play1.2.4 version:
Inherit the class play. Playplugin, we can implement plug-in functionality.
The play framework itself is based on this class to provide some plugin that have been implemented, such as: Configurableplugindisablingplugin,coreplugin, Dbplugin, evolutions, Jobsplugin, Jpaplugin, Messagesplugin, Tempfileplugin,validationplugin, WS
This is where we
Theoretically, the action of struts 2.0 does not need to implement any interface or inherit any type. However, to facilitate the implementation of the action, the action will inherit from Com. opensymphony. xwork2.actionsupport class, And reload the string execute () method in this class (override.
It can be seen from
, multithreading is what we need to know. However, knowing when to use multithreading is far more important than knowing how to use multithreading. This is an instantiated object "Don't know, don't know.Next let's take a look at how multithreading is used in java.There are three methods to create a thread in java1. inherit the Thread class directly and override its run method.2. Implement the Runnable inter
Sub-classes inherit parent class private ask for details
test();?>In this code, the parent class has a private method. isn't the PHP rule that the subclass cannot inherit the private method of the parent class? but I have written a method of the same name in the subclass.
About child classes inheriting from the parent class constructor:
The subclass must call the constructor of the parent class. The parameterless constructor of the parent class is automatically called by default. If the parent class does not have a parameterless constructor, you must explicitly call a constructor
message prompts usInheritInnerOneWithInnerInstance.
Let's giveInheritInnerAdd the constructor with parameters that we reflect. The compilation fails, and the same error will be reported. This is because the syntax stipulates that, when inheriting internal classes, you must addenclosingClassReference.super().
class WithInner { class Inner {}}public class Inher
The final keyword can be used directly in 1.C11 so that the class cannot be inherited2. The derived class initializes the base class part by calling the constructor of the base class, and if the base class constructor is declared private, the link error occurs when the deriv
Public class Test1 { privateint t1 = 1; Public int getT1 () { return t1; } Public void setT1 (int t1) { this. T1 = t1; }} The above is the Test1 class, there is a private T1, the value is 1, gave the Get/set method. Public class extends Test1 { privateint t1 = 2; Public Static void Main (string[] args) { new Test
Static methods in a PHP class cannot inherit the public-decorated properties of other classes.
How can a static method in a PHP class not inherit the public-decorated properties of another class? such as the par.class.php and st.class.php codes are as follows:
par.class.php
Theoretically, the Action of Struts 2.0 does not need to implement any interface or inherit any type. However, to facilitate the implementation of the Action, the Action will inherit from com. opensymphony. xwork2.ActionSupport class, And reload the String execute () method in this class (Override.
It can be seen from
make sense, assuming that you want the corresponding string of the object to be meaningful?Overwrite in demo ()Public String toString () {return "demo:" +num;}Create your own string representation. The default of the parent class does not mean much, it is generally coveredWhen writing a descriptive narrative, these methods are likely to be overwritten, and then the problem arises.Assume all overwrite. Why don't you just abstract it and finish it?Afte
Can I execute some methods without inheriting a class? PHPcodeclassa {public $ table = ''; publicfunction _ contruct ($ table) {$ this- gt; table = $ can I execute some methods when I do not inherit a class?
PHP code
class a{ public $table = ''; public function __contruct($table) { $this->table=$tab
Key points:
In PHP, inheritance is a single inheritance, that is, one class can only inherit another class,
If you want a class to inherit multiple classes, you can use multiple inheritance methods, that is, Grandpa's variable father inherits, and Dad's variable son inherit
1. About Private Member variablesChild classes have these member variables in the parent class, regardless of whether the member variables in the parent class are private, common, or other types. However, private member variables in the parent class cannot be accessed directly in the subclass, and must be accessed through the protected, public methods (such as Ge
When constructing an object, the system constructs the parent class object before constructing the subclass object.Construct the order of an object: (Note: This is also the time to construct the parent class object)① constructs the parent class object recursively;② call this class member property to assign the initial
What are the problems encountered when inheriting the smarty class !! I copied the libs directory of smarty to the test project. the test project is simple and has two file demos. php and init. inc. php, and then in init. inc. php makes some configuration, such as the delimiter and template directory. if you use this method: PHPcode lt; to inherit from the problems encountered by the smarty
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.