{"id":40026,"date":"2024-11-26T10:27:35","date_gmt":"2024-11-26T02:27:35","guid":{"rendered":"https:\/\/fwq.ai\/blog\/40026\/"},"modified":"2024-11-26T10:27:35","modified_gmt":"2024-11-26T02:27:35","slug":"java%e6%95%b0%e7%bb%84%e4%b8%8d%e5%88%9d%e5%a7%8b%e5%8c%96%e4%bc%9a%e6%80%8e%e4%b9%88%e6%a0%b7","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/40026\/","title":{"rendered":"java\u6570\u7ec4\u4e0d\u521d\u59cb\u5316\u4f1a\u600e\u4e48\u6837"},"content":{"rendered":"<blockquote><p>\n  java \u6570\u7ec4\u672a\u521d\u59cb\u5316\u4f1a\u4ea7\u751f\u4ee5\u4e0b\u5f71\u54cd\uff1a1. \u5143\u7d20\u83b7\u5f97\u9ed8\u8ba4\u503c\uff1a\u6570\u5b57\u4e3a 0\uff0c\u5e03\u5c14\u4e3a false\uff0c\u5b57\u7b26\u4e3a\u7a7a\u5b57\u7b26\uff0c\u5f15\u7528\u4e3a null\uff1b2. \u5360\u7528\u5185\u5b58\u4f46\u65e0\u610f\u4e49\u6570\u636e\uff0c\u589e\u52a0\u5783\u573e\u56de\u6536\u5f00\u9500\uff1b3. \u5bfc\u81f4\u610f\u5916\u7ed3\u679c\uff0c\u5982\u8d8a\u754c\u9519\u8bef\u548c\u7a7a\u6307\u9488\u5f02\u5e38\uff1b4. \u964d\u4f4e\u4ee3\u7801\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u5efa\u8bae\u5728\u4f7f\u7528\u524d\u521d\u59cb\u5316\u6570\u7ec4\uff0c\u53ef\u901a\u8fc7\u58f0\u660e\u65f6\u521d\u59cb\u5316\u3001\u4f7f\u7528 arrays.fill \u65b9\u6cd5\u586b\u5145\u6216\u4f7f\u7528\u5faa\u73af\u9010\u4e2a\u521d\u59cb\u5316\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/17\/2024111718462967722.jpg\" class=\"aligncenter\" title=\"java\u6570\u7ec4\u4e0d\u521d\u59cb\u5316\u4f1a\u600e\u4e48\u6837\u63d2\u56fe\" alt=\"java\u6570\u7ec4\u4e0d\u521d\u59cb\u5316\u4f1a\u600e\u4e48\u6837\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u6570\u7ec4\u4e0d\u521d\u59cb\u5316\u7684\u540e\u679c<\/strong><\/p>\n<p>Java \u4e2d\u7684\u6570\u7ec4\u5982\u679c\u4e0d\u521d\u59cb\u5316\uff0c\u4f1a\u4ea7\u751f\u4e00\u4e9b\u5f71\u54cd\uff1a<\/p>\n<p><strong>1. \u9ed8\u8ba4\u503c<\/strong><\/p>\n<p>\u4e0d\u521d\u59cb\u5316\u7684\u6570\u7ec4\u5143\u7d20\u4f1a\u6839\u636e\u5143\u7d20\u7c7b\u578b\u83b7\u5f97\u9ed8\u8ba4\u503c\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<ul>\n<li>\u6570\u5b57\u7c7b\u578b\uff08int\u3001long\u3001float\u3001double\uff09\uff1a0<\/li>\n<li>\u5e03\u5c14\u7c7b\u578b\uff08boolean\uff09\uff1afalse<\/li>\n<li>\u5b57\u7b26\u7c7b\u578b\uff08char\uff09\uff1a&#8217;u0000&#8217;\uff08\u7a7a\u5b57\u7b26\uff09<\/li>\n<li>\u5f15\u7528\u7c7b\u578b\uff08\u4f8b\u5982\u5bf9\u8c61\u3001\u6570\u7ec4\uff09\uff1anull<\/li>\n<\/ul>\n<p><strong>2. \u5783\u573e\u56de\u6536<\/strong><\/p>\n<p>\u672a\u521d\u59cb\u5316\u7684\u6570\u7ec4\u5143\u7d20