{"id":65613,"date":"2025-05-03T09:54:43","date_gmt":"2025-05-03T01:54:43","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65613\/"},"modified":"2025-05-03T09:54:43","modified_gmt":"2025-05-03T01:54:43","slug":"java%e6%80%8e%e4%b9%88%e5%88%a4%e6%96%adobject%e4%b8%ba%e6%95%b0%e7%bb%84-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65613\/","title":{"rendered":"java\u600e\u4e48\u5224\u65adobject\u4e3a\u6570\u7ec4"},"content":{"rendered":"

\n java \u4e2d\u5224\u65ad object \u662f\u5426\u4e3a\u6570\u7ec4\u7684\u65b9\u5f0f\u6709\u4e09\u79cd\uff1a\u4f7f\u7528 instanceof \u8fd0\u7b97\u7b26\uff1aobject instanceof []\u4f7f\u7528 getclass().isarray() \u65b9\u6cd5\uff1aobj.getclass().isarray()\u4f7f\u7528\u7c7b\u578b\u68c0\u67e5\uff1aobj.getclass() == .class\n<\/p><\/blockquote>\n

\"java\u600e\u4e48\u5224\u65adobject\u4e3a\u6570\u7ec4\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u5224\u65ad Java \u4e2d\u7684 Object \u4e3a\u6570\u7ec4<\/strong><\/p>\n

Java \u4e2d\u5224\u65ad\u4e00\u4e2a Object \u662f\u5426\u4e3a\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528 instanceof<\/strong> \u8fd0\u7b97\u7b26\u3002instanceof \u8fd0\u7b97\u7b26\u68c0\u67e5\u5bf9\u8c61\u662f\u5426\u4e3a\u6307\u5b9a\u7c7b\u7684\u5b9e\u4f8b\u6216\u5176\u5b50\u7c7b\u7684\u5b9e\u4f8b\u3002\u5bf9\u4e8e\u6570\u7ec4\uff0c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

object instanceof <array_type>[]<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5176\u4e2d\uff1a<\/p>\n
    \n
  •  object<\/strong>\uff1a\u8981\u68c0\u67e5\u7684\u5bf9\u8c61<\/li>\n
  •   [] <\/strong>\uff1a\u6570\u7ec4\u7c7b\u578b\u7684\u540d\u79f0\uff0c\u4f8b\u5982 String[]\u3001int[] \u6216 Object[]<\/li>\n<\/ul>\n
    \u4f8b\u5982\uff0c\u8981\u68c0\u67e5\u5bf9\u8c61 obj \u662f\u5426\u4e3a\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
    \u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
    if (obj instanceof String[]) {\n    \/\/ obj \u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4\n} else {\n    \/\/ obj \u4e0d\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4\n}<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u5176\u4ed6\u65b9\u6cd5<\/strong><\/p>\n
    \u9664\u4e86 instanceof \u8fd0\u7b97\u7b26\u4e4b\u5916\uff0c\u8fd8\u6709\u5176\u4ed6\u65b9\u6cd5\u53ef\u4ee5\u5224\u65ad Object \u662f\u5426\u4e3a\u6570\u7ec4\uff1a<\/p>\n
      \n
    •  getClass().isArray()\uff1a<\/strong> \u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\uff0c\u6307\u793a\u5bf9\u8c61\u662f\u5426\u4e3a\u6570\u7ec4\u3002<\/li>\n
    •  \u7c7b\u578b\u68c0\u67e5\uff1a<\/strong> \u4f7f\u7528 if (obj.getClass().equals(String[].class)) \u6216 if (obj.getClass() == String[].class) \u76f4\u63a5\u6bd4\u8f83\u5bf9\u8c61\u7684\u7c7b\u578b\u3002<\/li>\n<\/ul>\n
      \u793a\u4f8b\u4ee3\u7801<\/strong><\/p>\n
      \u4ee5\u4e0b\u4ee3\u7801\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u8fd9\u4e9b\u65b9\u6cd5\u5224\u65ad Object \u662f\u5426\u4e3a\u6570\u7ec4\uff1a<\/p>\n
      Object obj = new String[] { \"A\", \"B\", \"C\" };\n\n\/\/ \u4f7f\u7528 instanceof \u8fd0\u7b97\u7b26\nif (obj instanceof String[]) {\n    System.out.println(\"obj \u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4\");\n}\n\n\/\/ \u4f7f\u7528 getClass().isArray() \u65b9\u6cd5\nif (obj.getClass().isArray()) {\n    System.out.println(\"obj \u662f\u4e00\u4e2a\u6570\u7ec4\");\n}\n\n\/\/ \u4f7f\u7528\u7c7b\u578b\u68c0\u67e5\nif (obj.getClass() == String[].class) {\n    System.out.println(\"obj \u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4\");\n}<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u5224\u65adobject\u4e3a\u6570\u7ec4\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      java \u4e2d\u5224\u65ad object \u662f\u5426\u4e3a\u6570\u7ec4\u7684\u65b9\u5f0f\u6709\u4e09\u79cd\uff1a\u4f7f\u7528 instanceof \u8fd0\u7b97\u7b26\uff1aobject instanceof []\u4f7f\u7528 getclass().isarray() \u65b9\u6cd5\uff1aobj.getclass().isarray()\u4f7f\u7528\u7c7b\u578b\u68c0\u67e5\uff1aobj.getclass() == .class \u5982\u4f55\u5224\u65ad Java \u4e2d\u7684 Object \u4e3a\u6570\u7ec4 Java \u4e2d\u5224\u65ad\u4e00\u4e2a Object \u662f\u5426\u4e3a\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528 instanceof \u8fd0\u7b97\u7b26\u3002instanceof \u8fd0\u7b97\u7b26\u68c0\u67e5\u5bf9\u8c61\u662f\u5426\u4e3a\u6307\u5b9a\u7c7b\u7684\u5b9e\u4f8b\u6216\u5176\u5b50\u7c7b\u7684\u5b9e\u4f8b\u3002\u5bf9\u4e8e\u6570\u7ec4\uff0c\u8bed\u6cd5\u5982\u4e0b\uff1a object instanceof <array_type>[] \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d\uff1a object\uff1a\u8981\u68c0\u67e5\u7684\u5bf9\u8c61 [] \uff1a\u6570\u7ec4\u7c7b\u578b\u7684\u540d\u79f0\uff0c\u4f8b\u5982 String[]\u3001int[] \u6216 Object[] \u4f8b\u5982\uff0c\u8981\u68c0\u67e5\u5bf9\u8c61 obj \u662f\u5426\u4e3a\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b if (obj instanceof String[]) { \/\/ obj \u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4 } else { \/\/ obj \u4e0d\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4 } \u767b\u5f55\u540e\u590d\u5236 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-65613","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65613","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=65613"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65613\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65613"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65613"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65613"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}