Contents - Cultural View
Contents - Cultural View Contents - Cultural View
Java: View Technologies and Frameworks 200 Wicket • Wicket provides a 'Component' view technology - meaning the Request-Response Stateless paradigm of HTTP is abstracted away to give rise to an Object Oriented Stateful paradigm. • Pages now directly interact with Stateful Java Components on the server. • Components and their State are managed by the Wicket framework, freeing the application developer from having to use HttpSession directly to manage state themselves. • Further, Wicket provides for a clear separation of HTML markup from code, and there are no XML configuration files to manage. • Web page components are 'pushed' into the HTML markup from the code. • Competitor: Tapestry, JSF Tapestry • Tapestry provides a 'Component' view technology. • Classes are written as POJOs and Annotations are used to configure them as Tapestry components. • HTML components can directly refer to the component methods and attributes. • Competitor: Wicket, JSF References • Java Servlet Technology (http:/ / java. sun. com/ products/ servlet/ ) • JavaServer Pages Technology (http:/ / java. sun. com/ products/ jsp/ ) • Apache Struts 2 Documentation (http:/ / struts. apache. org/ 2. 1. 6/ docs/ home. html) • Apache Struts Tiles (http:/ / struts. apache. org/ 1. x/ struts-tiles/ ) • Click Framework Project Documentation (http:/ / incubator. apache. org/ click/ )
JavaBeans Activation Framework 201 JavaBeans Activation Framework JavaBeans Activation Framework, or JAF, enables developers to: [1] determine the type of an arbitrary piece of data; encapsulate access to it; discover the operations available on it; and instantiate the appropriate bean to perform the operation(s). It also enables you to dynamically register types of arbitrary data and actions associated with particular kinds of data. Additionally, it enables a program to dynamically provide or retrieve JavaBeans that implement actions associated with some kind of data. External links • Java Technologies [2] References [1] JavaBeans Activation Framework (http:/ / java. sun. com/ javase/ technologies/ desktop/ javabeans/ jaf/ ). Retrieved 2010-07-06. [2] http:/ / java. sun. com/ javase/ technologies/ desktop/ javabeans/ jaf/ downloads/ index. html JavaThreads Simply put, a thread is a program's path of execution. Most programs written today run as a single thread, causing problems when multiple events or actions need to occur at the same time. Let's say, for example, a program is not capable of drawing pictures while reading keystrokes. The program must give its full attention to the keyboard input lacking the ability to handle more than one event at a time. The ideal solution to this problem is the seamless execution of two or more sections of a program at the same time. Threads allows us to do this. Multithreaded applications deliver their potent power by running many threads concurrently within a single program. From a logical point of view, multithreading means multiple lines of a single program can be executed at the same time, however, it is not the same as starting a program twice and saying that there are multiple lines of a program being executed at the same time. In this case, the operating system is treating the programs as two separate and distinct processes. Under Unix, forking a process creates a child process with a different address space for both code and data. However, fork() creates a lot of overhead for the operating system, making it a very CPU-intensive operation. By starting a thread instead, an efficient path of execution is created while still sharing the original data area from the parent. The idea of sharing the data area is very beneficial, but brings up some areas of concern that we'll discuss later. Creating threads Java's creators have graciously designed two ways of creating threads: implementing an interface and extending a class. Extending a class is the way Java inherits methods and variables from a parent class. In this case, one can only extend or inherit from a single parent class. This limitation within Java can be overcome by implementing interfaces, which is the most common way to create threads. (Note that the act of inheriting merely allows the class to be run as a thread. It is up to the class to start() execution, etc.) Interfaces provide a way for programmers to lay the groundwork of a class. They are used to design the requirements for a set of classes to implement. The interface sets everything up, and the class or classes that implement the interface do all the work. The different set of classes that implement the interface have to follow the same rules. There are a few differences between a class and an interface. First, an interface can only contain abstract methods and/or static final variables (constants). Classes, on the other hand, can implement methods and contain variables
