Java access static nested class [duplicate]

Question

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Java inner class and static nested class (28 answers)

Closed 8 years ago.

How can i create a instance of the following Class and access its methods. Example:

public class A {
 public static class B {
 public static class C {
 public static class D {
 public static class E {
 public void methodA() {}
 public void methodB(){}
 }
 }
 }
 }
}

• khachik: A.B.C.D.E e = new A.B.C.D.E(); not sure what "How" means.
• Andreas: FYI: A class declared inside another class is called a nested class. If it is non-static, it is also called an inner class. Since your classes are static, they are generally called static nested classes. They are definitely not inner classes. JLS §8.1.3. Inner Classes and Enclosing Instances: An inner class is a nested class that is not explicitly or implicitly declared static.
• Lew Bloch: OP, have you looked this up in the Java documentation? The JLS answers this question. FYI, the documentation for things, like, oh, the Java language for example, is very useful.

Answer 1

You can use :

A.B.C.D.E e = new A.B.C.D.E();//create an instance of class E
e.methodA();//call methodA 
e.methodB();//call methodB

Or like @Andreas mention in comment you can use import A.B.C.D.E;, so if your class is in another packager then you can call your class using name_of_package.A.B.C.D.E like this:

import com.test.A.B.C.D.E;
// ^^^^^^^^------------------------name of package
public class Test {
 public static void main(String[] args) {
 E e = new E();
 e.methodA();
 e.methodB();
 }
}

• Andreas: or import A.B.C.D.E; E e = new E();. And you need to qualify first E too, without the import. --- And for completeness, you might mention how it works if A is in a package.
• Youcef LAIDANI: yes @Andreas this is also can solve the problem check my edit
• Andreas: Arrsyss? If that was supposed to be example for package, then it should be lowercase, and a better example might be org.example.
• Youcef LAIDANI: no no @Andreas my mistake check now