{"id":37671,"date":"2024-11-26T14:23:10","date_gmt":"2024-11-26T06:23:10","guid":{"rendered":"https:\/\/fwq.ai\/blog\/37671\/"},"modified":"2024-11-26T14:23:10","modified_gmt":"2024-11-26T06:23:10","slug":"byte%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e5%ad%98%e5%80%bcjava","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/37671\/","title":{"rendered":"byte\u6570\u7ec4\u600e\u4e48\u5b58\u503cjava"},"content":{"rendered":"

\n java \u4e2d\u7684 byte \u6570\u7ec4\u7528\u4e8e\u5b58\u50a8\u539f\u59cb\u5b57\u8282\u6570\u636e\uff0c\u4e0b\u6807\u4ece 0 \u5f00\u59cb\u3002\u5b58\u503c\u53ef\u901a\u8fc7\u76f4\u63a5\u8d4b\u503c\u6216\u4f7f\u7528 arraycopy \u65b9\u6cd5\u8fdb\u884c\u3002\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a\u76f4\u63a5\u8d4b\u503c\uff1a\u58f0\u660e\u5e76\u521d\u59cb\u5316\u4e00\u4e2a\u6570\u7ec4\uff0c\u5982 byte[] array = {0, 1, 2, 3, 4}\u3002arraycopy \u65b9\u6cd5\uff1a\u4f7f\u7528 system.arraycopy(source, sourceindex, dest, destindex, length) \u5c06\u53e6\u4e00\u4e2a\u6570\u7ec4\u7684\u6570\u636e\u590d\u5236\u5230\u76ee\u6807\u6570\u7ec4\u4e2d\u3002\n<\/p><\/blockquote>\n

\"byte\u6570\u7ec4\u600e\u4e48\u5b58\u503cjava\u63d2\u56fe\"<\/p>\n

Java \u4e2d byte \u6570\u7ec4\u7684\u5b58\u503c<\/strong><\/p>\n

\u6982\u8ff0<\/strong><\/p>\n

Java \u4e2d\u7684 byte \u6570\u7ec4\u662f\u4e00\u79cd\u7528\u4e8e\u5b58\u50a8\u539f\u59cb\u5b57\u8282\u6570\u636e\u7684\u5bb9\u5668\uff0c\u5176\u4e0b\u6807\u4ece 0 \u5f00\u59cb\u3002\u53ef\u4ee5\u9010\u4e2a\u5143\u7d20\u5730\u5b58\u53d6\u6570\u7ec4\u4e2d\u7684\u6570\u636e\u3002<\/p>\n

\u5b58\u503c<\/strong><\/p>\n

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

\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\u5728 byte \u6570\u7ec4\u4e2d\u5b58\u503c\uff1a<\/p>\n

