{"id":39575,"date":"2024-11-26T11:53:15","date_gmt":"2024-11-26T03:53:15","guid":{"rendered":"https:\/\/fwq.ai\/blog\/39575\/"},"modified":"2024-11-26T11:53:15","modified_gmt":"2024-11-26T03:53:15","slug":"java%e5%af%b9%e8%b1%a1%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e6%94%b9%e5%8f%98%e9%95%bf%e5%ba%a6","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/39575\/","title":{"rendered":"java\u5bf9\u8c61\u6570\u7ec4\u600e\u4e48\u6539\u53d8\u957f\u5ea6"},"content":{"rendered":"

\n java \u5bf9\u8c61\u6570\u7ec4\u521b\u5efa\u540e\u957f\u5ea6\u4e0d\u53ef\u53d8\uff0c\u53ef\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u6539\u53d8\u957f\u5ea6\uff1a\u4f7f\u7528 collections.arrays.aslist() \u8f6c\u6362\u4e3a\u53ef\u53d8\u5927\u5c0f arraylist\u3002\u4f7f\u7528 system.arraycopy() \u5c06\u4e00\u90e8\u5206\u590d\u5236\u5230\u65b0\u6570\u7ec4\uff0c\u5e76\u8bbe\u7f6e\u65b0\u6570\u7ec4\u6240\u9700\u7684\u957f\u5ea6\u3002\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\uff08\u5982 javassist\u3001byte buddy\u3001asm\uff09\u63d0\u4f9b\u53ef\u53d8\u5927\u5c0f\u7684\u5bf9\u8c61\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n

\"java\u5bf9\u8c61\u6570\u7ec4\u600e\u4e48\u6539\u53d8\u957f\u5ea6\u63d2\u56fe\"<\/p>\n

\u6539\u53d8 Java \u5bf9\u8c61\u6570\u7ec4\u957f\u5ea6<\/strong><\/p>\n

Java \u5bf9\u8c61\u6570\u7ec4\u5728\u521b\u5efa\u540e\u5176\u957f\u5ea6\u56fa\u5b9a\u4e0d\u53d8\u3002\u7136\u800c\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u6765\u6539\u53d8\u5176\u957f\u5ea6\uff1a<\/p>\n

\u4f7f\u7528 Collections.Arrays.asList() \u65b9\u6cd5<\/strong><\/p>\n

\u8be5\u65b9\u6cd5\u5c06\u5bf9\u8c61\u6570\u7ec4\u8f6c\u6362\u4e3a\u4e00\u4e2a\u53ef\u53d8\u5927\u5c0f\u7684 ArrayList\u3002<\/p>\n

