Takes the Class finds the specified field and returns the annotation other wise returns null - Java java.lang.annotation

Java examples for java.lang.annotation:Field Annotation

  1. HOME
  2. Java
  3. java.lang.annotation
  4. Field Annotation

Description

Takes the Class finds the specified field and returns the annotation other wise returns null

Demo Code


//package com.java2s;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;

public class Main {
    public static void main(String[] argv) throws Exception {
        Class clazz = String.class;
        String field = "java2s.com";
        Class annotationClass = String.class;
        System.out.println(getAnnotationForFieldofClass(clazz, field,
                annotationClass));/*from   w ww.j  a  v  a2s .c o  m*/
    }

    /**
     * Takes the Class finds the specified field and returns the annotation
     * other wise returns null
     * 
     * @param clazz
     * @param field
     * @param annotationClass
     * @return
     */
    public static Annotation getAnnotationForFieldofClass(Class clazz,
            String field, Class annotationClass) {
        String s = "";
        Field[] fields = clazz.getDeclaredFields();
        Annotation annotation;
        for (Field f : fields) {
            String theField = f.toString();
            if (field.equalsIgnoreCase(theField.substring(theField
                    .lastIndexOf(".") + 1))) {
                annotation = f.getAnnotation(annotationClass);
                if (annotation != null) {
                    return annotation;
                }
            }
        }
        return null;
    }
}

Related Tutorials