Esempio di codice per la regola del nome qualificato dell'interno della classe Java

Breve descrizione:

Poiché di recente ho incontrato molte classi che richiedono la reflection, molte delle quali sono classi interne, elencherò di seguito le regole del nome completo delle classi interne.

Classe interna

I risultati del test dimostrano che, indipendentemente dal fatto che la classe interna sia statica o meno, il nome completo utilizzato è il seguente metodo di nomi:

Nome del pacchetto.Nome della classe esterna$Nome della classe interna

Codice di test:

package com.test;
public class InnerClassTest {
	class static StaticInner{
	}
	class Inner{}}
	}
	public static void main(String[] args) {
		StaticInner si = new StaticInner();
		Inner in = new InnerClassTest().new Inner();
		System.out.println(si.getClass());
		System.out.println(in.getClass());
	}
}

Stampa i risultati:

classcom.test.InnerClassTest$StaticInner
classcom.test.InnerClassTest$Inner

Inner class anonima

Il nome completo dell'inner class anonima soddisfa il seguente schema:

Il nome del pacchetto. Nome della classe esterna$da 1 in poi, in ordine crescente secondo l'ordine di caricamento della classe

Test code

package com.test;
public class InnerClassTest {
	static Object staticAnClass = new Object(){
	}
	;
	static Object staticBlockAnClass;
	static {
		staticBlockAnClass = new Object(){
		}
		;
	}
	Object anClass = new Object(){
	}
	;
	Object blockAnClass;
	{
		blockAnClass = new Object(){
		}
		;
	}
	public static void main(String[] args) {
		InnerClassTest functionClass = new InnerClassTest(){
		}
		;
		System.out.println(staticAnClass.getClass());
		System.out.println(staticBlockAnClass.getClass());
		InnerClassTest test = new InnerClassTest();
		System.out.println(test.anClass.getClass());
		System.out.println(test.blockAnClass.getClass());
		System.out.println(functionClass.getClass());
	}
}

Stampa i risultati:
class com.test.InnerClassTest$1
class com.test.InnerClassTest$2
class com.test.InnerClassTest$3
class com.test.InnerClassTest$4
class com.test.InnerClassTest$5

Local inner class

The full qualified name of the local inner class uses the following naming method:

The package name followed by the external class name, then followed by a positive integer starting from 1 and followed by the local class name - the number part is the order in which the local class appears in the context of the external class.

Test code

package com.test;
public class InnerClassTest {
	public static void main(String[] args) {
		functionA();
		functionB();
	}
	public static void functionA() {
		class Inner {
		}
		;
		System.out.println(new Inner().getClass());
	}
	public static void functionB() {
		class Inner {
		}
		;
		System.out.println(new Inner().getClass());
	}
}

The print result of the above example:　

class com.test.InnerClassTest$1Inner　
class com.test.InnerClassTest$2Inner　
The result after swapping the positions of functionA, B in main on the basis of the test code:　
class com.test.InnerClassTest$2Inner　
class com.test.InnerClassTest$1Inner　
The result of swapping the declaration positions of functionA, B on the basis of the test code:　
class com.test.InnerClassTest$2Inner　
class com.test.InnerClassTest$1Inner

Summary

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