Javassist - add annotation to class doesn't work on reflections --------------------------------------------------------------- Key: JASSIST-256 URL: https://issues.jboss.org/browse/JASSIST-256 Project: Javassist Issue Type: Bug Affects Versions: 3.20.0-GA Environment: JDK1.7, IDEA Reporter: Rui C. Assignee: Shigeru Chiba Priority: Minor Fix For: 3.21.0-GA {code:java} ClassPool pool = ClassPool.getDefault(); CtClass superclass = pool.getCtClass(AbstractEntity.class.getName()); CtClass cc = pool.makeClass("com.rapid.develop.entity.Ponit", superclass); ClassFile ccFile = cc.getClassFile(); ConstPool constpool = ccFile.getConstPool(); AnnotationsAttribute attr = new AnnotationsAttribute(constpool, AnnotationsAttribute.visibleTag); Annotation entityAnno = new Annotation("Entity", constpool); Annotation tableAnno = new Annotation("Table", constpool); tableAnno.addMemberValue("name", new StringMemberValue("test", ccFile.getConstPool())); attr.addAnnotation(entityAnno); attr.addAnnotation(tableAnno); ccFile.addAttribute(attr); Class clazz = cc.toClass(); Object o = clazz.newInstance(); assertTrue(o.getClass().getName().equals("com.rapid.develop.entity.Ponit")); // annotations length = zero java.lang.annotation.Annotation[] annotations = clazz.getDeclaredAnnotations(); assertEquals(2, annotations.length); {code} I used javassist to add annotation for class， I saw these annotations were added to class file. But I can't get them using java API clazz.getDeclaredAnnotations() and clazz.getAnnotations()