Java Tutorials

Java is an object-oriented programming language, not only absorbs the various advantages of the C + + language, but also rejects the difficult to understand C + + inheritance, pointers and other concepts, so the Java language has a powerful and easy

The first thing to tell you is that the 5 states on the web are misleading, and threads in Java actually have 6 states. The statement of 5 states is actually the state of the early process. Status of the early process: The so-called " process State"

Annotations When you use @interface to customize annotations, the Java.lang.annotation.Annotation interface is automatically inherited and other details are automatically completed by the compiler. When you define annotations, you cannot inherit

Many beginners may not understand the use of static methods, here I say my understanding: The call to the static method does not depend on the creation class object The This keyword is not used in the static method because no objects need

Shiro's Unified certification authority Shiro is Apache below a simple, easy-to-use Java Permissions framework, for the monomer application, Shiro completely can be very good, fast to meet the requirements of the rights, so generally in the project,

In our normal development work, more or less can be exposed to multi-threaded programming or some concurrency problems, with the operating system and system hardware upgrades, concurrent programming is more and more used in our development, we use

The Mystery of 19.4 values () By deserializing the enumeration class, values () is the static () method added by the compiler. The compiler marks an enumeration class (enum) as the final class, so the enum class cannot be inherited. 19.5

A simple, dynamic array implementation Adding 10w of capacity based on array implementations the average is 0.4 seconds to delete all the capacity this efficiency is considerable below to look at the code together Package Com.array;import

Summary: In Java, an object must be properly initialized before it can be used, as defined by the Java specification. When instantiating an object, the JVM first checks that the correlation type has been loaded and initialized, and if not, the JVM

The Java collection is broadly divided into set, List, Queue, map four systems Where set represents an unordered, non-repeatable set, the list represents an ordered, repeating set, and a map represents a collection with a mapping relationship; queue

The previous article introduced the JVM memory model of the relevant knowledge, in fact, there are some content can be more in-depth introduction, such as the dynamic insertion of the constant pool, direct memory, and so on later time to perfect the

Java is an object-oriented programming language (OOP), and everything is an object. Several concepts: 1. References, references are used to manipulate objects, manipulation objects need to be referenced to complete, for example, the remote control

• JDK1.5 you can then use enum keyword to define an enumeration type with the following syntax structure: [public] enum Enumeration Name [implements interface list ] { Enumerating Objects 1 [, Enumeration Object 2] [,... ]; [ member variable 1; ] [

Learn to program the Java tutorial on programming it Tutorial collection framework released, welcome to visit via Xuebiancheng8.comThe collection framework in Java Name Incredibles is the framework for the collection. So what is a collection, which

Learn to program the Java tutorial Object-oriented (iv) published, Welcome to visit through the xuebiancheng8.comThis session is to analyze the Java object-oriented construction method. What is the construction method, the construction method is

Learn to Program Java learning Object-oriented (ii) published, please visit by xuebiancheng8.comThe concepts of classes and objects, properties, and methods in object-oriented objects have been analyzed earlier. Let's learn how to define a class.

One: The core components of the Java NiO?Java NIO consists of the following core components:==>channels==>buffers==>selectorsAlthough there are many classes and components in Java NIO, in my opinion, Channel,buffer and Selector form the core API.

From http://www.cnblogs.com/ggjucheng/archive/2012/12/16/2820841.html English from http://docs.oracle.com/javase/tutorial/java/nutsandbolts/while.html The while statement continuously executes the statement in the block when the specific

Hide Variables In a class, if the name of a variable is the same as that of the parent class, even if their types are different, in the subclass, variables with the same name of the parent class cannot be accessed directly through the variable

From http://www.cnblogs.com/ggjucheng/archive/2012/11/28/2793257.html Preface In an instance method or constructor, This references the object pointing to the current object-method call or constructor call. You can use this to reference any