Java Class getAnnotatedInterfaces()用法及代碼示例

java.lang.Class類的getAnnotatedInterfaces()方法用於獲取此類中存在的超接口類型注釋。該方法返回存在的注釋數組。

用法:

public Annotation[] getAnnotatedInterfaces()

參數：此方法不接受任何參數。

返回值：此方法返回存在的超接口類型注釋的數組。

下麵的程序演示了getAnnotatedInterfaces()方法。

範例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())); 
    } 
}

輸出：

Class represented by myClass:class Test
AnnotatedInterfaces of myClass:[sun.reflect.annotation.AnnotatedTypeFactory$AnnotatedTypeBaseImpl@4aa298b7]

範例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())); 
    } 
}

輸出：

Class represented by myClass:class Test
AnnotatedInterfaces of myClass:[]

參考： https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html#getAnnotatedInterfaces-

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