How to access static inner classes from the outside

1. The outer class needs to create an object of the inner class to access the members of the inner class, and then you can access any member of the inner class, including private members, and it should be noted that the member inner class cannot have static members.

Second, the inner class can not be instantiated directly, it can only be through the external class, but the static members require the system to initialize by default, so there will be contradictions, and the good way to solve it is to stipulate: the internal class of the member can not have static members, static initialization blocks, static methods, etc.

3. If you call an inner class in the static method (which is initialized when the class is loaded), you must first create an outer class.

Let's talk about nested classes: If you don't need a connection between an inner class object and its outer class object, you can declare an inner class as static. This is often referred to as nested

class）。To understand what static means when applied to an inner class, you have to keep in mind that a normal inner class object implicitly holds a reference to the outer class object that created it. However, when internal.

This is not the case when the class is static. Nested classes mean:

1.To create an object of a nested class, you do not need an object of its peripheral class.

2.You can't access a non-static peripheral class object from an object of a nested class.

First of all, the inner static class and its members must be public or protected, public can be directly accessed from the outside, and protected can only be accessed through inheritance.

If both its members and methods are static.

Direct access, such as:

Static members. Static methods.

However, if its members and methods are not static, they need to be accessed by creating objects.

Like what. public class a {

public static class b {public string c = "";

public void d()

To access member c and method d of the inner static class b

You need to create an object, such as.

ab = new ;

string w = ;

Outer classes. Inner classes. Static members (methods).

Because static classes and methods only talk about skins that belong to the class itself, and do not belong to objects of that class, let alone objects of other outer classes.

Static talk about the internal class of Shibi, defined in the class, outside of any method, with static definition implied; Static inner classes can only access static members of outer classes.

Generate (new) a static inner class without an outer class member: this is the difference between a static inner class and a member inner class. Objects of static inner classes can be generated directly:

in=new ；There is no need to generate by generating an external class object. This effectively makes the static inner class a top-level class. You can define private static inner classes.