{"id":743,"date":"2025-08-21T01:46:58","date_gmt":"2025-08-20T17:46:58","guid":{"rendered":"http:\/\/47.121.202.229\/?p=743"},"modified":"2025-08-21T01:49:34","modified_gmt":"2025-08-20T17:49:34","slug":"2025-8-20%e9%9a%8f%e7%ac%94","status":"publish","type":"post","link":"http:\/\/47.121.202.229\/?p=743","title":{"rendered":"2025.8.20\u968f\u7b14"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>ArrayList&lt;String&gt; lines = IoUtil.<em>readLines<\/em>(in, StandardCharsets.<em>UTF_8<\/em>, new ArrayList&lt;&gt;());<\/code><\/pre>\n\n\n\n<p>java\u7684\u8bed\u6cd5\u7cd6\u673a\u5236\u53ef\u4ee5\u786e\u5b9anew\u51fa\u6765\u7684\u5bf9\u8c61\u662fArrayList&lt;>()\u662fArrayList&lt;String>\uff0cjava\u4e2d\u53ef\u4ee5\u76f4\u63a5\u4f20\u9012\u6cdb\u578b\uff0c\u786e\u5b9a\u6cdb\u578b\uff0c\u540c\u65f6hutool\u7684\u8fd9\u4e2a\u65b9\u6cd5\u4e5f\u8ba4\u53ef\u8fd9\u4e2a\u673a\u5236<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ 1. \u5b9a\u4e49\u4e00\u4e2a\u65b9\u6cd5\uff0c\u5b83\u7684\u53c2\u6570\u662f\u4e00\u4e2a\u201c\u51fd\u6570\u201d\uff08\u5b9e\u9645\u4e0a\u662f\u51fd\u6570\u5f0f\u63a5\u53e3\u5bf9\u8c61\uff09\npublic static List&lt;String> filterStrings(List&lt;String> list, Predicate&lt;String> predicate) {\n    List&lt;String> result = new ArrayList&lt;>();\n    for (String s : list) {\n        if (predicate.test(s)) { \/\/ \u8fd9\u91cc\u8c03\u7528\u4f20\u5165\u7684\u201c\u884c\u4e3a\u201d\u8fdb\u884c\u5224\u65ad\n            result.add(s);\n        }\n    }\n    return result;\n}\n\npublic static void main(String&#91;] args) {\n    List&lt;String> names = Arrays.asList(\"Alice\", \"Bob\", \"David\", \"Charlie\");\n\n    \/\/ 2. \u8c03\u7528\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u5e76\u76f4\u63a5\u4f20\u5165\u4e00\u4e2aLambda\u8868\u8fbe\u5f0f\u4f5c\u4e3a\u201c\u5224\u65ad\u903b\u8f91\u201d\n    \/\/ \u8fd9\u4e2aLambda\u5c31\u662f Predicate&lt;String> \u7c7b\u578b\u7684\u53c2\u6570\n\n    \/\/ \u8fc7\u6ee4\u51fa\u957f\u5ea6\u5927\u4e8e4\u7684\u540d\u5b57\n    List&lt;String> longNames = filterStrings(names, (String s) -> s.length() > 4);\n    System.out.println(longNames); \/\/ &#91;Alice, David, Charlie]\n\n    \/\/ \u8fc7\u6ee4\u51fa\u4ee5\"A\"\u5f00\u5934\u7684\u540d\u5b57 (\u53e6\u4e00\u4e2a\u4e0d\u540c\u7684\u201c\u884c\u4e3a\u201d)\n    List&lt;String> startWithA = filterStrings(names, s -> s.startsWith(\"A\"));\n    System.out.println(startWithA); \/\/ &#91;Alice]\n}<\/code><\/pre>\n\n\n\n<p>Lambda \u8868\u8fbe\u5f0f\u662f\u4f9d\u636e\u51fd\u6570\u5f0f\u63a5\u53e3\u5feb\u901f\u521b\u5efa\u7684\u533f\u540d\u5b9e\u73b0\u7c7b\u5b9e\u4f8b\u3002\u5b83\u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u4f46\u56e0\u4e3a\u5176\u552f\u4e00\u7684\u76ee\u7684\u5c31\u662f\u5b9e\u73b0\u90a3\u4e2a\u62bd\u8c61\u65b9\u6cd5\uff0c\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u5ffd\u7565\u5176\u201c\u5bf9\u8c61\u201d\u7684\u5916\u58f3\uff0c\u800c\u76f4\u63a5\u5173\u6ce8\u5176\u201c\u51fd\u6570\u201d\u7684\u884c\u4e3a\u3002\u8fd9\u4f7f\u5f97\u6211\u4eec\u53ef\u4ee5\u5c06\u4ee3\u7801\uff08\u884c\u4e3a\uff09\u4f5c\u4e3a\u4e00\u79cd\u8f7b\u91cf\u7ea7\u7684\u6570\u636e\u8fdb\u884c\u5b58\u50a8\u548c\u4f20\u9012\uff0c\u6781\u5927\u5730\u63d0\u5347\u4e86Java\u8bed\u8a00\u7684\u8868\u8fbe\u529b\uff0c\u5c24\u5176\u662f\u5728\u96c6\u5408\u64cd\u4f5c\u548c\u5f02\u6b65\u7f16\u7a0b\u4e2d\u3002<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>java\u7684\u8bed\u6cd5\u7cd6\u673a\u5236\u53ef\u4ee5\u786e\u5b9anew\u51fa\u6765\u7684\u5bf9\u8c61\u662fArrayList&lt;>()\u662fArrayList&lt;St [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":282,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20,14],"tags":[],"class_list":["post-743","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-daily","category-14"],"_links":{"self":[{"href":"http:\/\/47.121.202.229\/index.php?rest_route=\/wp\/v2\/posts\/743","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/47.121.202.229\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/47.121.202.229\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/47.121.202.229\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/47.121.202.229\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=743"}],"version-history":[{"count":1,"href":"http:\/\/47.121.202.229\/index.php?rest_route=\/wp\/v2\/posts\/743\/revisions"}],"predecessor-version":[{"id":744,"href":"http:\/\/47.121.202.229\/index.php?rest_route=\/wp\/v2\/posts\/743\/revisions\/744"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/47.121.202.229\/index.php?rest_route=\/wp\/v2\/media\/282"}],"wp:attachment":[{"href":"http:\/\/47.121.202.229\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=743"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/47.121.202.229\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=743"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/47.121.202.229\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=743"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}