\u4f1a\u5360\u7528\u5185\u5b58\uff0c\u4f46\u4e0d\u4f1a\u5b58\u50a8\u4efb\u4f55\u6709\u610f\u4e49\u7684\u6570\u636e\u3002\u8fd9\u53ef\u80fd\u5bfc\u81f4\u5185\u5b58\u6d6a\u8d39\u548c\u5783\u573e\u56de\u6536\u5f00\u9500\u589e\u52a0\u3002<\/p>\n<p><strong>3. \u610f\u5916\u7ed3\u679c<\/strong><\/p>\n<p>\u4f7f\u7528\u672a\u521d\u59cb\u5316\u7684\u6570\u7ec4\u5143\u7d20\u4f1a\u5bfc\u81f4\u610f\u5916\u7ed3\u679c\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u9519\u8bef<\/li>\n<li>NullPointerException<\/li>\n<li>\u7c7b\u578b\u8f6c\u6362\u5f02\u5e38<\/li>\n<\/ul>\n<p><strong>4. \u548c\u53ef\u7ef4\u62a4\u6027<\/strong><\/p>\n<p>\u4e0d\u521d\u59cb\u5316\u7684\u6570\u7ec4\u4f1a\u4f7f\u4ee3\u7801\u96be\u4ee5\u7406\u89e3\u548c\u7ef4\u62a4\uff0c\u56e0\u4e3a\u5b83\u53ef\u80fd\u4e0d\u6e05\u695a\u5143\u7d20\u7684\u503c\u5982\u4f55\u786e\u5b9a\u3002<\/p>\n<p>\u4e3a\u4e86\u907f\u514d\u8fd9\u4e9b\u95ee\u9898\uff0c\u5efa\u8bae\u5728\u4f7f\u7528\u4e4b\u524d\u5bf9\u6570\u7ec4\u8fdb\u884c\u521d\u59cb\u5316\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u4e4b\u4e00\u5b8c\u6210\uff1a<\/p>\n<ul>\n<li>\u5728\u58f0\u660e\u6570\u7ec4\u65f6\u76f4\u63a5\u521d\u59cb\u5316\u5b83\uff1aint[] myArray = {1, 2, 3};<\/li>\n<li>\u4f7f\u7528 Arrays.fill \u65b9\u6cd5\u586b\u5145\u6570\u7ec4\uff1aArrays.fill(myArray, 0);<\/li>\n<li>\u4f7f\u7528\u5faa\u73af\u4e00\u4e2a\u4e00\u4e2a\u5730\u521d\u59cb\u5316\u5143\u7d20\uff1afor (int i = 0; i <\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u4e0d\u521d\u59cb\u5316\u4f1a\u600e\u4e48\u6837\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>java \u6570\u7ec4\u672a\u521d\u59cb\u5316\u4f1a\u4ea7\u751f\u4ee5\u4e0b\u5f71\u54cd\uff1a1. \u5143\u7d20\u83b7\u5f97\u9ed8\u8ba4\u503c\uff1a\u6570\u5b57\u4e3a 0\uff0c\u5e03\u5c14\u4e3a false\uff0c\u5b57\u7b26\u4e3a\u7a7a\u5b57\u7b26\uff0c\u5f15\u7528\u4e3a null\uff1b2. \u5360\u7528\u5185\u5b58\u4f46\u65e0\u610f\u4e49\u6570\u636e\uff0c\u589e\u52a0\u5783\u573e\u56de\u6536\u5f00\u9500\uff1b3. \u5bfc\u81f4\u610f\u5916\u7ed3\u679c\uff0c\u5982\u8d8a\u754c\u9519\u8bef\u548c\u7a7a\u6307\u9488\u5f02\u5e38\uff1b4. \u964d\u4f4e\u4ee3\u7801\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u5efa\u8bae\u5728\u4f7f\u7528\u524d\u521d\u59cb\u5316\u6570\u7ec4\uff0c\u53ef\u901a\u8fc7\u58f0\u660e\u65f6\u521d\u59cb\u5316\u3001\u4f7f\u7528 arrays.fill \u65b9\u6cd5\u586b\u5145\u6216\u4f7f\u7528\u5faa\u73af\u9010\u4e2a\u521d\u59cb\u5316\u3002 Java \u6570\u7ec4\u4e0d\u521d\u59cb\u5316\u7684\u540e\u679c Java \u4e2d\u7684\u6570\u7ec4\u5982\u679c\u4e0d\u521d\u59cb\u5316\uff0c\u4f1a\u4ea7\u751f\u4e00\u4e9b\u5f71\u54cd\uff1a 