{"id":16719,"date":"2024-03-15T13:30:36","date_gmt":"2024-03-15T13:30:36","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-can-we-retrieve-annotations-on-attributes-in-java\/"},"modified":"2025-08-07T05:18:57","modified_gmt":"2025-08-07T05:18:57","slug":"how-can-we-retrieve-annotations-on-attributes-in-java","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-can-we-retrieve-annotations-on-attributes-in-java\/","title":{"rendered":"How can we retrieve annotations on attributes in Java?"},"content":{"rendered":"

In Java, annotations on attributes can be obtained through reflection. The following are the steps for obtaining annotations on attributes.<\/p>\n

    \n
  1. Get the Class object of the attribute.<\/li>\n
  2. retrieve the declared field<\/li>\n
  3. retrieve the annotation<\/li>\n<\/ol>\n

    Here is an example code:<\/p>\n

    import<\/span> java.lang.annotation.*;\r\n\r\n@Retention(RetentionPolicy.RUNTIME)<\/span>\r\n@interface<\/span> MyAnnotation {\r\n    String value<\/span>()<\/span>;\r\n}\r\n\r\nclass<\/span> MyClass<\/span> {\r\n    @MyAnnotation(\"\u793a\u4f8b\u6ce8\u89e3\")<\/span>\r\n    private<\/span> String myField;\r\n\r\n    public<\/span> String getMyField<\/span>()<\/span> {\r\n        return<\/span> myField;\r\n    }\r\n}\r\n\r\npublic<\/span> class<\/span> Main<\/span> {\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(String[] args)<\/span> throws<\/span> NoSuchFieldException {\r\n        MyClass<\/span> obj<\/span> =<\/span> new<\/span> MyClass<\/span>();\r\n\r\n        \/\/ \u83b7\u53d6\u5c5e\u6027\u5bf9\u8c61<\/span>\r\n        Class<?> cls = obj.getClass();\r\n        Field<\/span> field<\/span> =<\/span> cls.getDeclaredField(\"myField\"<\/span>);\r\n\r\n        \/\/ \u83b7\u53d6\u5c5e\u6027\u4e0a\u7684\u6ce8\u89e3\u5bf9\u8c61<\/span>\r\n        MyAnnotation<\/span> annotation<\/span> =<\/span> field.getAnnotation(MyAnnotation.class);\r\n        System.out.println(annotation.value());\r\n    }\r\n}\r\n<\/code><\/pre>\n
    The output shows “Example annotation,” indicating that the annotation on the property has been successfully retrieved.<\/p>\n","protected":false},"excerpt":{"rendered":"
    In Java, annotations on attributes can be obtained through reflection. The following are the steps for obtaining annotations on attributes. Get the Class object of the attribute. retrieve the declared field retrieve the annotation Here is an example code: import java.lang.annotation.*; @Retention(RetentionPolicy.RUNTIME) @interface MyAnnotation { String value(); } class MyClass { @MyAnnotation(“\u793a\u4f8b\u6ce8\u89e3”) private String myField; […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[453,1402,299,1404,1403],"class_list":["post-16719","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-development","tag-guide","tag-programming","tag-technology","tag-tutorial"],"yoast_head":"\nHow can we retrieve annotations on attributes in Java? - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn about how can we retrieve annotations on attributes in java?. 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