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HOME TOP SCRIPTS NEW SCRIPTS ADVERTISE INFO BLOG 26 July, 2014 
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Tips and Tutorials

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Tips and Tutorials

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Difference between HashMap and HashTable


Both provide key-value access to data. The Hashtable is one of the original collection classes in Java. HashMap is part of the new Collections Framework, added with Java 2, v1.2. The key difference between the two is that access to the Hashtable is synchronized on the table while access to the HashM
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Building Your Own JSP Components


Adapted from a chapter of the book Web Development with JavaServer Pages, this article is written for developers who want to create their own Beans for use as JSP components, and for interested web designers who want to understand how these components are implemented behind the scenes. It is not nec
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.NET and J2EE - A Comparsion Study


This tutorial compares .NET and J2EE, discussing various features of both the technolgoies and summarising when and where these technologies are suitable to use for entriprise application.
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CX310-090 SCBCD EJB Java


Pass SCBCD CX310-090 exam in first attempt. 280 questions with detailed explanation and 100 study notes. CX310-090 - SCBCD EJB Java study notes, articles and mock test. 99% pass rate, 100% money back guarantee. Based on latest SUN certification exam pattern. Download exam simulation and study guide.
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What is the difference between JDK and JRE


The "JDK" is the Java Development Kit. i.e., the JDK is bundle of software that you can use to develop Java based software. The "JRE" is the Java Runtime Environment. i.e., the JRE is an implementation of the Java Virtual Machine which actually executes Java programs.
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Servlets and JSP


Servlets are Java technology's answer to CGI programming; JSP is a technology that lets users mix regular, static HTML with dynamically-generated HTML. This tutorial discusses the basics of Java Servlets and JSP, as well as the advantages of using each of these technologies.
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XML generation with JAVA


XML developers used to rely on XML parsers to read XML files. They also used to rely on XML processors to transform XML to *ML (HTML, XML, etc.). However, most of them forget these tools to generate XML from scratch. They should not. This article presents code samples for generating XML with JAVA/JA
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Java 2 Platform and JAAS Authorization Architectures


Follow along as Java architect Abhijit Belapurkar leads this detailed, behind-the-scenes introduction to two distinctly different (yet related) models of authorization: the code-centric model of the Java 2 platform security architecture and the user-centric model of the Java Authentication and Autho
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Faster apps on a better machine


If you want to build and run faster Java applications on the IBM Developer Kit for Linux, version 1.3, roll up your sleeves and prepare to get dirty. This article provides hands-on instruction for profiling, monitoring, and performance tuning not only your IBM Developer Kit, but your hardware capaci
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Unclogging Server Bottlenecks w/ Active Containers


In server-side control architectures a majority of the control events must be handled on the server side to update the state of the control. For every user event, the entire page data is sent back to the server as part of the form submission, even data that has not changed or is not affected by the
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Creating JDBC SQL Statements. Displaying Records from a MySQL Database.


A tutorial on how to create and execute JDBC SQL Statements and display records from a table in a MySQL Database. Also covers topics like creating databases and tables in MySQL. All code is explained in detail.
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JMS 1.1 simplifies messaging with unified domains


JMS 1.1 unifies point-to-point and publish/subscribe domains, allowing developers to create more general, reusable messaging code. 1.0.2 API provides little support for an application using both domains together, and no support for developing reusable frameworks that can work equally well with desti
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Java full screen image viewer


This article contains a source code of a simple Java program which draws image(from file or http:// URL) at the center of full-screen window. It uses AWT Toolkit to load image (from the file or http URL) and Swing JFrame to display it.
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Servlet Basics


Servlets are Java programs running on a web server that produce results viewed remotely on a web server. Servlets has the same purpose that CGI or PHP had in the past. We shall describe how Servlets works with some examples. You will also learn about Servlet Request and Response Model, Servlet Life
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Whizlabs SCBCD (Sun Certified Business Component Developer) Exam Simulator


Ensure your success in SCBCD exam with Whizlabs Simulator, the most effective training software for the Sun Certified Business Component Developer exam. Developed by highly experienced and certified professionals, it offers 5 mock exams (350 questions) on the latest pattern in a simulated environmen
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JSP Implicit and Session Objects


In this JPS tutorial, you will learn how to program using JSP, JSP expressions and Implicit Objects, JSP Session Object, methods of session object, getAttribute(String name), getAttributeNames and isNew().
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Accessing EJBs through firewalls


Ever try to write a J2EE application accessing EJBs across a firewall? It can be messy, and developers often must resort to all kinds of workarounds, none of them particularly "neat." Developers often write a servlet to intercept HTTP requests and delegate them to EJBs, which is kind of a
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WAP builds Java applications


If your company already relies on multitiered enterprise Java applications, then you may be closer to a wireless future than you think. By outlining a sample application, this article shows you how to connect your existing enterprise Java infrastructure to a wireless network with minimal investment
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Download SCEA 310-051 Free Exam Simulator


