{"id":1229,"date":"2026-01-04T19:35:42","date_gmt":"2026-01-04T11:35:42","guid":{"rendered":"https:\/\/www.52runoob.com\/?p=1229"},"modified":"2026-01-04T19:35:42","modified_gmt":"2026-01-04T11:35:42","slug":"java%e8%be%93%e5%87%ba%e6%95%b0%e7%bb%84%e7%9a%84%e5%ae%9e%e7%8e%b0%e6%96%b9%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/www.52runoob.com\/index.php\/2026\/01\/04\/java%e8%be%93%e5%87%ba%e6%95%b0%e7%bb%84%e7%9a%84%e5%ae%9e%e7%8e%b0%e6%96%b9%e5%bc%8f\/","title":{"rendered":"java\u8f93\u51fa\u6570\u7ec4\u7684\u5b9e\u73b0\u65b9\u5f0f"},"content":{"rendered":"\n

\u5728 Java \u4e2d\u8f93\u51fa\u6570\u7ec4<\/strong> \u6709\u5f88\u591a\u65b9\u5f0f\uff0c\u53d6\u51b3\u4e8e\u4f60\u60f3\u8f93\u51fa\u7684\u683c\u5f0f\u3001\u6570\u7ec4\u7c7b\u578b\uff08\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\u3001\u5bf9\u8c61\u6570\u7ec4\uff09\u4ee5\u53ca\u662f\u5426\u9700\u8981\u5728\u63a7\u5236\u53f0\u3001\u6587\u4ef6\u6216\u65e5\u5fd7\u4e2d\u8f93\u51fa\u3002\u4e0b\u9762\u6211\u7ed9\u4f60\u4e00\u4e2a\u7cfb\u7edf\u6027\u7684\u6574\u7406\uff0c\u6db5\u76d6\u5e38\u89c1\u65b9\u6cd5\u548c\u793a\u4f8b\u3002<\/p>\n\n\n\n

\n\n\n\n

1. \u4f7f\u7528 for<\/code> \u5faa\u73af\u8f93\u51fa<\/h2>\n\n\n\n

\u8fd9\u662f\u6700\u4f20\u7edf\u3001\u6700\u76f4\u89c2\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n

