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These days reading, began to see the Java inside the class, began to think back to see, you can read, the results see the time to monitor there is also no read.In other words, I write Java code has a problem, it may be written in C + + and C written more, is like to each of the classes are written in a separate file.There is no problem with nesting or a file that
In Java, there is a kind of class called inner class, also known as nested class, which is defined inside other classes. An internal class is a member of its external class. Like other members, it can directly access the data and
In Java, it is permissible to define another class within one class (or method, block of statements), called an inner class (Inner Class), sometimes called a nested class (Nested).There is a logical dependency between the inner
primarily used to support the main public classes.1. Each compilation unit (file) can have only one public class. This means that each compilation unit has a single common interface, which is represented by the public class. The interface can contain numerous classes that support package access, as required. If there is more than one public class within a compil
public class. This means that each compilation unit has a single common interface, which is represented by the public class. The interface can contain numerous classes that support package access, as required. If there is more than one public class within a compilation unit, the compiler gives the error message.2. The name of the public
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java实体类The full path of the package, just fill in the path, do not ne
Reprint Address: http://www.cnblogs.com/Coda/p/4346151.htmlJava know how much (8) class library and its organizational structureJava officially provides developers with a number of powerful classes that are placed in individual packages and published with the JDK, called Java class libraries or Java APIs.API (Applicati
Java officially provides developers with a number of powerful classes that are placed in individual packages and published with the JDK, called Java class libraries or Java APIs.API (Application Programming Interface, Application programming Interface) is a common concept.For example, I have written a
When writing Java simple program code, the default file name is usually the same as the class name of the main class (the class where the main method is located), and the Java code naming rules are as follows, the
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An internal anonymous class is an internal class that is built without naming you, that is, a variable that has no reference to the instance.New Windowadapter () {public voi
type to get the named public methodsMethod[] GetMethods ()--Get all the public methods of a classMethod Getdeclaredmethod (String name, class[] params)--Methods for naming a class declaration using the parameter type of a featureMethod[] Getdeclaredmethods ()--all methods of obtaining a class declaration1.2 Start usin
abstract class andJavaThe advantages of the interface, the design pattern of the refined code is out: the work of declaring type is still byJavainterface, but at the same time gives aJavaAbstract class, and implements this interface, and other specific classes that belong to this abstract type can choose to implement thisJavaInterface, you can also choose to inherit this abstract
qualified name of the class, the descriptor of the field and method, and the method name of the special method. Let's introduce these three special strings separately. (1) The fully qualified name of the classin a constant pool, the name of a type is not what we see in the source file, nor is it the package name plus the class name that we use in the source file. The fully qualified name in the source file
Anonymous Inner class Description:Anonymous inner class is also an inner class without a nameBecause there is no name, the anonymous inner class can only be used once, and it is often used to simplify code writingBut there is also a precondition for using anonymous inner classes: You must inherit from a parent
+ "" +outer_2); +}} 28//Instantiate internal class Innerclass ic=new innerclass (); Ic.inner_method1 (); Ic.inner_method2 (); System.out.println (ic.inner_1+ "" +ic.inner_2); 33//scope ends here {{} } Copy Code Third, anonymous inner class
The anonymous inner class is not an access modifier.2. Sometimes I prefer to use an anonymous inner
is modified, you also lose the ability to take any action. A simple consequence is that classes that contain public mutable domains are not thread safe. Even if a domain is final and does not point to any of the mutable objects, once you make the domain public, you give up the flexibility to "switch to a new internal data representation."
There is also an exception to the rule that "public classes should not contain public domain", and it is permissible to expose the constants of a
. That is, all the mutable states of an object are encapsulated and protected by the object's own built-in lock.Java monitor patterns are used in many classes, such as vectors and HashTable.The Java monitor pattern is just a convention for writing code that, for any kind of lock object, can be used to protect the state of an object as long as it is used throughout the object. As Privatelock shows how to use
Reference 51542059Anonymous classes, like names in Java, do not have a name identified in the class, of course, after compiling a name will be arranged.Here is a simple example of an anonymous class: Public classClient { Public Static voidMain (string[] args) throws interruptedexception {Thread T=NewThread (NewRunnable () {@Override Public voidrun () {System. out
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