Java Reflection - Class.getDeclaredAnnotationsByType() Examples

Class:

java.lang.Class

Method:

public <A extends Annotation> A[] getDeclaredAnnotationsByType(Class<A> annotationClass)

The method returns this class's annotation(s) for the specified type if such annotations are either directly present or indirectly present.

Type Parameters:: A - the type of the annotation to query for and return if directly or indirectly present
Parameters:: annotationClass - the Class object corresponding to the annotation type
Returns:: all this element's annotations for the specified annotation type if directly or indirectly present on this element, else an array of length zero

Examples

package com.logicbig.example.clazz;

import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.Arrays;

public class GetDeclaredAnnotationsByTypeExample {

    public static void main(String... args) {
        System.out.println("-- annotations by type--");
        Deprecated[] d = MyClass.class.getAnnotationsByType(Deprecated.class);
        System.out.println(Arrays.toString(d));

        MyAnnotation[] m = MyClass.class.getAnnotationsByType(MyAnnotation.class);
        System.out.println(Arrays.toString(m));
    }

    @Deprecated
    public static class MyClass extends MySuperClass {
    }

    @MyAnnotation
    public static class MySuperClass {
    }

    @Retention(RetentionPolicy.RUNTIME)
    @Inherited
    private static @interface MyAnnotation {
    }
}

Output

-- annotations by type--
[@java.lang.Deprecated(forRemoval=false, since="")]
[@com.logicbig.example.clazz.GetDeclaredAnnotationsByTypeExample$MyAnnotation()]

Java Reflection - Class.getDeclaredAnnotationsByType() Examples

Class:

Method:

Examples

Output

See Also