\u793a\u4f8b\uff1a\u57fa\u672c\u7c7b\u578b\u6570\u7ec4<\/h3>\n\n\n
\nint[] arr = {1, 2, 3, 4, 5};\n\n\/\/ \u666e\u901a for \u5faa\u73af\nfor (int i = 0; i &lt; arr.length; i++) {\n    System.out.print(arr[i] + " ");\n}\nSystem.out.println();\n\n\/\/ \u589e\u5f3a for \u5faa\u73af\uff08foreach\uff09\nfor (int num : arr) {\n    System.out.print(num + " ");\n}\nSystem.out.println();\n\n<\/pre><\/div>\n\n\n
\u8f93\u51fa\uff1a<\/p>\n\n\n
\n1 2 3 4 5\n1 2 3 4 5\n\n<\/pre><\/div>\n\n\n
\n\n\n\n
2. \u4f7f\u7528 Arrays.toString()<\/code> \u8f93\u51fa\u4e00\u7ef4\u6570\u7ec4<\/h2>\n\n\n\n
Java \u63d0\u4f9b\u4e86 java.util.Arrays<\/code> \u5de5\u5177\u7c7b\uff0c\u65b9\u4fbf\u8f93\u51fa\u6570\u7ec4\u3002<\/p>\n\n\n
\nimport java.util.Arrays;\n\nint[] arr = {1, 2, 3, 4, 5};\nSystem.out.println(Arrays.toString(arr));\n\n<\/pre><\/div>\n\n\n
\u8f93\u51fa\uff1a<\/p>\n\n\n
\n[1, 2, 3, 4, 5]\n\n<\/pre><\/div>\n\n\n
\n
\u2705 \u4f18\u70b9\uff1a\u7b80\u5355\u3001\u53ef\u8bfb\u6027\u9ad8
\u274c \u7f3a\u70b9\uff1a\u53ea\u9002\u5408\u4e00\u7ef4\u6570\u7ec4<\/p>\n<\/blockquote>\n\n\n\n
\n\n\n\n
3. \u4f7f\u7528 Arrays.deepToString()<\/code> \u8f93\u51fa\u591a\u7ef4\u6570\u7ec4<\/h2>\n\n\n\n
\u5bf9\u4e8e\u4e8c\u7ef4\u6216\u591a\u7ef4\u6570\u7ec4\uff0c\u4f7f\u7528 deepToString<\/code>\uff1a<\/p>\n\n\n
\nint[][] arr2D = {{1, 2}, {3, 4}, {5, 6}};\nSystem.out.println(Arrays.deepToString(arr2D));\n\n<\/pre><\/div>\n\n\n
\u8f93\u51fa\uff1a<\/p>\n\n\n
\n[[1, 2], [3, 4], [5, 6]]\n\n<\/pre><\/div>\n\n\n
\n\n\n\n
4. \u4f7f\u7528 String.join<\/code>\uff08\u5b57\u7b26\u6570\u7ec4\u6216\u5b57\u7b26\u4e32\u6570\u7ec4\uff09<\/h2>\n\n\n\n
\u5982\u679c\u662f \u5b57\u7b26\u4e32\u6570\u7ec4<\/strong>\uff0c\u53ef\u4ee5\u4f7f\u7528 String.join()<\/code>\uff1a<\/p>\n\n\n
\nString[] names = {"Alice", "Bob", "Charlie"};\nSystem.out.println(String.join(", ", names));\n\n<\/pre><\/div>\n\n\n
\u8f93\u51fa\uff1a<\/p>\n\n\n
\nAlice, Bob, Charlie\n\n<\/pre><\/div>\n\n\n
\n
\u2705 \u53ef\u81ea\u5b9a\u4e49\u5206\u9694\u7b26<\/p>\n<\/blockquote>\n\n\n\n
\n\n\n\n
5. \u4f7f\u7528 Streams<\/code>\uff08Java 8+\uff09<\/h2>\n\n\n\n
Java 8 \u5f15\u5165\u4e86 Stream API\uff0c\u53ef\u4ee5\u66f4\u7075\u6d3b\u5730\u5904\u7406\u6570\u7ec4\u8f93\u51fa\uff1a<\/p>\n\n\n
\nimport java.util.Arrays;\n\nint[] arr = {1, 2, 3, 4, 5};\n\n\/\/ \u6253\u5370\u6bcf\u4e2a\u5143\u7d20\nArrays.stream(arr).forEach(System.out::println);\n\n\/\/ \u8f6c\u4e3a\u9017\u53f7\u5206\u9694\u7684\u5b57\u7b26\u4e32\nString result = Arrays.stream(arr)\n        .mapToObj(String::valueOf)\n        .reduce((a, b) -> a + ", " + b)\n        .orElse("");\nSystem.out.println(result);\n\n<\/pre><\/div>\n\n\n
\u8f93\u51fa\uff1a<\/p>\n\n\n
\n1\n2\n3\n4\n5\n1, 2, 3, 4, 5\n\n<\/pre><\/div>\n\n\n
\n\n\n\n
6. \u4f7f\u7528 Collections<\/code> \u65b9\u5f0f\uff08\u5bf9\u8c61\u6570\u7ec4\uff09<\/h2>\n\n\n\n
\u5982\u679c\u662f \u5bf9\u8c61\u6570\u7ec4<\/strong>\uff0c\u53ef\u4ee5\u5148\u8f6c\u4e3a List<\/code> \u518d\u8f93\u51fa\uff1a<\/p>\n\n\n
\nInteger[] arr = {1, 2, 3, 4, 5};\nSystem.out.println(Arrays.asList(arr));\n\n<\/pre><\/div>\n\n\n
