of an anonymous class, and dynamically creating an instance of the anonymous class. The benefits of this writing are obvious, using interfaces to contract, and then actually using the business code when it is used. This makes the code much leaner, without the need to create a bunch of
This article uses regular expressions to filter some special files in the folder and print them out. This involves the file filter, which is applied to the anonymous class. Package date0815.demo1;/** * Java anonymous inner class * @author ZZW * */import java.io.file;impor
How to use anonymous internal classes to transform factory methods in section 8.8 from the ground up in java-7.8
In this section, we will revisit the factory method and use the anonymous internal class to transform the factory method.
Previous Article: 7.8 interface and factory Model
Example of the last factory method:
An overview: An object without a name, or an object that has no assigned value to any variable. An anonymous object is when an object is created, only the statement that created the object (the new object type), and there is no variable that receives the object.For example:Person class:public class Person { public void eat(){ System.out.println("吃饭"); }}Test classpublic
The so-called anonymous inner class is an inner class that has no name and is usually used only once for this type of inner class.An anonymous inner class must be declared as part of the new statement when it is created, and this will take another special form of the new sta
implement the definition class's inner, you can temporarily create an instance object of the anonymous subclass of Class A when passing parameters to the Callinner method, the code is as follows:Source: Outer.javaClasses Aabstract class a{abstract void display ();//declares an abstract class}//external classes public
Inheritance of inner classesInheriting anonymous inner classes in Java one of the things that ends up is that the constructor of the inner class must point to a reference to its perimeter object, so take a special syntax. The sample code given in the book can have a compiled version, and Enclosingclassreference.super () must be added within the constructor of the
The internal anonymous class is written in some Java books very abstract, in fact, this thing, if it is taken out alone, it is really difficult to make sense, I would have thought so abstract concept, and nothing to use. It never occurred to me that this thing is especially used in Android-programmed listeners. Anonymous
Basic Theory:
-----------------------------------------------------
Java internal class: the definition of an internal class is defined within another class.
The reason is:
1. An internal class object can access the implementation of the object created for it, includin
); System.out.println (Mc.getval ()); }}View CodePre-defined functional interfacesUsually we don't need to define the function interface ourselves, Java has provided some predefined functional interfaces.
Unaryoperator
Applies a unary operation to an object of type T and returns the result, with the method named apply.
Binaryoperator
Operates on two objects of type T and returns the result, with the method n
Java Tour (iv)-object oriented thinking, member/local variables, anonymous objects, encapsulation, private, construction methods, building blocks of code
Come on, it's going to be a little faster.
1. Overview
This is the length of the story, which focuses on the thought and the case
Take the buy computer, first, you do not understand the computer, you go to computer city to buy a
/* Anonymous object: No reference type variable points to an object called an anonymous object. Requirements: Use the java class to describe a student class. Things to note for anonymous objects:1. we generally do not assign prope
() {System.out.println ("---2---animal eat"); } Public void Sleep() {System.out.println ("---2---animal sleep"); } }}//Create a new test class Public class Test { Public Static void Main(string[] args) {Zoo z =NewZoo (); Animal an = Z.getanimal1 (); An.eat (); An.sleep (); Animal one = Z.getanimal2 (); One.eat (); One.sleep (); }}
Basic theory:
About Java Inner classes: an inner class is defined as a class that is defined within another class.
The reason for this exists is:
1. An object of an internal class can access the implementation of the object that created it, including private data. That is,
Let's look at the following code: Public classTest { Public Static voidMain (string[] args) {} Public voidTestFinal intb) {Final intA = 10; NewThread () { Public voidrun () {System.out.println (a); System.out.println (b); }; }.start (); }}This code will be compiled into two class files: Test.class and Test1.CLASS。ImpliedRecognizeCiaConditionUnder,CodecTranslatedManagerYesForPunicNameWit
(several input parameters, an output parameter), although there is no function declaration in Java, but Java can use interfaces to enforce the specification.Interface funcable { void Func ();}So as long as the class of the interface is implemented, there is a function signature and a consistent member function of void Func (well, it is not customary to call
(string[] args){Player P2 = new player () {public void Play (){System.out.println ("playing basketball");}};P2.play ();}}② interfaceInterface IPlayer{public void play ();}public class Anonymousinnerclasstest{public static void Main (string[] args){IPlayer ip2 = new IPlayer () {public void Play (){System.out.println ("playing basketball");}};}}third, the application of the threadThere are two ways to implement threading: ① inherits the Thread
The similarities and differences between closures and anonymous internal classes.
As mentioned earlier, the maximum limit for anonymous inner classes is the ability to reference variables (their ability to reference variables): They can only reference class variables (class variables) and local final variables (locally
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