SCEA Practice 310-051 Free Exam Simulator which helps you to prepare for the exam. The Exam Simulator is a computer program designed to help you pass your examination on the first try. The Exam Simulator pinpoints your strengths and weaknesses by quizzing you with questions similar to those found o
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Paging Records in JSP


You can divide database results into pages with this script. This source code is for available to use with MySQL. But you can modify the code to use with PostgreSql and Oracle. You can not use this code with MS-SQL. Becuase MS-SQL does not support using 'LIMIT' in your sql queries.
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The On Demand Operating Environment


The On Demand Operating Environment is based upon the concepts of Service Oriented Architecture (SOA). SOA views every application or resource as a service implementing a specific, identifiable set of (business) functions. In addition to the business functions, services in an on demand environment m
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Long-term persistence: Serialize JavaBean component state to XML


The ability to save the JavaBean component state for long-term persistence within an XML document has been a topic of much discussion with Java developers in the past few years. This feature has finally been adopted in the 1.4 version of J2SE. This article shows you how to use the new XMLEncoder and
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Handling Cookies


This tutorial discusses the creation and use of cookies in Servlets. Includes an example of a customized search engine interface.
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Introducing the Reflexive User Interface Builder


The IBM Reflexive User Interface Builder (RIB), a new technology available from alphaWorks, is an application and toolkit for building and rendering Java AWT/Swing and Eclipse SWT GUIs. RIB specifies a flexible and easy-to-use XML markup language for describing Java GUIs and provides an engine for c
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Java 101 - An introduction to Java


This free tutorial series teaches the basics of Java programming. It requires no previous Java experience, and is perfect for the beginner. Tutorials cover a wide range of topics, from applets and applications, to more advanced issues such as class design, event handling and networking.
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JSP Action tags


In this section let us see about Action tag which is another type of tag, forward action tag and useBean action tag used in Java Server pages with syntax, usage, example and explanation in detail.
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Adding JRuby to your Java Toolbox


JRuby combines the object-oriented strength of Smalltalk, the expressiveness of Perl, and the flexibility of the Java class libraries into a single, efficient rapid development framework for the Java platform. In this third installment in the alt.lang.jre series, Michael Squillace and Barry Feigenba
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What's new in JDBC 3.0


The Java Database Connectivity (JDBC) API has emerged as a key part of the Java 2 Standard Edition (J2SE) and Java 2 Enterprise Edition (J2EE) platforms. It is the primary standards-based mechanism for the Java language to programmatically access relational databases, so when a new version of the sp
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Derby (Java DB) JDBC Driver


This article provides tutorial notes on the JDBC driver for Java DB (Derby) produced by Apache. Topics include loading JDBC driver classes; connecting Derby Network Server; getting JDBC driver information; creating tables and running queries through the Derby JDBC driver.
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Using Java Server Pages (JSP)


This is a short introductory article on JavaServer Pages. It talks about the features of JSP, a simple example, and includes some useful JSP related-links.
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JSP Environment Setup


In this JSP tutorial, you will learn the steps for setting JSP environment in Microsoft Windows, setting the PATH and CLASSPATH, steps for downloading and installing the Tomcat web server.
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Extending Ant to support interactive builds


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
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Performance Tuning of Java Applications


Ever since the first version of Java Technology hit the streets, performance has been an important issue for Java developers. Java has improved dramatically and continually but, performance tuning is very essential to get the best results, especially when we think of J2EE applications.
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Console Based Java Calculator


This is a small Console Based Java Calculator that can add, subtract , divide and multiply two numbers. Find the square root of a number, cube of a number, nth Power of a number. It is very for the begnners of Java....
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Double-checked locking and the Singleton pattern


Examine the roots of the double-checked locking idiom, why it was developed, and why it doesn't work. The Java programming language contains several useful programming idioms. It also contains some that further study has shown should not be used. Double-checked locking is one such idiom that should
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HTTP tunneling with servlets


The corporate firewall is a double-edged sword. It helps prevent unauthorized access to the corporate Web services, but can disable access for legitimate clients. Due to the number of safety measures taken by system administrators, HTTP has become the universal entry mechanism to the corporate netwo
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JSP Introduction


In this JSP tutorial, you will learn about JSP, usage of JSP, process of development, independency of layers and simplification of process.
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JSP Directives


In this JSP tutorial, you will learn about Directive tag with example, page directive, language, extends, import, session and buffer.
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Java Q & A


Here are a selection of common questions and answers about Java programming. Question categories are grouped by Applets, AWT / Graphics, I/O & Files, Language questions, Data type issues, Keywords, Operators, Networking, Java.util package and more.
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Counting Records in MySQL by JSP


This code source displays count of records in MySQL. We are using a SQL statement. You can easily modify the code to use in different languages. But this code can be used for JSP with MySQL. We will use Connector/J driver to connect database.
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