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

\u793a\u4f8b\uff1a<\/strong><\/p>\n

Object[] array = {1, 2, 3};\nList<Object> list = Arrays.asList(array);\nlist.add(4); \/\/ \u6dfb\u52a0\u5143\u7d20\nlist.remove(0); \/\/ \u79fb\u9664\u5143\u7d20<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4f7f\u7528 System.arraycopy() \u65b9\u6cd5<\/strong><\/p>\n
\u8be5\u65b9\u6cd5\u5c06\u5bf9\u8c61\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u65b0\u6570\u7ec4\u3002\u53ef\u4ee5\u901a\u8fc7\u5c06\u65b0\u6570\u7ec4\u7684\u957f\u5ea6\u8bbe\u7f6e\u4e3a\u6240\u9700\u7684\u65b0\u957f\u5ea6\u6765\u6539\u53d8\u957f\u5ea6\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/strong><\/p>\n
Object[] array = {1, 2, 3};\nObject[] newArray = new Object[5]; \/\/ \u65b0\u6570\u7ec4\u957f\u5ea6\u4e3a 5\nSystem.arraycopy(array, 0, newArray, 0, array.length);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93<\/strong><\/p>\n
\u6709\u8bb8\u591a\u7b2c\u4e09\u65b9\u5e93\u63d0\u4f9b\u4e86\u53ef\u53d8\u5927\u5c0f\u7684\u5bf9\u8c61\u6570\u7ec4\u3002\u5176\u4e2d\u4e00\u4e9b\u5e93\u5305\u62ec\uff1a<\/p>\n
    \n
  • Javassist<\/li>\n
  • Byte Buddy<\/li>\n
  • ASM<\/li>\n<\/ul>\n
    \u6ce8\u610f\u4e8b\u9879\uff1a<\/strong><\/p>\n
      \n
    • \u6539\u53d8\u5bf9\u8c61\u6570\u7ec4\u957f\u5ea6\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5e95\u5c42\u6570\u636e\u7ed3\u6784\u53d1\u751f\u53d8\u5316\u3002<\/li>\n
    • \u6539\u53d8\u957f\u5ea6\u540e\uff0c\u539f\u6709\u6570\u7ec4\u7684\u5f15\u7528\u4ecd\u7136\u6307\u5411\u65e7\u6570\u636e\u7ed3\u6784\u3002<\/li>\n
    • \u5efa\u8bae\u8c28\u614e\u4f7f\u7528\u8fd9\u79cd\u65b9\u6cd5\uff0c\u56e0\u4e3a\u5b83\u53ef\u80fd\u4f1a\u5e26\u6765\u5e76\u53d1\u95ee\u9898\u6216\u5176\u4ed6\u4e0d\u53ef\u9884\u6599\u7684\u884c\u4e3a\u3002<\/li>\n<\/ul>\n
      \u4ee5\u4e0a\u5c31\u662fjava\u5bf9\u8c61\u6570\u7ec4\u600e\u4e48\u6539\u53d8\u957f\u5ea6\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":"
      java \u5bf9\u8c61\u6570\u7ec4\u521b\u5efa\u540e\u957f\u5ea6\u4e0d\u53ef\u53d8\uff0c\u53ef\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u6539\u53d8\u957f\u5ea6\uff1a\u4f7f\u7528 collections.arrays.aslist() \u8f6c\u6362\u4e3a\u53ef\u53d8\u5927\u5c0f arraylist\u3002\u4f7f\u7528 system.arraycopy() \u5c06\u4e00\u90e8\u5206\u590d\u5236\u5230\u65b0\u6570\u7ec4\uff0c\u5e76\u8bbe\u7f6e\u65b0\u6570\u7ec4\u6240\u9700\u7684\u957f\u5ea6\u3002\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\uff08\u5982 javassist\u3001byte buddy\u3001asm\uff09\u63d0\u4f9b\u53ef\u53d8\u5927\u5c0f\u7684\u5bf9\u8c61\u6570\u7ec4\u3002 \u6539\u53d8 Java \u5bf9\u8c61\u6570\u7ec4\u957f\u5ea6 Java \u5bf9\u8c61\u6570\u7ec4\u5728\u521b\u5efa\u540e\u5176\u957f\u5ea6\u56fa\u5b9a\u4e0d\u53d8\u3002\u7136\u800c\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u6765\u6539\u53d8\u5176\u957f\u5ea6\uff1a \u4f7f\u7528 Collections.Arrays.asList() \u65b9\u6cd5 \u8be5\u65b9\u6cd5\u5c06\u5bf9\u8c61\u6570\u7ec4\u8f6c\u6362\u4e3a\u4e00\u4e2a\u53ef\u53d8\u5927\u5c0f\u7684 ArrayList\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u793a\u4f8b\uff1a Object[] array = {1, 2, 3}; List<Object> list = Arrays.asList(array); list.add(4); \/\/ \u6dfb\u52a0\u5143\u7d20 list.remove(0); \/\/ \u79fb\u9664\u5143\u7d20 \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 System.arraycopy() \u65b9\u6cd5 \u8be5\u65b9\u6cd5\u5c06\u5bf9\u8c61\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u65b0\u6570\u7ec4\u3002\u53ef\u4ee5\u901a\u8fc7\u5c06\u65b0\u6570\u7ec4\u7684\u957f\u5ea6\u8bbe\u7f6e\u4e3a\u6240\u9700\u7684\u65b0\u957f\u5ea6\u6765\u6539\u53d8\u957f\u5ea6\u3002 \u793a\u4f8b\uff1a Object[] array = {1, 2, 3}; Object[] newArray = new Object[5]; \/\/ […]<\/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-39575","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39575","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=39575"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39575\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=39575"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=39575"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=39575"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}