{"id":38851,"date":"2024-11-26T16:09:55","date_gmt":"2024-11-26T08:09:55","guid":{"rendered":"https:\/\/fwq.ai\/blog\/38851\/"},"modified":"2024-11-26T16:09:55","modified_gmt":"2024-11-26T08:09:55","slug":"java-%e6%95%b0%e7%bb%84%e4%b8%8d%e7%9f%a5%e9%81%93%e4%b8%aa%e6%95%b0%e6%80%8e%e4%b9%88%e5%ae%9a%e4%b9%89","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/38851\/","title":{"rendered":"Java \u6570\u7ec4\u4e0d\u77e5\u9053\u4e2a\u6570\u600e\u4e48\u5b9a\u4e49"},"content":{"rendered":"

\n \u5982\u4f55\u5728 java \u4e2d\u5b9a\u4e49\u957f\u5ea6\u672a\u77e5\u7684\u6570\u7ec4\uff1f\u4f7f\u7528 arraylist\uff1aarraylist \u662f\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u53ef\u4ee5\u81ea\u52a8\u8c03\u6574\u5176\u5927\u5c0f\u6765\u5bb9\u7eb3\u65b0\u5143\u7d20\u3002\u4f7f\u7528 arrays.copyof\uff1a\u8be5\u65b9\u6cd5\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u73b0\u6709\u6570\u7ec4\u7684\u6307\u5b9a\u90e8\u5206\u3002\u4f7f\u7528 guava \u5e93\uff1a\u8fd9\u662f\u4e00\u4e2a\u7b2c\u4e09\u65b9\u5e93\uff0c\u5b83\u63d0\u4f9b\u4e86\u7528\u4e8e\u521b\u5efa\u957f\u5ea6\u672a\u77e5\u6570\u7ec4\u7684\u66f4\u65b9\u4fbf\u7684\u65b9\u6cd5\u3002\n<\/p><\/blockquote>\n

\"Java<\/p>\n

\u5982\u4f55\u5b9a\u4e49\u957f\u5ea6\u672a\u77e5\u7684 Java \u6570\u7ec4<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u5b9a\u4e49\u957f\u5ea6\u672a\u77e5\u7684\u6570\u7ec4\uff1a<\/p>\n

\u4f7f\u7528 ArrayList<\/strong><\/p>\n

ArrayList \u662f\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u53ef\u4ee5\u81ea\u52a8\u8c03\u6574\u5176\u5927\u5c0f\u6765\u5bb9\u7eb3\u65b0\u5143\u7d20\u3002\u8981\u5b9a\u4e49\u4e00\u4e2a ArrayList\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n