    \n
  1. \n

    \u76f4\u63a5\u8d4b\u503c\uff1a<\/strong><\/p>\n

    \/\/ \u58f0\u660e\u5e76\u521d\u59cb\u5316\u4e00\u4e2a byte \u6570\u7ec4\nbyte[] array = {0, 1, 2, 3, 4};<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n
  2. \n
    \u4f7f\u7528 arraycopy \u65b9\u6cd5\uff1a<\/strong><\/p>\n
    \/\/ \u53e6\u4e00\u4e2a byte \u6570\u7ec4\nbyte[] source = {5, 6, 7, 8, 9};\n\n\/\/ \u5c06 source \u6570\u7ec4\u590d\u5236\u5230 array \u6570\u7ec4\u4e2d\nSystem.arraycopy(source, 0, array, 2, 3);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<\/ol>\n
    \u8fd4\u56de\u7ed3\u679c<\/strong><\/p>\n
    \u4e0a\u8ff0\u4ee3\u7801\u6267\u884c\u540e\uff0carray \u6570\u7ec4\u5305\u542b\u4ee5\u4e0b\u6570\u636e\uff1a<\/p>\n
    [0, 1, 5, 6, 7, 3, 4]<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u6ce8\u610f\u4e8b\u9879<\/strong><\/p>\n
      \n
    • \u786e\u4fdd\u5728\u5b58\u503c\u524d\u521d\u59cb\u5316\u6570\u7ec4\uff0c\u5426\u5219\u4f1a\u5bfc\u81f4 NullPointerException\u3002<\/li>\n
    • \n
      arraycopy \u65b9\u6cd5\u7684\u8bed\u6cd5\u4e3a\uff1aarraycopy(source, sourceIndex, dest, destIndex, length)\uff0c\u5176\u4e2d\uff1a<\/p>\n
        \n
      • source\uff1a\u9700\u8981\u590d\u5236\u7684\u6570\u7ec4<\/li>\n
      • sourceIndex\uff1asource \u6570\u7ec4\u4e2d\u5f00\u59cb\u590d\u5236\u7684\u7d22\u5f15<\/li>\n
      • dest\uff1a\u76ee\u6807\u6570\u7ec4<\/li>\n
      • destIndex\uff1adest \u6570\u7ec4\u4e2d\u5f00\u59cb\u653e\u7f6e\u590d\u5236\u6570\u636e\u7684\u7d22\u5f15<\/li>\n
      • length\uff1a\u9700\u8981\u590d\u5236\u7684\u5143\u7d20\u6570\u91cf<\/li>\n<\/ul>\n<\/li>\n
      • \u5982\u679c destIndex + length \u5927\u4e8e dest \u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u5c06\u629b\u51fa IndexOutOfBoundsException\u3002<\/li>\n<\/ul>\n
        \u4ee5\u4e0a\u5c31\u662fbyte\u6570\u7ec4\u600e\u4e48\u5b58\u503cjava\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 \u4e2d\u7684 byte \u6570\u7ec4\u7528\u4e8e\u5b58\u50a8\u539f\u59cb\u5b57\u8282\u6570\u636e\uff0c\u4e0b\u6807\u4ece 0 \u5f00\u59cb\u3002\u5b58\u503c\u53ef\u901a\u8fc7\u76f4\u63a5\u8d4b\u503c\u6216\u4f7f\u7528 arraycopy \u65b9\u6cd5\u8fdb\u884c\u3002\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a\u76f4\u63a5\u8d4b\u503c\uff1a\u58f0\u660e\u5e76\u521d\u59cb\u5316\u4e00\u4e2a\u6570\u7ec4\uff0c\u5982 byte[] array = {0, 1, 2, 3, 4}\u3002arraycopy \u65b9\u6cd5\uff1a\u4f7f\u7528 system.arraycopy(source, sourceindex, dest, destindex, length) \u5c06\u53e6\u4e00\u4e2a\u6570\u7ec4\u7684\u6570\u636e\u590d\u5236\u5230\u76ee\u6807\u6570\u7ec4\u4e2d\u3002 Java \u4e2d byte \u6570\u7ec4\u7684\u5b58\u503c \u6982\u8ff0 Java \u4e2d\u7684 byte \u6570\u7ec4\u662f\u4e00\u79cd\u7528\u4e8e\u5b58\u50a8\u539f\u59cb\u5b57\u8282\u6570\u636e\u7684\u5bb9\u5668\uff0c\u5176\u4e0b\u6807\u4ece 0 \u5f00\u59cb\u3002\u53ef\u4ee5\u9010\u4e2a\u5143\u7d20\u5730\u5b58\u53d6\u6570\u7ec4\u4e2d\u7684\u6570\u636e\u3002 \u5b58\u503c \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\u5728 byte \u6570\u7ec4\u4e2d\u5b58\u503c\uff1a \u76f4\u63a5\u8d4b\u503c\uff1a \/\/ \u58f0\u660e\u5e76\u521d\u59cb\u5316\u4e00\u4e2a byte \u6570\u7ec4 byte[] array = {0, 1, 2, 3, 4}; \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 arraycopy […]<\/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-37671","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37671","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=37671"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37671\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=37671"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=37671"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=37671"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}