LEARN JAVA PROGRAMMING - HELP AND JAVA LANGUAGE, J2EE TUTORIALS

The ZIP file format has become extremely popular for the distribution and storage of files... The java.util.zip package allows for the programmatic reading and writing of the ZIP and GZIP formats. As you’ll see in this article, the API for reading and writing ZIP files is pretty straightforward to use... In this article, I’ll take you through a Java program that creates of a ZIP file and also walk you through another Java program that unzips the file we created.

Last time, we mastered some basic UI components and worked on how to add them to panels, organize their layout, and manage their events. Having covered all the basic techniques that we’ll need to get started with Java interface programming in our first article, Java's Basic User Interface Components, we will move on to some advanced UI components. Today, I’ll be covering scrolling lists, scrollbars, and canvases, and their functionality. It is amazing to see how many of complex tasks are simplified with the help of these advanced user interface components.

To simplify user interaction and make data entry easier, you can use java controls. Controls are components, such as buttons, labels and text boxes, that can be added to containers like frames, panels and applets. The Java.awt package provides an integrated set of classes to manage user interface components.

A well laid out user interface is an effective means of making applications user-friendly. It is typically used by organizations for accepting orders from customers, getting customer’s feedback on a product, for conducting a market survey on the latest trends in economy.

With the skills that you have developed so far from Part I of the tutorial, you can design a graphical user interface with beauty and easy. Let us refresh ourselves before we proceed, Events are method calls that Javas windowing system performs whenever any element of a user interface is manipulated.

In life, you encounter events that force you to suspend other activities and respond to them immediately. In Java, events represent all activity that goes on between the user and the application. Java's Abstract Windowing Toolkit (AWT) communicates these actions to the programs using events.

One of the most exciting features about JSP is the ability tobuild and use custom "tag libraries" in your JSP applications. In thisarticle, find out why tag libraries are a Good Thing, and read about how toget and install custom tag libraries for common tasks.

In this week's episode, find out how the JSP Exception objectprovides developers with a graceful way to recover from script errors. Andthen take a quick tour of the JSP directives you need to know in order tointegrate standalone JavaBeans into your JSP scripts.

Now that you've mastered the basics, it's time to bring out thebig iron. This week, The JSP Files explores the various techniquesavailable to "maintain state" on a JSP-based Web site. Learn about theCookie and Session objects, find out how to build a cookie-based hitcounter, and read about a simple yet effective way of protecting sensitiveWeb pages with the Session object.

This week, find out how to connect your JSPs to a database and build dynamic, data-driven Web pages. This primer covers different techniques to select, insert and delete records, and uses a simple Web-based address book to illustrate the Connection, Statement, and ResultSet objects.

Now that the basics are done with, it's time to begin applyingthat theory to Web development. This week, The JSP Files investigates theJSP Request object, and demonstrates how it can be used to process formdata. Learn about JSP's array variables, find out what chocolate chipcookies and couch potatoes have in common, and explore a very unusualpharmacy.

Deploying a JSP development environment on your workstation cantest even the strongest of wills, since it requires the peacefulco-existence and cooperation of a number of complex software packages. Thistutorial guides you through the process of getting Apache, JServ and Tomcatconfigured, alerts you to some of the problems you're likely to encounter,and briefly discusses Tomcat contexts and JSP-mySQL connections. Coversboth Windows and Linux.

This week, learn all about the different types of loops supportedby JSP, and also expand your knowledge of the various String objectmethods. Finally, take a quick tour of the JSP Response object inpreparation for learning how JSP handles form data.

The second part of our introductory JSP tutorial discussesarithmetic, logical and comparison operators, together with simple examplesand illustrations. You'll also learn the basics of JSP's numerousconditional expressions, including the "if", "if-else" and "switch"statements, and find out a little more about the String object.

Get to grips with Java Server Pages with this introductorytutorial and find out how to use one of the more powerful server-sidelanguages around. This first part explains the history and basics of JSPdocuments, and also illustrates variables, includes and the String object.