Coreservlets.com: Java, JSF 2.0, Ajax, jQuery, Spring, Hibernate, REST, Hadoop, and GWT Training, Tutorials, Consulting, Books, & Resources Java SE APIs & Documentation Search Oracle.com Country Cloud AccountSign in to CloudSign Up for Free Cloud Tier Oracle Account Contact Sales Menu Java SE Documentation A wealth of information is available to help you learn and use Java platform technology. Visit the Java Platform Standard Edition Technical Documentation site for information on new features and enhancements, Java Tutorials, Developer Guides, API documentation, and much more. Know More Product License, Commercial Features and Terms README Files Java SE and JavaFX README files (HTML)Java SE, JavaFX and JRockit THIRDPARTYLICENSEREADME Files (HTML) README Archives README and THIRDPARTYLICENSEREADME text for archived versions of Java SE and JavaFX. Release Notes JDK Release Notes Note on Data Collection Information about the data Oracle collects during the installation and auto-update of the Java Runtime Environment (HTML, PDF) Note the JavaFX documentation overview page is now located here. Third party training authorization false
Paola Magillo, Univestita' di Genova, Corso di Interfacce Utente per Informatica, a.a. 2002-2003. [Per corso su Java vedere Gestione degli eventi in Java Classi per gli eventi Classi event listener, che definiscono modi di reagire a eventi di una certa classe Parte di AWT, usate anche in Swing. Classi di eventi Gli eventi sono classificati a seconda della loro causa scatenante, che puo' essere: un'azione fisica: cliccare mouse, muovere mouse, premere tasto su tastiera... Classi di eventi hanno nomi del tipo XXXEvent dove XXX e' la causa. Ogni classe di componente e' una potenziale sorgente di certe classi di eventi. Event listeners Posso registrare un event listener per ricevere eventi di una certa classe da una certa componente dell'interfaccia. Vi e' un'interfaccia event listener per ogni classe di evento: classe evento: XXXEventlistener: XXXListener Esempio: voglio catturare azionamento di un bottone. Implementare un listener Listener e adapter Font
B-Trees Introduction Tree structures support various basic dynamic set operations including Search, Predecessor, Successor, Minimum, Maximum, Insert, and Delete in time proportional to the height of the tree. Ideally, a tree will be balanced and the height will be log n where n is the number of nodes in the tree. To ensure that the height of the tree is as small as possible and therefore provide the best running time, a balanced tree structure like a red-black tree, AVL tree, or b-tree must be used. When working with large sets of data, it is often not possible or desirable to maintain the entire structure in primary storage (RAM). Instead, a relatively small portion of the data structure is maintained in primary storage, and additional data is read from secondary storage as needed. B-trees are balanced trees that are optimized for situations when part or all of the tree must be maintained in secondary storage such as a magnetic disk. The Structure of B-Trees Height of B-Trees B-Tree-Search(x, k)
Java Tutorial Blog Thought Spearmints: @SuppressWarnings and its applicability to various program elements I cooked up a toy Java 5 class that generates warnings of the "unchecked" family when compiled: package pholser.util; import java.util.Arrays; public class Stack<T> { private final Object[] storage; private int top; public Stack() { this.storage = new Object[ 5 ]; } public Stack( final Stack<T> other ) { this.storage = (Object[]) other.storage.clone(); this.top = other.top; final T currentTop = (T) storage[ top ]; } public void push( final T item ) { checkPrecondition( isFull(), "can't push a full stack" ); storage[ top++ ] = item; } public T pop() { checkPrecondition( isEmpty(), "can't pop an empty stack" ); return (T) storage[ --top ]; } public T peek() { checkPrecondition( isEmpty(), "can't peek an empty stack" ); return (T) storage[ --top ]; } @Override public boolean equals( final Object that ) { if ( this == that ) return true; if ( that == null || !getClass().equals( that.getClass() ) ) return false; final Stack<?> other = (Stack<? Sure enough, no warnings. Fair enough. Golden. or
How to Write a Custom Swing Component When you hear comparisons between AWT and Swing components, one of the first points mentioned is that Swing is lightweight. What this essentially means is that there are no real native controls "behind" Swing buttons, internal frames, and menus. Everything is controlled in pure Java, including rendering and event handling. Basic Building Blocks The Swing architecture overview provides an excellent high-level overview of the architectural decisions that were made during the development of Swing. The main building blocks of all core Swing components are: The component class itself, which provides an API for creating, changing, and querying the component basic state.The model interface and the model default implementation(s) that handle the component business logic and change notifications.The UI delegate that handles component layout, event handling (mouse and keyboard), and painting. Figure 1. The Component Class: UI Delegate Plumbing private static final String uiClassID = "FlexiSliderUI";
Why Developers Take Java Application Development As Most Desirable Platform? | Software and Web Development Company Java is among leading computer programming languages that is complex and object oriented. Developers perform Java application development using some concepts from C++, C, Small Talk and few other computer programming languages. It is the most versatile programming language used by developers for building web and mobile based apps in most efficient way. Due to vast advantages offered by Java, developers take it as a desirable platform to build complex and latest technology equipped applets for worldwide clients. 1. Being an open source appdevelopment platform, Java lowers the burden on developer’s pocket. 2. APIs available in Java can be easily accessed. 3. It also uses the stack management system for the object allocation. 4. With Java, application development can be more dynamic and deliver appealing outcomes. 5. Automatic Garbage collection feature is also offered by Java programming language. 6. Developers can design and intend applications securely. 7. 8.
