{"id":17260,"date":"2024-03-15T14:38:08","date_gmt":"2024-03-15T14:38:08","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-creating-custom-annotations-in-java\/"},"modified":"2025-08-07T09:50:43","modified_gmt":"2025-08-07T09:50:43","slug":"what-is-the-method-for-creating-custom-annotations-in-java","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-creating-custom-annotations-in-java\/","title":{"rendered":"What is the method for creating custom annotations in J…"},"content":{"rendered":"

In Java, the method for creating custom annotations is as follows:<\/p>\n

    \n
  1. Definition<\/li>\n<\/ol>\n
    public<\/span> @interface<\/span> MyAnnotation {\r\n    \/\/ \u6ce8\u89e3\u5143\u7d20<\/span>\r\n}\r\n<\/code><\/pre>\n
      \n
    1. Annotations can be applied to elements such as primitive data types, Strings, Classes, enum types, annotation types, or arrays of them.<\/li>\n<\/ol>\n
      public<\/span> @interface<\/span> MyAnnotation {\r\n    String value<\/span>()<\/span>;  \/\/ \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u6ce8\u89e3\u5143\u7d20<\/span>\r\n    int<\/span> count<\/span>()<\/span> default<\/span> 1<\/span>;  \/\/ \u5b9a\u4e49\u4e00\u4e2a\u6574\u6570\u7c7b\u578b\u7684\u6ce8\u89e3\u5143\u7d20\uff0c\u5e76\u8bbe\u7f6e\u9ed8\u8ba4\u503c\u4e3a1<\/span>\r\n}\r\n<\/code><\/pre>\n
        \n
      1. When using annotations, you can specify corresponding values for the annotation elements.<\/li>\n<\/ol>\n
        @MyAnnotation(value = \"Hello\", count = 3)<\/span>\r\npublic<\/span> class<\/span> MyClass<\/span> {\r\n    \/\/ \u7c7b\u7684\u5185\u5bb9<\/span>\r\n}\r\n<\/code><\/pre>\n
          \n
        1. Retrieve annotation information through reflection where annotations are needed.<\/li>\n<\/ol>\n
          MyAnnotation<\/span> annotation<\/span> =<\/span> MyClass.class.getAnnotation(MyAnnotation.class);\r\nString<\/span> value<\/span> =<\/span> annotation.value();  \/\/ \u83b7\u53d6\u6ce8\u89e3\u5143\u7d20\u7684\u503c<\/span>\r\nint<\/span> count<\/span> =<\/span> annotation.count();\r\n<\/code><\/pre>\n
            \n
          1. In places where annotations are needed, the use of default values for elements can simplify the use of annotations.<\/li>\n<\/ol>\n
            @MyAnnotation(\"Hello\")<\/span>\r\npublic<\/span> class<\/span> MyClass<\/span> {\r\n    \/\/ \u7c7b\u7684\u5185\u5bb9<\/span>\r\n}\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
            In Java, the method for creating custom annotations is as follows: Definition public @interface MyAnnotation { \/\/ \u6ce8\u89e3\u5143\u7d20 } Annotations can be applied to elements such as primitive data types, Strings, Classes, enum types, annotation types, or arrays of them. public @interface MyAnnotation { String value(); \/\/ \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u6ce8\u89e3\u5143\u7d20 int count() default 1; \/\/ \u5b9a\u4e49\u4e00\u4e2a\u6574\u6570\u7c7b\u578b\u7684\u6ce8\u89e3\u5143\u7d20\uff0c\u5e76\u8bbe\u7f6e\u9ed8\u8ba4\u503c\u4e3a1 } […]<\/p>\n","protected":false},"author":7,"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-17260","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-development","tag-guide","tag-programming","tag-technology","tag-tutorial"],"yoast_head":"\nWhat is the method for creating custom annotations in J... - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn about what is the method for creating custom annotations in java?. 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