1. \u9ed8\u8ba4\u503c \u4e0d\u521d\u59cb\u5316\u7684\u6570\u7ec4\u5143\u7d20\u4f1a\u6839\u636e\u5143\u7d20\u7c7b\u578b\u83b7\u5f97\u9ed8\u8ba4\u503c\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u6570\u5b57\u7c7b\u578b\uff08int\u3001long\u3001float\u3001double\uff09\uff1a0 \u5e03\u5c14\u7c7b\u578b\uff08boolean\uff09\uff1afalse \u5b57\u7b26\u7c7b\u578b\uff08char\uff09\uff1a&#8217;u0000&#8217;\uff08\u7a7a\u5b57\u7b26\uff09 \u5f15\u7528\u7c7b\u578b\uff08\u4f8b\u5982\u5bf9\u8c61\u3001\u6570\u7ec4\uff09\uff1anull 2. \u5783\u573e\u56de\u6536 \u672a\u521d\u59cb\u5316\u7684\u6570\u7ec4\u5143\u7d20\u4f1a\u5360\u7528\u5185\u5b58\uff0c\u4f46\u4e0d\u4f1a\u5b58\u50a8\u4efb\u4f55\u6709\u610f\u4e49\u7684\u6570\u636e\u3002\u8fd9\u53ef\u80fd\u5bfc\u81f4\u5185\u5b58\u6d6a\u8d39\u548c\u5783\u573e\u56de\u6536\u5f00\u9500\u589e\u52a0\u3002 3. \u610f\u5916\u7ed3\u679c \u4f7f\u7528\u672a\u521d\u59cb\u5316\u7684\u6570\u7ec4\u5143\u7d20\u4f1a\u5bfc\u81f4\u610f\u5916\u7ed3\u679c\uff0c\u4f8b\u5982\uff1a \u6570\u7ec4\u4e0b\u6807\u8d8a\u754c\u9519\u8bef NullPointerException \u7c7b\u578b\u8f6c\u6362\u5f02\u5e38 4. \u548c\u53ef\u7ef4\u62a4\u6027 \u4e0d\u521d\u59cb\u5316\u7684\u6570\u7ec4\u4f1a\u4f7f\u4ee3\u7801\u96be\u4ee5\u7406\u89e3\u548c\u7ef4\u62a4\uff0c\u56e0\u4e3a\u5b83\u53ef\u80fd\u4e0d\u6e05\u695a\u5143\u7d20\u7684\u503c\u5982\u4f55\u786e\u5b9a\u3002 \u4e3a\u4e86\u907f\u514d\u8fd9\u4e9b\u95ee\u9898\uff0c\u5efa\u8bae\u5728\u4f7f\u7528\u4e4b\u524d\u5bf9\u6570\u7ec4\u8fdb\u884c\u521d\u59cb\u5316\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u4e4b\u4e00\u5b8c\u6210\uff1a \u5728\u58f0\u660e\u6570\u7ec4\u65f6\u76f4\u63a5\u521d\u59cb\u5316\u5b83\uff1aint[] myArray = {1, 2, 3}; \u4f7f\u7528 Arrays.fill \u65b9\u6cd5\u586b\u5145\u6570\u7ec4\uff1aArrays.fill(myArray, 0); \u4f7f\u7528\u5faa\u73af\u4e00\u4e2a\u4e00\u4e2a\u5730\u521d\u59cb\u5316\u5143\u7d20\uff1afor (int i = 0; i \u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u4e0d\u521d\u59cb\u5316\u4f1a\u600e\u4e48\u6837\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/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-40026","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/40026","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=40026"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/40026\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=40026"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=40026"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=40026"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}