\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n

ArrayList<\u6570\u636e\u7c7b\u578b> \u6570\u7ec4\u540d = new ArrayList<>();<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4f7f\u7528 Arrays.copyOf<\/strong><\/p>\n
Arrays.copyOf() \u65b9\u6cd5\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u73b0\u6709\u6570\u7ec4\u7684\u6307\u5b9a\u90e8\u5206\u3002\u8981\u521b\u5efa\u957f\u5ea6\u672a\u77e5\u7684\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n
\u6570\u7ec4\u540d = Arrays.copyOf(\u73b0\u6709\u6570\u7ec4, \u65b0\u957f\u5ea6);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4f7f\u7528 Guava \u5e93<\/strong><\/p>\n
Guava \u662f\u4e00\u4e2a\u7b2c\u4e09\u65b9\u5e93\uff0c\u5b83\u63d0\u4f9b\u4e86\u7528\u4e8e\u521b\u5efa\u957f\u5ea6\u672a\u77e5\u6570\u7ec4\u7684\u66f4\u65b9\u4fbf\u7684\u65b9\u6cd5\u3002\u8981\u4f7f\u7528 Guava\uff0c\u53ef\u4ee5\u6267\u884c\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n
    \n
  1. \n
    \u5728\u9879\u76ee\u4e2d\u6dfb\u52a0 Guava \u4f9d\u8d56\uff1a<\/p>\n
    <dependency>\n <groupId>com.google.guava<\/groupId>\n <artifactId>guava<\/artifactId>\n <version>31.1-jre<\/version>\n<\/dependency><\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n
  2. \n
    \u4f7f\u7528 Lists.newArrayList \u65b9\u6cd5\u521b\u5efa\u957f\u5ea6\u672a\u77e5\u7684\u6570\u7ec4\uff1a<\/p>\n
    import com.google.common.collect.Lists;\n\n\u6570\u7ec4\u540d = Lists.newArrayList();<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<\/ol>\n
    \u793a\u4f8b<\/strong><\/p>\n
    \u5047\u8bbe\u4f60\u8981\u5b9a\u4e49\u4e00\u4e2a\u5305\u542b\u5b66\u751f\u59d3\u540d\u7684\u6570\u7ec4\uff0c\u4f46\u4e0d\u77e5\u9053\u59d3\u540d\u7684\u6570\u91cf\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n
    \/\/ \u4f7f\u7528 ArrayList\nArrayList<String> \u5b66\u751f\u59d3\u540d = new ArrayList<>();\n\n\/\/ \u4f7f\u7528 Arrays.copyOf\nString[] \u73b0\u6709\u59d3\u540d = {\"\u5f20\u4e09\", \"\u674e\u56db\", \"\u738b\u4e94\"};\nString[] \u5b66\u751f\u59d3\u540d = Arrays.copyOf(\u73b0\u6709\u59d3\u540d, \u73b0\u6709\u59d3\u540d.length + 1);\n\n\/\/ \u4f7f\u7528 Guava\nimport com.google.common.collect.Lists;\nList<String> \u5b66\u751f\u59d3\u540d = Lists.newArrayList();<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u4ee5\u4e0a\u5c31\u662fJava \u6570\u7ec4\u4e0d\u77e5\u9053\u4e2a\u6570\u600e\u4e48\u5b9a\u4e49\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":"
    \u5982\u4f55\u5728 java \u4e2d\u5b9a\u4e49\u957f\u5ea6\u672a\u77e5\u7684\u6570\u7ec4\uff1f\u4f7f\u7528 arraylist\uff1aarraylist \u662f\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u53ef\u4ee5\u81ea\u52a8\u8c03\u6574\u5176\u5927\u5c0f\u6765\u5bb9\u7eb3\u65b0\u5143\u7d20\u3002\u4f7f\u7528 arrays.copyof\uff1a\u8be5\u65b9\u6cd5\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u73b0\u6709\u6570\u7ec4\u7684\u6307\u5b9a\u90e8\u5206\u3002\u4f7f\u7528 guava \u5e93\uff1a\u8fd9\u662f\u4e00\u4e2a\u7b2c\u4e09\u65b9\u5e93\uff0c\u5b83\u63d0\u4f9b\u4e86\u7528\u4e8e\u521b\u5efa\u957f\u5ea6\u672a\u77e5\u6570\u7ec4\u7684\u66f4\u65b9\u4fbf\u7684\u65b9\u6cd5\u3002 \u5982\u4f55\u5b9a\u4e49\u957f\u5ea6\u672a\u77e5\u7684 Java \u6570\u7ec4 \u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u5b9a\u4e49\u957f\u5ea6\u672a\u77e5\u7684\u6570\u7ec4\uff1a \u4f7f\u7528 ArrayList ArrayList \u662f\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u53ef\u4ee5\u81ea\u52a8\u8c03\u6574\u5176\u5927\u5c0f\u6765\u5bb9\u7eb3\u65b0\u5143\u7d20\u3002\u8981\u5b9a\u4e49\u4e00\u4e2a ArrayList\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b ArrayList<\u6570\u636e\u7c7b\u578b> \u6570\u7ec4\u540d = new ArrayList<>(); \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 Arrays.copyOf Arrays.copyOf() \u65b9\u6cd5\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u73b0\u6709\u6570\u7ec4\u7684\u6307\u5b9a\u90e8\u5206\u3002\u8981\u521b\u5efa\u957f\u5ea6\u672a\u77e5\u7684\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a \u6570\u7ec4\u540d = Arrays.copyOf(\u73b0\u6709\u6570\u7ec4, \u65b0\u957f\u5ea6); \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 Guava \u5e93 Guava \u662f\u4e00\u4e2a\u7b2c\u4e09\u65b9\u5e93\uff0c\u5b83\u63d0\u4f9b\u4e86\u7528\u4e8e\u521b\u5efa\u957f\u5ea6\u672a\u77e5\u6570\u7ec4\u7684\u66f4\u65b9\u4fbf\u7684\u65b9\u6cd5\u3002\u8981\u4f7f\u7528 Guava\uff0c\u53ef\u4ee5\u6267\u884c\u4ee5\u4e0b\u6b65\u9aa4\uff1a \u5728\u9879\u76ee\u4e2d\u6dfb\u52a0 Guava \u4f9d\u8d56\uff1a <dependency> <groupId>com.google.guava<\/groupId> <artifactId>guava<\/artifactId> <version>31.1-jre<\/version> <\/dependency> \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 Lists.newArrayList \u65b9\u6cd5\u521b\u5efa\u957f\u5ea6\u672a\u77e5\u7684\u6570\u7ec4\uff1a import com.google.common.collect.Lists; […]<\/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-38851","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38851","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=38851"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38851\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=38851"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=38851"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=38851"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}