Download Developing J2EE Applications with WebSphere Studio: IBM by Howard Kushner PDF

By Howard Kushner

Built in cooperation with the crew that created the examination, this e-book is the one certification learn advisor counseled and instructed via IBM for try 287. it really is designed to organize Java programmers to meet the function of an IBM qualified firm developer, aiding the jCert company developer task position, which represents the top point of internet and company improvement. the latest model of J2EE (Version 1.3) is tested and the wealthy gains and performance incorporated within the WebSphere platform are offered. Programmers are guided throughout the myriad perspectives and views in addition to the J2EE roles allowing them to construct, attempt, gather, and install company functions the WebSphere means.

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Extra resources for Developing J2EE Applications with WebSphere Studio: IBM Certified Enterprise Developer (IBM Certification Study Guides) (IBM Certification Study Guides)

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Subsequent chapters will go into more detail appropriate to the enterprise developer. The third goal of this chapter was to introduce you to the unit-testing facilities and options available in Application Developer: the WebSphere Test Environment, the UTC, the Remote Server environment, the Agent Controller, the Application Client runtime environment, and the standard JVM test environment. Chapter 2: Developing enterprise applications with WebSphere Studio 47 48 Chapter 3: Servlets Test yourself Key terms perspective view IDE workbench workspace ear war deployment descriptor modules project Review questions 1.

An HTML form may include a text area, which contains multiple lines of text. The syntax for a text area is the following. getParameter("ADDRESS") for the text area returns all text entered. In this example the text area is four rows tall and 40 columns wide. An HTML form may contain two types of list: drop-down lists and traditional scrolling lists. In HTML syntax a list is known as a select, as in the following example. 54 Chapter 3: Servlets Chapter 3: Servlets 55 The size of the select determines the type of list displayed in the Web browser.

Instead, since the servlet is still in memory, the application server simply calls the service method again. In fact, if multiple concurrent requests are sent, the application server calls the service method once for each request, possibly simultaneously. This leads to an interesting problem: What happens when multiple requests need to be serviced simultaneously? Technically, the application server uses multi-threading to handle the requests, with each request in its own thread. Threads are much less resource intensive than processes.

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