\u8f93\u51fa\uff1a<\/p>\n\n\n
\n[1, 2, 3, 4, 5]\n\n<\/pre><\/div>\n\n\n
\n
\u2705 \u4f18\u70b9\uff1a\u5bf9\u8c61\u6570\u7ec4\u5f88\u65b9\u4fbf
\u274c \u7f3a\u70b9\uff1a\u4e0d\u80fd\u76f4\u63a5\u7528\u4e8e\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff08\u9700\u7528\u5305\u88c5\u7c7b\uff0c\u5982 Integer<\/code>\uff09<\/p>\n<\/blockquote>\n\n\n\n
\n\n\n\n
7. \u81ea\u5b9a\u4e49\u683c\u5f0f\u8f93\u51fa<\/h2>\n\n\n\n
\u5982\u679c\u4f60\u60f3\u8f93\u51fa\u66f4\u81ea\u7531\u7684\u683c\u5f0f\uff0c\u53ef\u4ee5\u7528\u5faa\u73af\u62fc\u63a5\uff1a<\/p>\n\n\n
\nint[] arr = {1, 2, 3, 4, 5};\nStringBuilder sb = new StringBuilder();\nsb.append("{");\nfor (int i = 0; i &lt; arr.length; i++) {\n    sb.append(arr[i]);\n    if (i != arr.length - 1) sb.append("; ");\n}\nsb.append("}");\nSystem.out.println(sb.toString());\n\n<\/pre><\/div>\n\n\n
\u8f93\u51fa\uff1a<\/p>\n\n\n
\n{1; 2; 3; 4; 5}\n\n<\/pre><\/div>\n\n\n
\n\n\n\n
\u603b\u7ed3<\/h3>\n\n\n\n
\u65b9\u6cd5<\/th>\u9002\u7528\u573a\u666f<\/th>\u4f18\u70b9<\/th>\u7f3a\u70b9<\/th><\/tr><\/thead>
for\/foreach<\/td>\u6240\u6709\u6570\u7ec4<\/td>\u7075\u6d3b<\/td>\u4ee3\u7801\u7565\u957f<\/td><\/tr>
Arrays.toString<\/td>\u4e00\u7ef4\u6570\u7ec4<\/td>\u7b80\u5355<\/td>\u4ec5\u4e00\u7ef4<\/td><\/tr>
Arrays.deepToString<\/td>\u591a\u7ef4\u6570\u7ec4<\/td>\u7b80\u5355<\/td>\u591a\u7ef4\u4e13\u7528<\/td><\/tr>
String.join<\/td>\u5b57\u7b26\u4e32\u6570\u7ec4<\/td>\u53ef\u81ea\u5b9a\u4e49\u5206\u9694\u7b26<\/td>\u4ec5\u5b57\u7b26\u4e32\u6570\u7ec4<\/td><\/tr>
Streams<\/td>Java 8+<\/td>\u7075\u6d3b\u3001\u53ef\u94fe\u5f0f\u64cd\u4f5c<\/td>\u521d\u5b66\u8005\u7a0d\u590d\u6742<\/td><\/tr>
Arrays.asList<\/td>\u5bf9\u8c61\u6570\u7ec4<\/td>\u53ef\u76f4\u63a5\u6253\u5370<\/td>\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\u9700\u5305\u88c5\u7c7b<\/td><\/tr>
StringBuilder \u81ea\u5b9a\u4e49<\/td>\u6240\u6709<\/td>\u81ea\u5b9a\u4e49\u8f93\u51fa<\/td>\u4ee3\u7801\u7a0d\u7e41\u7410<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"
\u5728 Java \u4e2d\u8f93\u51fa\u6570\u7ec4 \u6709\u5f88\u591a\u65b9\u5f0f\uff0c\u53d6\u51b3\u4e8e\u4f60\u60f3\u8f93\u51fa\u7684\u683c\u5f0f\u3001\u6570\u7ec4\u7c7b\u578b\uff08\u57fa\u672c\u7c7b\u578b\u6570… Continue Reading →<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[],"class_list":["post-1229","post","type-post","status-publish","format-standard","hentry","category-java"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/1229","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/comments?post=1229"}],"version-history":[{"count":1,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/1229\/revisions"}],"predecessor-version":[{"id":1230,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/1229\/revisions\/1230"}],"wp:attachment":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/media?parent=1229"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/categories?post=1229"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/tags?post=1229"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}