptoms and causes of this bug, defines ways to prevent this error from occurring, and discusses a tempting hybrid implementation that does not use impostor types but, in the end, turns out to have many of the same weaknesses. Article includes code snipets.

This new column offers a glimpse into the new Java 1.4 release, starting with the new jSpinner component of Swing, which lets users easily select a date, number, or choice from a pick list. Article includes code snipets.

In the real world of everyday computing (and development), there are many situations where "whipping up a Java program" to perform a task is either impractical or too time consuming. This article takes you into the underground world of FESI (Free EcmaScript Interpreter), where deploying the Java language in a quick-and-dirty fashion is the norm rather than the exception. Article includes code snipets.

An article on updating records in the database using JDBC with Java Servlets. Every step from establishing a Connection to executing the UPDATE query is explained in detail. Online demo available.

An article on inserting records into the database with Java Servlets. Every step from establishing a Connection to executing the INSERT SQL query is explained in detail. Online demo available.

This article leads you into the gray zone between modeling and method, with a look at requirements gathering via use case modeling. In particular, this article focuses on the relationship between user interfaces, system interfaces, and use case descriptions.

An article on displaying records from the database with Java Servlets. Every step from establishing a Connection to iterating through ResultSet is explained in detail.

This article describes how to forward response from one Servlet to another and how to include response from the other Servlet. Discusses RequestDispatcher interface. Online demo available.

One of the most exciting features of the new Java Servlet 2.3 specification is filtering. At first sight, Servlet 2.3 filtering is deceptively similar to existing legacy filters in Apache, IIS, Netscape Web servers and others. In reality, Servlet 2.3 filtering is a completely different design architecturally -- leveraging the object-oriented nature of the Java platform to provide a new level of performance. This article introduces you to filtering in Tomcat 4 and shows you how to make productive use of filters in your projects.

An article on managing sessions. First describes what is a session? how to identify a user across multiple pages and how to manage sessions using Java Servlets. Online demo available.

This is a continuation of the three-part series on building resource management applications. It takes a look at the Web-Based Enterprise Management (WBEM) initiative. WBEM serves to standardize the description and use of managed resources in enterprise networks. Follow along as the author describes the components that comprise WBEM, and practice using the technology with a simple filesystem example.

This article examines Java Servlets in detail and discusses HttpServlet, ServletConfig and ServletContext classes and issues like Servlet preloading and initialization parameters.

Article on step by step installation of Tomcat 4.0 Server. Then moves on to introduce JSP and eventually builds a simple JSP page to test the installation.

This is a complete chapter : 'Combining Servlets, JSP, and JavaBeans' from Wrox Press book "Professional JSP 2nd Edition". It introduces Model-View-Controller (MVC) architecture and describes combining JSP, Servlets and Java Beans using it.

The problem of system security starts with discovering the identity of the user on the other end of the communications link. This article discusses three familiar approaches for identifying users, highlights their strengths and weaknesses (alone and in combinations), and provides some examples of each.

Many algorithms are expressed most concisely as tail-recursive methods. Compilers can automatically transform such methods into loops and thereby improve program performance, but this transformation is not required by the Java language specification, so not all JVMs will perform it. This means that tail-recursive methods in the Java language can result in unexpectedly large memory usage. This article demonstrates that dynamic compilation maintains the language's semantics while static compilation often doesn't. Learn why this matters and get a bit of code to help you determine whether your just-in-time (JIT) compiler can transform tail recursion on code while preserving semantics.

If you're looking for a unique programming challenge, try your hand at building a management application for a distributed, cross-platform network. This article is the first in a three-part series that looks at how Sun Microsystems's Jiro technology and the Distributed Management Task Force's Web-Based Enterprise Management Initiative (WBEM) can simplify the creation of management applications for heterogeneous environments.