Analyze the instance structure of Java Class files

Structural Description

1. Class: external class, member (member internal class, static internal class), local internal class, anonymous internal class

2. interface: interface

3, []: array

4, enum: enumeration

5, annotation: annotation@interface

6, primitive type : Basic data type

7, void: No return value

Instance

@Test
public void test3(){
    Class<Object> c1 = Object.class;
    Class<Comparable> c2 = Comparable.class;
    Class<String[]> c3 = String[].class;
    Class<int[][]> c4 = int[][].class;
    Class<ElementType> c5 = ElementType.class;
    Class<Override> c6 = Override.class;
    Class<Integer> c7 = int.class;
    Class<Void> c8 = void.class;
    Class<Class> c9 = Class.class;
 
    int[] i1 = new int[10];
    int[] i2 = new int[100];
    Class<? extends int[]> c10 = i1.getClass();
    Class<? extends int[]> c11 = i2.getClass();
    // 只要数组的元素类型与维度一样，就是同一个Class
    System.out.println(c10 == c11);//true
}

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