Java 中的类 getAnnotatedInterfaces()方法，带示例
原文:https://www . geeksforgeeks . org/class-getannotatedinterfaces-method-in-Java-with-examples/
java.lang.Class 类 的GetanNOtatedinterface()方法用于获取该类中存在的超面类型注释。方法返回存在的注释数组。
语法:
public Annotation[] getAnnotatedInterfaces()
参数:该方法不接受任何参数。
返回值:这个方法返回一个存在的超面类型注释的数组。
下面的程序演示了 getAnnotatedInterfaces()方法。
例 1:
// Java program to demonstrate
// getAnnotatedInterfaces() method
import java.io.*;
import java.util.*;
import java.lang.annotation.*;
// create a custom Annotation
@Retention(RetentionPolicy.RUNTIME)
public @interface CustomInterface {
}
@CustomInterface
interface CustomInterfaceImp {}
class Test implements CustomInterfaceImp{
public Object obj;
public static void main(String[] args)
throws ClassNotFoundException
{
// returns the Class object for this class
Class myClass = Test.class;
System.out.println(
"Class represented by myClass: "
+ myClass.toString());
// Get the AnnotatedInterfaces
// using getAnnotatedInterfaces() method
System.out.println(
"AnnotatedInterfaces of myClass: "
+ Arrays.toString(myClass
.getAnnotatedInterfaces()));
}
}
输出:
由 myClass 表示的类:class Test AnnotatedInterfaces of my class:[sun . reflect . annotation . annotatedtypeffactory $ annotatedtypebaeimpl @ 4a a 298 b 7]
例 2:
// Java program to demonstrate
// getAnnotatedInterfaces() method
import java.io.*;
import java.util.*;
import java.lang.annotation.*;
class Test{
public Object obj;
public static void main(String[] args)
throws ClassNotFoundException
{
// returns the Class object for this class
Class myClass = Test.class;
System.out.println(
"Class represented by myClass: "
+ myClass.toString());
// Get the AnnotatedInterfaces
// using getAnnotatedInterfaces() method
System.out.println(
"AnnotatedInterfaces of myClass: "
+ Arrays.toString(myClass
.getAnnotatedInterfaces()));
}
}
输出:
由我的类表示的类:类测试 注释我的类:[]
参考:https://docs . Oracle . com/javase/9/docs/API/Java/lang/class . html # getAnnotatedInterfaces–
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