{"id":35485,"date":"2024-11-26T14:30:56","date_gmt":"2024-11-26T06:30:56","guid":{"rendered":"https:\/\/fwq.ai\/blog\/35485\/"},"modified":"2024-11-26T14:30:56","modified_gmt":"2024-11-26T06:30:56","slug":"java-%e4%b8%ad%e4%b8%80%e4%b8%aa%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e5%be%aa%e7%8e%af","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/35485\/","title":{"rendered":"java \u4e2d\u4e00\u4e2a\u6570\u7ec4\u600e\u4e48\u5faa\u73af"},"content":{"rendered":"

\n java \u4e2d\u7684\u6570\u7ec4\u5faa\u73af\u53ef\u4ee5\u901a\u8fc7 for \u5faa\u73af\u3001\u589e\u5f3a for \u5faa\u73af\u548c iterator \u904d\u5386\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002\u57fa\u672c for \u5faa\u73af\u904d\u5386\u7d22\u5f15\uff0c\u589e\u5f3a for \u5faa\u73af\u904d\u5386\u5143\u7d20\u672c\u8eab\uff0c\u800c iterator \u5141\u8bb8\u987a\u5e8f\u8bbf\u95ee\u5143\u7d20\u3002\u6b64\u5916\uff0cjava \u8fd8\u63d0\u4f9b\u4e86 foreach() \u5faa\u73af\u548c stream() api \u7b49\u5176\u4ed6\u5faa\u73af\u9009\u9879\u6765\u904d\u5386\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n

\"java<\/p>\n

Java \u4e2d\u6570\u7ec4\u7684\u5faa\u73af<\/strong><\/p>\n

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

Java \u4e2d\u7684\u6570\u7ec4\u662f\u4e00\u79cd\u987a\u5e8f\u5b58\u50a8\u6570\u636e\u7684\u5bb9\u5668\uff0c\u5b83\u5141\u8bb8\u6211\u4eec\u4ee5\u7d22\u5f15\u65b9\u5f0f\u8bbf\u95ee\u6bcf\u4e2a\u5143\u7d20\u3002\u5faa\u73af\u6570\u7ec4\u53ef\u4ee5\u8ba9\u6211\u4eec\u8bbf\u95ee\u548c\u5904\u7406\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u3002<\/p>\n

\u57fa\u672c\u5faa\u73af<\/strong><\/p>\n

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

\u6700\u7b80\u5355\u7684\u6570\u7ec4\u5faa\u73af\u662f\u4f7f\u7528 for \u5faa\u73af\uff1a<\/p>\n

