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Inner-class explanation1. DefinitionThe definition of a class is placed inside another class, and this class is called an inner class.Java codepublic class First {public class contents{public void F () { System.out.println ("in class
Original Digest from: http://android.blog.51cto.com/268543/384844/An inner class is a class that is redefined inside an outer class. The class name does not need to be the same as the folder. * Inner classes can be static, or
You can place the definition of one class inside the definition of another class, which is the inner class.The definition of an inner class is simple, but its syntax is really complex and not very well understood. The following is a summary of the
/* Why do internal classes have direct access to members of external classes? That's because the inner class holds references to external classes. External class name. this*/classouter{intnum = 3; classInner {intnum = 4; voidShow () {intnum = 5;
First, what is nested class and internal class?
You can define another class within a class, called a nested class (nested classes), which has two types:Static nested classes and non-static nested classes. Static nested classes use few, most
In the previous posting several times to use the Click event Processing implementation, a friend asked, found a lot of button click Implementation, but there are many blog use of the implementation of the way there are not the same, in the end is
What is reflection? Reflection is the mapping of the various components in the bytecode into the corresponding Java class, Java reflection technology since JDK1.1 has emerged, most popular frameworks have adopted this technology, it is important to
A class defined inside a class is called an inner class, and the host of the inner class is the outer class. The Java inner class includes the member inner class, the local inner class, and the anonymous inner class.1. member Inner classAccess
1. static inner classes (static inner Class): Only static member variables and static methods of external classes can be accessed, and static inner class objects are generated in the following way:Outerclass.innerclass inner = new
Dark Horse Programmer--java Foundation--Inner class------Java Training, Android training, iOS training,. NET training, look forward to communicating with you! -------Inner classIf class a requires direct access to the Members in class B , then
Java interface Syntax Details1, the default interfaceIn Java, you can use interface to define the behavior appearance of abstractions, such as methods in an interface that can be declared public abstract. For example:public interface Swimmer{
interface Default MethodThe default method of the interface is added after the Java8 version, not only the abstract method, but also the interface can contain several instance methods, define the instance method within the interface (but note that
Inner classes are divided into: local inner classes: Local inner classes are classes defined in the methods of a class. Note: Because the local inner class can only be accessed in the method in which it resides, the local inner classaccess control
Method Rewrite essentials:
1. A method in a subclass returns a value type, a method name, and a parameter list exactly the same as a method in the parent class. 2. The modifier level of a subclass method cannot be lower
An internal class
1 member Inner class
???????????? Class 1.1, outside called outer outer class, inside called inner inner class
????????????? 1.2 Inner class usually attendant outside class, externally with invisible
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Inner class Advantages: 1. Members of external classes can be accessed directly, including private.Members of an external class can be accessed directly because the inner class holds a reference to an external class, in the form of an external class
Why use lambda expressionslet's look at a few examples:
The first example is to perform a task in a separate thread, as we usually do:
Class Worker implements Runnable {public
void run () {for
(int i = 0; i
The second example,
Overview
The recent study of Python, discovering that Python supports multiple inheritance, reminds me that Java is the set of mechanisms that are implemented through internal classes. This article is not about how to implement multiple inheritance
1. Annotations (note: 5)
Annotation use style (annotation style)This check allows you to control the style of the annotations you want to use.Missing deprecated (lack of DEPRECAD)Check whether the Javadoc markup for the java.lang.Deprecated
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