{"id":36727,"date":"2024-11-26T11:19:42","date_gmt":"2024-11-26T03:19:42","guid":{"rendered":"https:\/\/fwq.ai\/blog\/36727\/"},"modified":"2024-11-26T11:19:42","modified_gmt":"2024-11-26T03:19:42","slug":"java%e6%80%8e%e4%b9%88%e6%95%b0%e7%bb%84%e4%be%bf%e5%88%a9","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/36727\/","title":{"rendered":"java\u600e\u4e48\u6570\u7ec4\u4fbf\u5229"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u904d\u5386\u6570\u7ec4\u6709 4 \u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a\u589e\u5f3a\u578b for \u5faa\u73af\u3001\u4f20\u7edf for \u5faa\u73af\u3001arrays.tostring() \u65b9\u6cd5\u548c stream api\u3002\u589e\u5f3a\u578b for \u5faa\u73af\u4f7f\u7528 foreach \u8bed\u6cd5\uff0c\u4f20\u7edf for \u5faa\u73af\u6309\u7d22\u5f15\u904d\u5386\uff0carrays.tostring() \u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\uff0cstream api \u63d0\u4f9b\u6d41\u5904\u7406\u673a\u5236\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/12\/2024111215010821054.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u6570\u7ec4\u4fbf\u5229\u63d2\u56fe\" alt=\"java\u600e\u4e48\u6570\u7ec4\u4fbf\u5229\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u904d\u5386\u6570\u7ec4\u7684\u65b9\u6cd5<\/strong><\/p>\n<p><strong>1. \u589e\u5f3a\u578b for \u5faa\u73af<\/strong><\/p>\n<p>\u589e\u5f3a\u578b for \u5faa\u73af\uff0c\u5373\u57fa\u4e8e Java 5 \u53ca\u66f4\u9ad8\u7248\u672c\u4e2d\u7684 <strong>foreach<\/strong> \u5faa\u73af\uff0c\u7528\u4e8e\u904d\u5386\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u3002\u5176\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>for (\u5143\u7d20\u7c7b\u578b \u5143\u7d20\u53d8\u91cf : \u6570\u7ec4\u540d) {\n  \/\/ \u904d\u5386\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[] numbers = {1, 2, 3, 4, 5};\n\nfor (int number : numbers) {\n  System.out.println(number);\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre>1\n2\n3\n4\n5<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f20\u7edf for \u5faa\u73af<\/strong><\/p>\n<p>\u4f20\u7edf\u7684 for \u5faa\u73af\u4f7f\u7528 <strong>length<\/strong> \u5c5e\u6027\u6765\u83b7\u53d6\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u7136\u540e\u4f7f\u7528\u4e00\u4e2a\u8ba1\u6570\u5668\u53d8\u91cf\u6309\u7d22\u5f15\u904d\u5386\u6570\u7ec4\u3002\u5176\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>for (int i = 0; i &lt; \u6570\u7ec4\u540d.length; i++) {\n  \/\/ \u904d\u5386\u6570\u7ec4\u4e2d\u7684\u7b2c i \u4e2a\u5143\u7d20\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>char[] characters = {'a', 'b', 'c', 'd', 'e'};\n\nfor (int i = 0; i &lt; characters.length; i++) {\n  System.out.println(characters[i]);\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre>a\nb\nc\nd\ne<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u4f7f\u7528 Arrays.toString() \u65b9\u6cd5<\/strong><\/p>\n<p>Arrays.toString() \u65b9\u6cd5\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\uff0c\u5176\u4e2d\u5143\u7d20\u7528\u9017\u53f7\u5206\u9694\u3002\u8fd9\u662f\u4e00\u79cd\u7b80\u4fbf\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6253\u5370\u6216\u663e\u793a\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u3002<\/p>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[] numbers = {1, 2, 3, 4, 5};\n\nSystem.out.println(Arrays.toString(numbers));<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre>[1, 2, 3, 4, 5]<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>4. \u4f7f\u7528 Stream API (Java 8+)<\/strong><\/p>\n<p>Java 8 \u5f15\u5165\u4e86 Stream API\uff0c\u53ef\u4ee5\u4f7f\u7528 <strong>stream()<\/strong> \u65b9\u6cd5\u83b7\u5f97\u6570\u7ec4\u7684\u6d41\u3002\u6d41\u63d0\u4f9b\u4e86\u591a\u79cd\u7528\u4e8e\u5904\u7406\u548c\u904d\u5386\u5143\u7d20\u7684\u65b9\u6cd5\uff0c\u4f8b\u5982 forEach() \u548c forEachIndexed()\u3002<\/p>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[] numbers = {1, 2, 3, 4, 5};\n\nArrays.stream(numbers).forEach(System.out::println);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre>1\n2\n3\n4\n5<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u6570\u7ec4\u4fbf\u5229\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 \u4e2d\u904d\u5386\u6570\u7ec4\u6709 4 \u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a\u589e\u5f3a\u578b for \u5faa\u73af\u3001\u4f20\u7edf for \u5faa\u73af\u3001arrays.tostring() \u65b9\u6cd5\u548c stream api\u3002\u589e\u5f3a\u578b for \u5faa\u73af\u4f7f\u7528 foreach \u8bed\u6cd5\uff0c\u4f20\u7edf for \u5faa\u73af\u6309\u7d22\u5f15\u904d\u5386\uff0carrays.tostring() \u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\uff0cstream api \u63d0\u4f9b\u6d41\u5904\u7406\u673a\u5236\u3002 Java \u904d\u5386\u6570\u7ec4\u7684\u65b9\u6cd5 1. \u589e\u5f3a\u578b for \u5faa\u73af \u589e\u5f3a\u578b for \u5faa\u73af\uff0c\u5373\u57fa\u4e8e Java 5 \u53ca\u66f4\u9ad8\u7248\u672c\u4e2d\u7684 foreach \u5faa\u73af\uff0c\u7528\u4e8e\u904d\u5386\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u3002\u5176\u8bed\u6cd5\u5982\u4e0b\uff1a for (\u5143\u7d20\u7c7b\u578b \u5143\u7d20\u53d8\u91cf : \u6570\u7ec4\u540d) { \/\/ \u904d\u5386\u6570\u7ec4\u4e2d\u7684\u5143\u7d20 } \u767b\u5f55\u540e\u590d\u5236 \u793a\u4f8b\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] numbers = {1, 2, 3, 4, 5}; for [&hellip;]<\/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-36727","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/36727","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=36727"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/36727\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=36727"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=36727"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=36727"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}