object|php5| Loading | = This article is for Haohappy read | = Notes from the chapter classes and objects
| = translation-oriented + personal experience
| = Please do not reprint to avoid any unnecessary trouble that may occur, thank you
| = Welcome to criticize, hope and all PHP enthusiasts to progress together!
+-------------------------------------------------------------------------------+
*/
Section 12th-Automatic loading of
The mention of Java internal class (Inner Class) may be unfamiliar to many people, in fact, similar concepts in C + +, that is, nested class (Nested Class), about the difference between the two and the connection, in the following will be compared. The inner class looks at the surface, is to define a class in the class (see below, the inner class can be defined in many places), but it is not so simple, at first glance the inner class seems superfluous, and its usefulness may not be so significan
So far, the inner class we've seen seems to be just a name-hiding and code-organizing scenario. Although these features are useful, they do not seem particularly compelling. However, we have also overlooked another important fact. When you create your own inner class, the object of that class also has a link to the encapsulated object that encapsulates or generates an inner class. So they can access the members of that packaged object-no qualification required. In addition, the inner class has a
Section 12th-Automatic loading of classes
When you try to use an undefined class, PHP reports a fatal error. The workaround is to add a class that can include a file with include. After all, you know which class to use. However, PHP provides automatic loading of classes, which can save programming time. When you try to use a class that PHP does not organize into, it looks for a __autoload global function. I
Initialize event is raised and the Terminate event is raised immediately when the last reference to the object is disposed. However, these event methods can be called directly at any time during execution.
So it's common to see examples like this:
Class Cnbruce ' declares a classes named CnbrucePrivate CnrosePrivate Sub Class_InitializeCnrose= "My Name is Cnrose."End SubPrivate Sub Class_Terminate ()End SubEnd Class
Here, th
am the public method." NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;SELF.__FUNC2 () #func1间接调用了func2的私有方法 def__func2 (self):printself.name, print "I'm a private method." defclassfun (self):print self.name,print "I am the class method." defstaticfun (self):print s.name,print "I am a static method." Mc=myclass () mc.func1 () Calling class methods: using Adorners@classmethod def classfun (self): print self.name, print "I am the class method." def staticfun (self): print s.name, print "I'm a static me
Using Java Classes from ASP
COM components aren ' t the only way to use compiled code in your ASP applications. If ' re familiar with
Java, but have no way of wrapping your classes as COM objects (for example, to use JDK or J + + Standard),
You can still with Java from ASP. And here ' s how
Sure you have access to the C:\Most shared Hosting plans wouldn ' t allow this kind to access, but if you ' re devel
);
System.out.println (str);
}
Parsing text as a Date objectgiven a formatted time string, such as "2013-12-17 14:05:59", you need to convert it to a Date object to get a timestamp for other formatting operations, and you can continue calling the SimpleDateFormat class
Import java.text.ParseException;
Import Java.text.SimpleDateFormat;
Import java.util.Date;
public class Timetest {public
static void main (string args[]) {
string text
There are roughly 5 relationships between classes:
1, Dependencies (Dependency)
One-way, which means that a class relies on the definition of another class, where a change in one class affects another class, a "use a" relationship
If a depends on B, then B behaves as a local variable, method parameter, static method call, etc.
public class Person {public
void dosomething () {Card Card
= new card ();//local variable
...
}
}
public class Person
Java is an object-oriented language. Java Object-oriented has three main features: encapsulation, inheritance, and polymorphism.
Encapsulation: Encapsulate some attributes and methods into a class.
Inheritance: For example, subclass inherits some attributes and methods of the parent class.
Polymorphism: For example, a parent class has multiple sub-classes with different characteristics.
Here I will not explain much. Next I will mainly explain
Nested classes and Inner classes: classes defined inside a class are called nested classes, where nested classes that do not have static adornments are the inner classes we normally call, whereas nested
I. Classification of internal classes
Internal classes are mainly divided into ordinary internal classes, local internal classes, anonymous internal classes, nested internal classes (static internal
In java learning, internal Member classes, anonymous internal classes (small records in java learning), and java Anonymous
In java learning, member Internal classes and anonymous internal classes (small records in java learning)Author: Star)
Internal class:
Define another class in a class. Such a class is called an in
[Java]1. What are nested and internal classes?You can define another class within a class. This class is called the nested classes. It has two types:Static and non-static nesting classes. Static Nested classes are rarely used. The most important is non-static Nested classes,
Java Internal class (Inner Class), similar concepts in C + +, that is, nested classes (Nested Class), at first glance the inner class seems superfluous, its usefulness for beginners may not be so significant, but with its in-depth understanding, You will find that the Java designer is really well-intentioned in the inner class. Learning to use internal classes is part of Mastering Java Advanced Programming,
base class pointer points to a derived class object.2.3 Implementation of dynamic linking requires three conditions:1) The behavior that needs to be dynamically linked must be defined as the virtual function of the public property of the class;2) There is a subtype relationship between classes, which generally manifests as one class deriving from another class public ;3) You must first use the base class pointer to point to the object of the subtype
A Java Interface is a series of method declarations and a collection of Methods features. An Interface has only the features of a method and has no methods to implement it, therefore, these methods can be implemented by different classes in different places, and these implementations can have different behaviors (functions ).
I. Interface meaning:
1. Java interfaces, structures existing in the Java language, with specific syntaxes and structures; 2. A
Multiple inheritance and virtual base classes, multiple inheritance base classesMultiple inheritance of implicit classes describes classes with multiple direct base classes. Multi-inheritance brings two main problems:① Inherit the same name method from two different base classes
When a class depends on another specific class, it is easy to form a "strong coupling" relationship between the two. We usually abstract an interface based on a specific class and then let the class depend on this interface. This forms a "loose coupling" relationship, which is conducive to application expansion. We can use DI container and Dependency Injection container, that is, Dependency Injection container to manage interfaces and implementation classes
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.