Eamonn McManus's Blog: Getting rid of unchecked warnings for casts Posted by emcmanus on March 30, 2007 at 3:27 AM PDT If you've ever made a serious effort to get rid of "unchecked" warnings from the Java compiler (the ones it gives you with -Xlint:unchecked) then you'll probably have found some cases where you know a cast is correct but you can't convince the compiler of it. Is there anything better than adding @SuppressWarnings("unchecked") around the whole method? The problem with the @SuppressWarnings solution is that it's much too broad. It suppresses warnings for the whole method, even though it's just one little cast that you want to allow. Fortunately, there's a good solution. List<String> list = (List<String>) x; You can change it to this: List<String> list = cast(x); where the cast method is defined like this: @SuppressWarnings("unchecked")private static <T> T cast(Object x) { return (T) x;} If there several different classes where you need this method, you could make it public and put it in a utility class, say Util.java.
Why You Should Hire Skillful Java Developers for Application Development :: Software and Web Development Service Over the last decade, web and mobile application development have reached their paramount potential which lead to the establishment of bountiful web development companies. Out of the development frame works, Java is the widely accepted and extensively utilized programming language. It is a dynamic and innovative programming language extensively used for formulating apps which range from mobile applications to mainframe computers and venture servers. A Java developer having tremendous experience can develop phenomenal applications according to the client requirement by adopting an appropriate plan and applying his skill set to it. Java developer can efficiently deliver services in Enterprise Application development, web Services, Portal development as well as systems programming by utilizing his finesse and proficiency in Java development tool. Java developers in India have proven ability to develop accurate and impressive apps that match the requirement of any client.
Annotations Many APIs require a fair amount of boilerplate code. For example, in order to write a JAX-RPC web service, you must provide a paired interface and implementation. This boilerplate could be generated automatically by a tool if the program were “decorated” with annotations indicating which methods were remotely accessible. Other APIs require “side files” to be maintained in parallel with programs. The Java platform has always had various ad hoc annotation mechanisms. Annotations do not directly affect program semantics, but they do affect the way programs are treated by tools and libraries, which can in turn affect the semantics of the running program. Annotations complement javadoc tags. Typical application programmers will never have to define an annotation type, but it is not hard to do so. Once an annotation type is defined, you can use it to annotate declarations. @RequestForEnhancement( id = 2868724, synopsis = "Enable time-travel", engineer = "Mr. Here is the testing tool:
Learn To Facilitate Custom Java Development | Software and Web Development Company Java is one of the resourceful languages that help developers in facilitating custom development of web and applications for distinct companies. Credit goes to its secured and safe environment that allows developers and companies to embrace the tool for custom java application development projects. This open source programming language enables swift and easy development of appealing and engaging websites for several opportunists. Java developers can design both the online and offline applications without any hassle using custom development approach. To get succeed with custom development approach, developers need to determine the specific business needs to perform business tasks in most streamlined way. It’s the best idea to gather all the virtual needs of your company before much time and for this, essential requirements of your Java website or application has to be determined. 1. This is the most initial task for you if you want to make customized approach for java development. 2. 3.
Top Ten New Things You Can Do with NIO New I/O? Why do we need a new I/O? What's wrong with the old I/O? There's nothing wrong with the classes in the java.io package; they work just dandy -- for what they do. But it turns out there are quite a lot of things the traditional Java I/O model can't handle. Things like non-blocking modes, file locks, readiness selection, scatter/gather, and so on. NIO brings a host of powerful new capabilities to the Java platform. In this article I'm not going to explain buffers, channels, selectors, and the other denizens of the NIO depths. So, without further ado, in the time-honored tradition of O'Reilly authors flogging their own books by cooking up lame top ten lists: Top Ten New Things You Can Do with NIO That You Couldn't Do Before (TTNTYCDW..., oh never mind). 10: File Locking File locking is one of those things most programmers don't need very often. With NIO, file locks are built right into the FileChannel class. Figure 1: Reader processes holding shared locks.
Apprenez à programmer en Java Bonjour à tous ! :D Bienvenue dans mon cours de programmation en Java. C'est un langage très utilisé, notamment par un grand nombre de programmeurs professionnels, ce qui en fait un langage incontournable actuellement. Voici les caractéristiques de Java en quelques mots : Java est un langage de programmation moderne développé par Sun Microsystems (aujourd'hui racheté par Oracle). On peut faire de nombreuses sortes de programmes avec Java : des applications, sous forme de fenêtre ou de console ;des applets, qui sont des programmes Java incorporés à des pages web ; des applications pour appareils mobiles, avec J2ME ;et bien d'autres ! Comme vous le voyez, Java permet de réaliser une très grande quantité d'applications différentes ! Heureusement, ce cours est là pour tout vous apprendre de Java à partir de zéro :) .