Hardcore Java by Robert Simmons

By Robert Simmons

Java has fast develop into probably the most vital languages in programming, really for pro and enterprise-level tasks. From its infancy as a language basically used for net applets to its adulthood via servlets, firm JavaBeans, and database entry, Java has develop into a fancy and strong software for brand new developer.Hardcore Java takes this language and breaks it aside, piece via piece, revealing the $64000 secrets and techniques and methods that might take you from a junior-level programmer to a pro and specialist developer. you will fly throughout the basics and speedy end up studying approximately complicated reminiscence administration strategies, optimization and bytecode-level improvements, and the recommendations required to construct lightning-fast GUIs. in the course of the e-book, you are going to additionally grasp the artwork of writing and preserving bulletproof and error-proof code, all whereas greedy the intricacies of the Java language.Hardcore Java covers:

  • Use of the ultimate key-phrase to optimize and safeguard your Java classes.
  • Complete and thorough assurance of all kinds of nested sessions, together with how one can optimize nameless and internal classes.
  • Detailed dialogue of immutable gadgets, together with exact tips about whilst to take advantage of them (and whilst now not to).
  • Elimination of insects via exception-handling management.
  • In-depth experiences of constants, together with their impression at the Java reminiscence model.
  • The such a lot thorough dialogue of mirrored image in print, relocating a long way past different books' "Hello global" coverage.
  • Construction and use of dynamic proxies, in either Java usual and firm editions.
  • Expansive insurance of vulnerable references, together with utilization styles and their position in rubbish assortment and reminiscence management.

Hardcore Java is a useful addition to each programmer's library, or even the main complicated builders will locate themselves relocating past their very own conceptions into really complex purposes of the language. millions of strains of code, seriously commented and simply runnable, illustrate each one suggestion within the book.

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Extra resources for Hardcore Java

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The queue was used as the argument in the createProducer method. createProducer(queue); Next, a TextMessage was created using the createTextMessage method. A TextMessage is one of several interfaces derived from the Message interface. These JMS interfaces represent different types of messages used within JMS. The setText method assigned a string to be sent. setText(message); The messageProducer then sent the message. send(textMessage); The output was displayed in the log file used by the SalutationMessageBean.

In the JSPExample-ejb module, we will create a remote session bean called ConstantsBean with methods returning common math constants. We will place it in the packt package. jsp from which we will invoke the EJB. The ConstantsBean is a remote stateless session bean. The bean extends a remote interface, ConstantsBeanRemote, which defines the methods of the bean. These methods include getPI and getGoldenRatio both returning a double value. @Remote public interface ConstantsBeanRemote { public double getPI(); public double getGoldenRatio(); } The ConstantsBean implements this interface and is declared as a stateless session bean.

There are three sections of the JSP page referencing and using the bean. The first section declared the reference variable constantsBean. <%! ConstantsBeanRemote constantsBean; %> The second created the initial context and returned a reference to the bean. Notice the global JNDI name was used to locate the bean. printStackTrace(); } %> The last section used both methods of the ConstantsBean. getGoldenRatio() %> 37 Getting Started With EJBs See also The Accessing the session bean using JNDI recipe, discusses the use of JNDI in more detail.

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