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java.lang.reflect.Field.getDeclaredAnnotations() Method Example
Description
The java.lang.reflect.Field.getDeclaredAnnotations() method returns all annotations that are directly present on this element. Unlike the other methods in this interface, this method ignores inherited annotations. (Returns an array of length zero if no annotations are directly present on this element.) The caller of this method is free to modify the returned array; it will have no effect on the arrays returned to other callers.
Declaration
Following is the declaration for java.lang.reflect.Field.getDeclaredAnnotations() method.
public Annotation[] getDeclaredAnnotations()
Returns
All annotations directly present on this element.
Example
The following example shows the usage of java.lang.reflect.Field.getDeclaredAnnotations() method.
Live Demopackage com.tutorialspoint; import java.lang.annotation.Annotation; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.reflect.Field; public class FieldDemo { public static void main(String[] args) throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException { Field field = SampleClass.class.getField("sampleField"); Annotation[] annotations = field.getDeclaredAnnotations(); for(Annotation annotation : annotations){ if(annotation instanceof CustomAnnotation){ CustomAnnotation customAnnotation = (CustomAnnotation) annotation; System.out.println("name: " + customAnnotation.name()); System.out.println("value: " + customAnnotation.value()); } } } } @CustomAnnotation(name = "SampleClass", value = "Sample Class Annotation") class SampleClass { @CustomAnnotation(name="sampleClassField", value = "Sample Field Annotation") public String sampleField; public String getSampleField() { return sampleField; } public void setSampleField(String sampleField) { this.sampleField = sampleField; } } @Retention(RetentionPolicy.RUNTIME) @interface CustomAnnotation { public String name(); public String value(); }
Let us compile and run the above program, this will produce the following result −
name: sampleClassField value: Sample Field Annotation
java_reflect_field.htm
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