static member variable

Today, when writing the constructor method, there is a small problem, caused by this problem a series of thinking, in a Java class in the initialization of variables and classes what is the order of execution?# # problems

Static global variable: can only be accessed in the current CPP to the static int s_global = 0;void Funca () {////static local variable (function static variable) initialized once will not be overwritten by the static int s_fun Cvalue = 1;}          

Reference:http://blog.csdn.net/morewindows/article/details/6721430Http://www.cnblogs.com/lzjsky/archive/2011/01/24/1943199.htmlWhen you analyze the QT program, you encounter the following code.QString str = QString ("Qframe#avatar{border-image:url (%

Object-oriented Basic concepts1, object-oriented (OOP, OOD) three major features: encapsulation, inheritance, polymorphism. Note that abstraction is not one of the characteristics2, object-oriented programming is to abstract the data, and functional

1. The alignment principle. For example, 64-bit bus, each address read 8B. Pay attention to the variable address when programming, and consume the least number of addresses of the bus. Heap memory request, the system is strictly aligned according to

The class initialization process for Java:1. Static member variable of parent class, static statement block.2. Static member variable of subclass, static statement block.3. Ordinary member variables of the parent class, constructors.4. Normal member

Using system; using system. collections. generic; using system. LINQ; using system. text; namespace consoleapplication1 {struct XYZ {public int A; Public int B; Public int C; bool B1 ;}; class program {// static variables are stored on the stack,

Java notes Java SE: Java Standard Edition for table-level application and database development; Java EE: Java Enterprise Edition for enterprise-level development; Java me: Java handheld edition for embedded and mobile development.   Chapt 1 1) Java

_ Declspec is used to specify the Microsoft-related storage method for the specified type of instance. Other modifiers related to storage methods, such as static and extern, are ANSI norms in the C and C ++ languages, while _ declspec is a

Singleton mode: Singleton class: 1. constructor needs to be marked as private (Access Control: prevents external code from using the new operator to create an object). The Singleton class cannot be instantiated in other classes, it can only be

1. Concepts of objects and classes:Object--The description of the objects in the problem domain by the computer language, and the objects are represented by properties and methods to represent the static and dynamic properties of things.Class-Class

The Singleton class has at least the following three common elements: Must have a constructor and must be marked private.has a static member variable that holds an instance of the class.Have a public static method that accesses this instance For

The singleton mode guarantees that there is only one instance of a class, 1, a static member variable holds the unique instance of the Class 2, declares that the constructor and clone method is private, prevents new an instance 3, provides a public

Android coding Specification I. Android coding specifications 1. the java code does not contain Chinese characters. A maximum of Chinese characters can appear in comments. 2. Local variable name and static member variable name: Only letters can be

This article mainly analyzes how the single-piece mode in the Ogre engine is used, that is, the analysis and use of the Ogre: Singleton class. Before getting started, I once again lamented that the highly handwritten things are different, not only

    This time, let's talk about "static.   Static member variable   As we all know, static member variables are the variables that only store one copy of the entire class. No matter how many objects you create through this class, all

Convention: Class name, first letter to uppercase, if more than one word, each first letter is uppercase, the rest of the letter lowercase.Constant name, with each letter capitalized.One: the concept of package: Create, use. 1. New Package:In the

1) to make an object a serialized object, this class implements the Serializable or Externalizable interface (Externalizable interface inheritance and serializable interface).This serialization only serializes the object's non-transient instance

Mode motiveFor some classes in the system, only one instance is important, for example, there can be multiple print tasks in a system, but only one task is working; a system can have only one window manager or file system; A system can have only one

This article introduces the Singleton mode method of php design mode instances. if you need to know more, refer to the reference singleton class: 1. the constructor needs to be marked as private, the singleton class cannot be any other This article