- Page 153 and 154: JAMWiki 149 JAMWiki Developer(s) Ry
- Page 155 and 156: JGroups 151 JGroups Stable release
- Page 157 and 158: Java Class Library 153 Java Class L
- Page 159 and 160: Java Class Library 155 Alternative
- Page 161 and 162: Java Classloader 157 User-defined c
- Page 163 and 164: Java compiler 159 Java compiler A J
- Page 165 and 166: Java Development Kit 161 • jstack
- Page 167 and 168: Java Interface Definition Language
- Page 169 and 170: Java TV 165 See also • Xlet Exter
- Page 171 and 172: Java Work Framework 167 Database db
- Page 173 and 174: Java annotation 169 programmaticall
- Page 175 and 176: Java annotation 171 component.getAt
- Page 177 and 178: Java collections framework 173 Refe
- Page 179 and 180: Java syntax 175 Java syntax The syn
- Page 181 and 182: Java syntax 177 Double quote \" Tab
- Page 183 and 184: Java syntax 179 import statement Th
- Page 185 and 186: Java syntax 181 switch statement Sw
- Page 187 and 188: Java syntax 183 outer: for (int i =
- Page 189 and 190: Java syntax 185 The catch and final
- Page 191 and 192: Java syntax 187 Reference types Ref
- Page 193 and 194: Java syntax 189 Foo.doSomething();
- Page 195 and 196: Java syntax 191 Modifiers • abstr
- Page 197 and 198: Java syntax 193 } public void walk(
- Page 199 and 200: Java syntax 195 Inheritance Interfa
- Page 201 and 202: Java syntax 197 /* Any Mapper insta
- Page 203: Java: View Technologies and Framewo
- Page 207 and 208: javac 203 References [1] http:/ / j
- Page 209 and 210: JavaFX 205 profile includes Swing a
- Page 211 and 212: JavaFX 207 External links • Offic
- Page 213 and 214: JExamples 209 JExamples Industry Co
- Page 215 and 216: Jikes 211 Jikes Developer(s) IBM St
- Page 217 and 218: Michael Kölling 213 Microsoft Pate
- Page 219 and 220: List of Java keywords 215 case catc
- Page 221 and 222: List of Java keywords 217 long nati
- Page 223 and 224: List of Java keywords 219 Reserved
- Page 225 and 226: Name mangling 221 Name mangling In
- Page 227 and 228: Name mangling 223 } }; }; /* = _ZN9
- Page 229 and 230: Name mangling 225 if (__1cGstrcmp6F
- Page 231 and 232: Name mangling 227 ['_Test__private_
- Page 233 and 234: Name mangling 229 External links
- Page 235 and 236: Patrick Naughton 231 See also • H
- Page 237 and 238: New I/O 233 FileChannel can be used
- Page 239 and 240: New I/O 235 // Pattern used to pars
- Page 241 and 242: New I/O 237 References [1] "JSR 51:
- Page 243 and 244: Omniscient Debugger 239 Omniscient
- Page 245 and 246: OpenJDK 241 Inclusion in software d
- Page 247 and 248: OpenJDK 243 [12] "Open JDK is here!
- Page 249 and 250: PHP/Java Bridge 245 References [1]
- Page 251 and 252: Java package 247 External links jav
- Page 253 and 254: Parboiled (Java) 249 } } return seq
Java: <strong>View</strong> Technologies and Frameworks 200<br />
Wicket<br />
• Wicket provides a 'Component' view technology - meaning the Request-Response Stateless paradigm of HTTP is<br />
abstracted away to give rise to an Object Oriented Stateful paradigm.<br />
• Pages now directly interact with Stateful Java Components on the server.<br />
• Components and their State are managed by the Wicket framework, freeing the application developer from having<br />
to use HttpSession directly to manage state themselves.<br />
• Further, Wicket provides for a clear separation of HTML markup from code, and there are no XML configuration<br />
files to manage.<br />
• Web page components are 'pushed' into the HTML markup from the code.<br />
• Competitor: Tapestry, JSF<br />
Tapestry<br />
• Tapestry provides a 'Component' view technology.<br />
• Classes are written as POJOs and Annotations are used to configure them as Tapestry components.<br />
• HTML components can directly refer to the component methods and attributes.<br />
• Competitor: Wicket, JSF<br />
References<br />
• Java Servlet Technology (http:/ / java. sun. com/ products/ servlet/ )<br />
• JavaServer Pages Technology (http:/ / java. sun. com/ products/ jsp/ )<br />
• Apache Struts 2 Documentation (http:/ / struts. apache. org/ 2. 1. 6/ docs/ home. html)<br />
• Apache Struts Tiles (http:/ / struts. apache. org/ 1. x/ struts-tiles/ )<br />
• Click Framework Project Documentation (http:/ / incubator. apache. org/ click/ )
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