int[] numbers = {1, 2, 3, 4, 5};\n\nfor (int i = 0; i < numbers.length; i++) {\n    \/\/ \u5904\u7406\u6570\u7ec4\u4e2d\u7684\u7b2c i \u4e2a\u5143\u7d20\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5728\u4e0a\u9762\u7684\u5faa\u73af\u4e2d\uff1a<\/p>\n
    \n
  • i \u662f\u5faa\u73af\u53d8\u91cf\uff0c\u8868\u793a\u5f53\u524d\u7d22\u5f15\u3002<\/li>\n
  • numbers.length \u662f\u6570\u7ec4\u7684\u957f\u5ea6\u3002\u5b83\u6307\u5b9a\u4e86\u5faa\u73af\u7684\u7ed3\u675f\u6761\u4ef6\u3002<\/li>\n
  • \u5faa\u73af\u4f53\u5305\u542b\u8981\u5bf9\u6bcf\u4e2a\u5143\u7d20\u6267\u884c\u7684\u4ee3\u7801\u3002<\/li>\n<\/ul>\n
    \u589e\u5f3a for \u5faa\u73af<\/strong><\/p>\n
    Java 5 \u5f15\u5165\u4e86\u589e\u5f3a for \u5faa\u73af\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u66f4\u7b80\u6d01\u7684\u65b9\u5f0f\u6765\u904d\u5386\u6570\u7ec4\uff1a<\/p>\n
    int[] numbers = {1, 2, 3, 4, 5};\n\nfor (int number : numbers) {\n    \/\/ \u5904\u7406\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\n}<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u589e\u5f3a for \u5faa\u73af\u81ea\u52a8\u8fed\u4ee3\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff0c\u5e76\u5c06\u6bcf\u4e2a\u5143\u7d20\u5206\u914d\u7ed9\u5faa\u73af\u53d8\u91cf number\u3002<\/p>\n
    \u4f7f\u7528\u8fed\u4ee3\u5668<\/strong><\/p>\n
    Java \u4e2d\u7684 Iterator \u63a5\u53e3\u63d0\u4f9b\u4e86\u53e6\u4e00\u79cd\u904d\u5386\u6570\u7ec4\u7684\u65b9\u5f0f\u3002\u8fed\u4ee3\u5668\u5141\u8bb8\u6211\u4eec\u5728\u6570\u7ec4\u4e2d\u5411\u524d\u79fb\u52a8\uff0c\u5e76\u83b7\u53d6\u5f53\u524d\u5143\u7d20\uff1a<\/p>\n
    int[] numbers = {1, 2, 3, 4, 5};\n\nIterator<Integer> it = Arrays.asList(numbers).iterator();\n\nwhile (it.hasNext()) {\n    \/\/ \u5904\u7406\u6570\u7ec4\u4e2d\u7684\u4e0b\u4e00\u4e2a\u5143\u7d20\n    it.next();\n}<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff1a<\/p>\n
      \n
    • Arrays.asList(numbers) \u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a\u4e00\u4e2a List\uff0c\u4f7f\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 Iterator\u3002<\/li>\n
    • it.hasNext() \u68c0\u67e5\u662f\u5426\u5b58\u5728\u4e0b\u4e00\u4e2a\u5143\u7d20\u3002<\/li>\n
    • it.next() \u83b7\u53d6\u5e76\u8fd4\u56de\u4e0b\u4e00\u4e2a\u5143\u7d20\u3002<\/li>\n<\/ul>\n
      \u5176\u4ed6\u5faa\u73af\u9009\u9879<\/strong><\/p>\n
      Java \u4e2d\u8fd8\u6709\u5176\u4ed6\u5faa\u73af\u9009\u9879\u53ef\u7528\u4e8e\u904d\u5386\u6570\u7ec4\uff0c\u4f8b\u5982\uff1a<\/p>\n
        \n
      • forEach() \u5faa\u73af\uff08Java 8 \u53ca\u66f4\u9ad8\u7248\u672c\uff09<\/li>\n
      • stream() API\uff08Java 8 \u53ca\u66f4\u9ad8\u7248\u672c\uff09<\/li>\n<\/ul>\n
        \u4ee5\u4e0a\u5c31\u662fjava \u4e2d\u4e00\u4e2a\u6570\u7ec4\u600e\u4e48\u5faa\u73af\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\u6570\u7ec4\u5faa\u73af\u53ef\u4ee5\u901a\u8fc7 for \u5faa\u73af\u3001\u589e\u5f3a for \u5faa\u73af\u548c iterator \u904d\u5386\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002\u57fa\u672c for \u5faa\u73af\u904d\u5386\u7d22\u5f15\uff0c\u589e\u5f3a for \u5faa\u73af\u904d\u5386\u5143\u7d20\u672c\u8eab\uff0c\u800c iterator \u5141\u8bb8\u987a\u5e8f\u8bbf\u95ee\u5143\u7d20\u3002\u6b64\u5916\uff0cjava \u8fd8\u63d0\u4f9b\u4e86 foreach() \u5faa\u73af\u548c stream() api \u7b49\u5176\u4ed6\u5faa\u73af\u9009\u9879\u6765\u904d\u5386\u6570\u7ec4\u3002 Java \u4e2d\u6570\u7ec4\u7684\u5faa\u73af \u6982\u8ff0 Java \u4e2d\u7684\u6570\u7ec4\u662f\u4e00\u79cd\u987a\u5e8f\u5b58\u50a8\u6570\u636e\u7684\u5bb9\u5668\uff0c\u5b83\u5141\u8bb8\u6211\u4eec\u4ee5\u7d22\u5f15\u65b9\u5f0f\u8bbf\u95ee\u6bcf\u4e2a\u5143\u7d20\u3002\u5faa\u73af\u6570\u7ec4\u53ef\u4ee5\u8ba9\u6211\u4eec\u8bbf\u95ee\u548c\u5904\u7406\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u3002 \u57fa\u672c\u5faa\u73af \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u6700\u7b80\u5355\u7684\u6570\u7ec4\u5faa\u73af\u662f\u4f7f\u7528 for \u5faa\u73af\uff1a int[] numbers = {1, 2, 3, 4, 5}; for (int i = 0; i < numbers.length; i++) { \/\/ \u5904\u7406\u6570\u7ec4\u4e2d\u7684\u7b2c i \u4e2a\u5143\u7d20 } \u767b\u5f55\u540e\u590d\u5236 \u5728\u4e0a\u9762\u7684\u5faa\u73af\u4e2d\uff1a […]<\/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-35485","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/35485","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=35485"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/35485\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=35485"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=35485"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=35485"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}