Recommended 10 articles for external classes

This article mainly introduces the C # interface in the derived class and the external class call method, combined with the instance form analysis of C # Interface definition and specific use method, the need for friends can refer to the example of this article describes the C # interface in the derived class and the external class call method. Share it for your reference, as follows: C # interfaces are created by interface keywords, which can include attributes, methods, and other member variables in the interface. A derived class of an interface can implement a method in an interface. A class can inherit multiple interfaces to implement methods in these interfaces, and an interface can derive methods from multiple class interfaces that can be implemented by one or more of these classes. A method in an interface can be called directly in a derived class of an interface. In a derived class call Example://Interface public interface ipersonalservice{//interface method personaldto querybyuid (int uId)

1. Detailed description of the C # interface invocation methods in derived and external classes example

Introduction: This article mainly introduces the C # interface in the derived class and the external class call method, combined with instance form analysis of C # Interface definition and specific use method, the need for friends can refer to the following

2. Java access Control-take you to learn more about the Protected keyword (figure)

Summary: Within a class, its members can be accessed by other classes, depending on the modifier of that member, and whether a class can be accessed by another class, depending on the class's modifiers. There are four classes of class member access rights modifiers in Java: Private, package access, protected, and public, where only package access and public can modify an external class. A lot of Java books on the introduction of protected more general, will cause misunderstanding to everyone. This paper focuses on the connotation and usage of protected keywords, and introduces some other modifiers.

3. Java Internal class explanation

Summary: A Java inner class is a class defined inside another class, where methods can access fields that contain their external classes. This is a relatively complex technique in which the inner classes are used primarily to design between classes that have collaborative relationships. Especially in the Java processing GUI event has been widely used. In addition, the most common reasons for internal classes are the following: An inner class method can access data in the scope of the class definition, including private data inner classes can be hidden from other classes in the same package using anonymous inner classes to define the callback function is very convenient

4.04.Java base-Class

Summary: Overview in Java, a class can be defined inside another class or inside a method, such as an inner class. The broad sense of inner class generally includes these four kinds: member inner class, local inner class, anonymous inner class and static inner class member inner Class 1. The concept member inner class is the most common inner class, and it is defined as an internal 2. Instance/** * External class */class Outter { private int a = 10; static int B =

5.01.Java Base-Package

Summary: The three main features of Java object-oriented: encapsulation, inheritance and polymorphism, while encapsulation and inheritance are basically polymorphic services. Encapsulation (encapsulation) is an important principle of object-oriented approach, which is to combine the object's attributes and operations (or services) into a separate whole, and to hide as much as possible the internal implementation details of the object. The above is the Baidu Encyclopedia of the package interpretation, in fact, is the privatization of class member variables, and provide public methods to access these member variables. A member variable is declared as a private member, it cannot be accessed directly through an external class, thereby

6. The private modifier in Java is invalidated

Introduction: This article mainly introduces the private modifier in Java is invalid? This article discusses a phenomenon in which a private member variable or method of an external class can be accessed within an inner class, and a friend may refer to the following

7. Use of internal classes in Java

Introduction: The role of internal classes 1. The inner class provides a better encapsulation that hides the inner class inside the outer class and does not allow access to other classes in the same package. 2. The method of the inner class can access all the data of the external class directly. 3. More convenient to use.

8. Usage of internal classes and anonymous inner classes

Summary: Inner classes can call methods of the outer class, and if the inner class has the same name, the method must be called with the "OuterClass.this.MethodName ()" format, where Outerclass and MethodName are replaced with the actual external class name and its method; this is the keyword , which represents a reference to an external class), and if the inner class does not have the same name, the method of the perimeter class can be called directly. However, the outer class cannot invoke the private method of the inner class directly, nor can the external class directly invoke the private method of the other class. Note: An inner class that uses an external class directly is independent of the method's permissions and is static, depending on whether the inner class has a method of the same name

9. Some summary of Java internal classes

Summary: 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.

Java internal class final semantic implementation

Summary: This article describes the variable information of an external class that is often referenced in a Java inner class. But how these variable information is passed to the inner class does not have a corresponding clue on the surface. This article describes how these semantics are implemented in the inner class from the bytecode layer.

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