{"id":66170,"date":"2025-05-03T13:14:21","date_gmt":"2025-05-03T05:14:21","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66170\/"},"modified":"2025-05-03T13:14:21","modified_gmt":"2025-05-03T05:14:21","slug":"java%e6%80%8e%e4%b9%88%e8%ae%a9%e6%95%b0%e7%bb%84%e6%9f%90%e4%b8%aa%e5%85%83%e7%b4%a0%e4%b8%ba%e7%a9%ba-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66170\/","title":{"rendered":"java\u600e\u4e48\u8ba9\u6570\u7ec4\u67d0\u4e2a\u5143\u7d20\u4e3a\u7a7a"},"content":{"rendered":"<blockquote><p>\n  \u8981\u8ba9 java \u6570\u7ec4\u4e2d\u7684\u67d0\u4e2a\u5143\u7d20\u4e3a\u7a7a\uff0c\u8bf7\u4f7f\u7528 null \u5173\u952e\u5b57\uff1a\u5bf9\u4e8e\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff1aarray[index] = null;\u5bf9\u4e8e\u5f15\u7528\u7c7b\u578b\u6570\u7ec4\uff1aarray[index] = null;\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/15\/2024111502573917251.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u8ba9\u6570\u7ec4\u67d0\u4e2a\u5143\u7d20\u4e3a\u7a7a\u63d2\u56fe\" alt=\"java\u600e\u4e48\u8ba9\u6570\u7ec4\u67d0\u4e2a\u5143\u7d20\u4e3a\u7a7a\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u8ba9 Java \u6570\u7ec4\u4e2d\u7684\u67d0\u4e2a\u5143\u7d20\u4e3a\u7a7a<\/strong><\/p>\n<p>Java \u6570\u7ec4\u662f\u4e00\u79cd\u56fa\u5b9a\u5927\u5c0f\u7684\u5143\u7d20\u96c6\u5408\uff0c\u5b83\u5b58\u50a8\u76f8\u540c\u6570\u636e\u7c7b\u578b\u7684\u503c\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cJava \u6570\u7ec4\u4f7f\u7528\u9ed8\u8ba4\u503c\u521d\u59cb\u5316\u5143\u7d20\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li> <strong>\u6570\u5b57\u7c7b\u578b\uff1a<\/strong> 0<\/li>\n<li> <strong>\u5e03\u5c14\u7c7b\u578b\uff1a<\/strong> false<\/li>\n<li> <strong>\u5f15\u7528\u7c7b\u578b\uff1a<\/strong> null<\/li>\n<\/ul>\n<p>\u8981\u8ba9\u6570\u7ec4\u4e2d\u7684\u67d0\u4e2a\u5143\u7d20\u4e3a\u7a7a\uff08\u5373\u6307\u5411 null\uff09\uff0c\u53ef\u4ee5\u4f7f\u7528 null \u5173\u952e\u5b57\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u6267\u884c\u6b64\u64cd\u4f5c\uff1a<\/p>\n<pre>\/\/ \u58f0\u660e\u4e00\u4e2a\u6574\u6570\u6570\u7ec4\nint[] numbers = new int[5];\n\n\/\/ \u5c06\u6570\u7ec4\u7684\u7b2c\u4e8c\u4e2a\u5143\u7d20\u8bbe\u4e3a\u7a7a\nnumbers[1] = null;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u73b0\u5728\uff0cnumbers \u6570\u7ec4\u7684\u7b2c\u4e8c\u4e2a\u5143\u7d20\u5c06\u4e3a\u7a7a\uff08\u5373 null\uff09\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4e0d\u80fd\u76f4\u63a5\u5c06\u57fa\u672c\u7c7b\u578b\uff08\u4f8b\u5982 int\uff09\u8bbe\u4e3a\u7a7a\u3002\u5fc5\u987b\u5c06\u5176\u5305\u88c5\u5728 Integer \u7b49\u5305\u88c5\u5668\u7c7b\u4e2d\u624d\u80fd\u8bbe\u4e3a\u7a7a\uff1a<\/p>\n<pre>\/\/ \u58f0\u660e\u4e00\u4e2a Integer \u6570\u7ec4\nInteger[] numbers = new Integer[5];\n\n\/\/ \u5c06\u6570\u7ec4\u7684\u7b2c\u4e8c\u4e2a\u5143\u7d20\u8bbe\u4e3a\u7a7a\nnumbers[1] = null;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4f46\u662f\uff0c\u5bf9\u4e8e\u5f15\u7528\u7c7b\u578b\uff08\u4f8b\u5982 String\uff09\u6570\u7ec4\uff0c\u53ef\u4ee5\u76f4\u63a5\u5c06\u5176\u5143\u7d20\u8bbe\u4e3a\u7a7a\uff1a<\/p>\n<pre>\/\/ \u58f0\u660e\u4e00\u4e2a String \u6570\u7ec4\nString[] names = new String[5];\n\n\/\/ \u5c06\u6570\u7ec4\u7684\u7b2c\u4e8c\u4e2a\u5143\u7d20\u8bbe\u4e3a\u7a7a\nnames[1] = null;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u56e0\u6b64\uff0c\u8981\u8ba9 Java \u6570\u7ec4\u4e2d\u7684\u67d0\u4e2a\u5143\u7d20\u4e3a\u7a7a\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n<ul>\n<li> <strong>\u5bf9\u4e8e\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff1a<\/strong> array[index] = null;<\/li>\n<li> <strong>\u5bf9\u4e8e\u5f15\u7528\u7c7b\u578b\u6570\u7ec4\uff1a<\/strong> array[index] = null;<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u8ba9\u6570\u7ec4\u67d0\u4e2a\u5143\u7d20\u4e3a\u7a7a\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8981\u8ba9 java \u6570\u7ec4\u4e2d\u7684\u67d0\u4e2a\u5143\u7d20\u4e3a\u7a7a\uff0c\u8bf7\u4f7f\u7528 null \u5173\u952e\u5b57\uff1a\u5bf9\u4e8e\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff1aarray[index] = null;\u5bf9\u4e8e\u5f15\u7528\u7c7b\u578b\u6570\u7ec4\uff1aarray[index] = null; \u5982\u4f55\u8ba9 Java \u6570\u7ec4\u4e2d\u7684\u67d0\u4e2a\u5143\u7d20\u4e3a\u7a7a Java \u6570\u7ec4\u662f\u4e00\u79cd\u56fa\u5b9a\u5927\u5c0f\u7684\u5143\u7d20\u96c6\u5408\uff0c\u5b83\u5b58\u50a8\u76f8\u540c\u6570\u636e\u7c7b\u578b\u7684\u503c\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cJava \u6570\u7ec4\u4f7f\u7528\u9ed8\u8ba4\u503c\u521d\u59cb\u5316\u5143\u7d20\uff0c\u4f8b\u5982\uff1a \u6570\u5b57\u7c7b\u578b\uff1a 0 \u5e03\u5c14\u7c7b\u578b\uff1a false \u5f15\u7528\u7c7b\u578b\uff1a null \u8981\u8ba9\u6570\u7ec4\u4e2d\u7684\u67d0\u4e2a\u5143\u7d20\u4e3a\u7a7a\uff08\u5373\u6307\u5411 null\uff09\uff0c\u53ef\u4ee5\u4f7f\u7528 null \u5173\u952e\u5b57\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u6267\u884c\u6b64\u64cd\u4f5c\uff1a \/\/ \u58f0\u660e\u4e00\u4e2a\u6574\u6570\u6570\u7ec4 int[] numbers = new int[5]; \/\/ \u5c06\u6570\u7ec4\u7684\u7b2c\u4e8c\u4e2a\u5143\u7d20\u8bbe\u4e3a\u7a7a numbers[1] = null; \u767b\u5f55\u540e\u590d\u5236 \u73b0\u5728\uff0cnumbers \u6570\u7ec4\u7684\u7b2c\u4e8c\u4e2a\u5143\u7d20\u5c06\u4e3a\u7a7a\uff08\u5373 null\uff09\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4e0d\u80fd\u76f4\u63a5\u5c06\u57fa\u672c\u7c7b\u578b\uff08\u4f8b\u5982 int\uff09\u8bbe\u4e3a\u7a7a\u3002\u5fc5\u987b\u5c06\u5176\u5305\u88c5\u5728 Integer \u7b49\u5305\u88c5\u5668\u7c7b\u4e2d\u624d\u80fd\u8bbe\u4e3a\u7a7a\uff1a \/\/ \u58f0\u660e\u4e00\u4e2a Integer \u6570\u7ec4 Integer[] numbers = new Integer[5]; 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