{"id":34201,"date":"2023-03-02T21:17:18","date_gmt":"2023-03-02T15:47:18","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-get-latest-file-directory-wise-in-java\/"},"modified":"2023-03-02T21:17:18","modified_gmt":"2023-03-02T15:47:18","slug":"solved-get-latest-file-directory-wise-in-java","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-get-latest-file-directory-wise-in-java\/","title":{"rendered":"[Solved] Get latest file directory wise in java"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-34614406\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"34614406\" data-parentid=\"34605587\" data-score=\"1\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>Find below a small snippet which does what you want to achieve.<\/p>\n<p>For demonstration purpose it also generates some example directories and files.<\/p>\n<pre><code>import java.io.File;\nimport java.io.IOException;\nimport java.nio.file.Files;\nimport java.nio.file.Path;\nimport java.nio.file.Paths;\nimport java.util.Date;\nimport java.util.Optional;\nimport static java.util.concurrent.TimeUnit.MINUTES;\n\npublic class FindRecentFileRecursively {\n\n    public static void main(String[] args) throws IOException {\n        \/\/ create some dummy directories\/files\n        Path root = Paths.get(\"\/tmp\/foobar\");\n        for (char c=\"A\"; c &lt;= 'C'; c++) {\n            Path dir = root.resolve(\"dir_\" + c);\n            System.out.println(\"create sample directory \" + dir.toString());\n            Files.createDirectories(dir);\n            long now = System.currentTimeMillis();\n            for (int i = 1; i &lt;= 3; i++) {\n                File file = dir.resolve(\"file\" + i).toFile();\n                file.createNewFile();\n                file.setLastModified(now + MINUTES.toMillis(i));\n                printFileInfo(file);\n            }\n        }\n\n        System.out.println(\"list the most recent file per directory\");\n        \/\/ find all directories below \/tmp\/foobar\n        Files.find(root, Integer.MAX_VALUE, (path, attrs) -&gt; attrs.isDirectory())\n                \/\/ for each directory\n                .forEach((dir) -&gt; {\n                    try {\n                        \/\/ find all contained files\n                        Optional&lt;Path&gt; recentFile = Files.find(dir, 1, \n                                  (path, attrs) -&gt; attrs.isRegularFile())\n                                \/\/ return the file with the recent last\n                                \/\/ modification time\n                                .max((p1, p2)\n                                        -&gt; Long.compare(\n                                    p1.toFile().lastModified(),\n                                    p2.toFile().lastModified()));\n                        \/\/ if a file was found\n                        if (recentFile.isPresent()) {\n                            \/\/ print modification time and file name\n                            printFileInfo(recentFile.get().toFile());\n                        }\n                    } catch (IOException ex) {\n                        ex.printStackTrace(System.err);\n                    }\n                });\n    }\n\n    private static void printFileInfo(File file) {\n        System.out.printf(\"  mtime: %td.%&lt;tm.%&lt;tY  %&lt;tH:%&lt;tM:%&lt;tS  file: %s%n\",\n                new Date(file.lastModified()),\n                file.getAbsolutePath()\n        );\n    }\n}\n<\/code><\/pre>\n<p><strong>output<\/strong> like<\/p>\n<pre><code>create sample directory \/tmp\/foobar\/dir_A\n  mtime: 05.01.2016  15:35:15  file: \/tmp\/foobar\/dir_A\/file1\n  mtime: 05.01.2016  15:36:15  file: \/tmp\/foobar\/dir_A\/file2\n  mtime: 05.01.2016  15:37:15  file: \/tmp\/foobar\/dir_A\/file3\ncreate sample directory \/tmp\/foobar\/dir_B\n  mtime: 05.01.2016  15:35:15  file: \/tmp\/foobar\/dir_B\/file1\n  mtime: 05.01.2016  15:36:15  file: \/tmp\/foobar\/dir_B\/file2\n  mtime: 05.01.2016  15:37:15  file: \/tmp\/foobar\/dir_B\/file3\ncreate sample directory \/tmp\/foobar\/dir_C\n  mtime: 05.01.2016  15:35:15  file: \/tmp\/foobar\/dir_C\/file1\n  mtime: 05.01.2016  15:36:15  file: \/tmp\/foobar\/dir_C\/file2\n  mtime: 05.01.2016  15:37:15  file: \/tmp\/foobar\/dir_C\/file3\n\nlist the most recent file per directory\n  mtime: 05.01.2016  15:37:15  file: \/tmp\/foobar\/dir_A\/file3\n  mtime: 05.01.2016  15:37:15  file: \/tmp\/foobar\/dir_B\/file3\n  mtime: 05.01.2016  15:37:15  file: \/tmp\/foobar\/dir_C\/file3\n<\/code><\/pre>\n<p><strong>update<\/strong> To find the newest files per direct subdirectory of a given root the below snippet will do the work.<\/p>\n<p>Assume a directory structure like<\/p>\n<pre><code>\/tmp\/foobar\n\/tmp\/foobar\/dir_A\n\/tmp\/foobar\/dir_A\/sub_A\n\/tmp\/foobar\/dir_B\n\/tmp\/foobar\/dir_B\/sub_B\n\/tmp\/foobar\/dir_C\n\/tmp\/foobar\/dir_C\/sub_C\n<\/code><\/pre>\n<p>and you start with the <code>root<\/code> directory as <code>\/tmp\/foobar<\/code> the code will return the newest file in <code>\/tmp\/foobar\/dir_A<\/code> and below, in <code>\/tmp\/foobar\/dir_B<\/code> and below &#8230;<\/p>\n<pre><code>System.out.println(\"list the most recent file per direct subdirectory\");\n\/\/ find all direct directories below \/tmp\/foobar\nFiles.find(root, 1, (path, attrs) -&gt; attrs.isDirectory())\n        \/\/ filter out the root itself\n        .filter(p -&gt; !p.equals(root))\n        .forEach((dir) -&gt; {\n            try {\n                \/\/ find all contained files in any subdirectory\n                Optional&lt;Path&gt; recentFile = Files.find(dir, Integer.MAX_VALUE, \n                            (path, attrs) -&gt; attrs.isRegularFile())\n                        \/\/ return the file with the recent last\n                        \/\/ modification time\n                        .max((p1, p2)\n                                -&gt; Long.compare(p1.toFile().lastModified(),\n                                   p2.toFile().lastModified()));\n                \/\/ if a file was found\n                if (recentFile.isPresent()) {\n                    \/\/ print modification time and file name\n                    printFileInfo(recentFile.get().toFile());\n                }\n            } catch (IOException ex) {\n                ex.printStackTrace(System.err);\n            }\n        });\n<\/code><\/pre>\n<p><strong>output<\/strong><\/p>\n<pre><code>mtime: 08.01.2016  13:10:57  file: r:\\temp\\foobar\\dir_A\\sub_A\\file1\nmtime: 08.01.2016  13:11:39  file: r:\\temp\\foobar\\dir_B\\sub_B\\file3\nmtime: 08.01.2016  13:11:19  file: r:\\temp\\foobar\\dir_C\\file1\n<\/code><\/pre>\n<p><strong>edit<\/strong> Following snippet also works with Java 6.<\/p>\n<pre><code>File root = new File(\"\/tmp\/foobar\");\nFile[] topDirectories = root.listFiles(new FileFilter() {\n    @Override\n    public boolean accept(File file) {\n        return file.isDirectory();\n    }\n});\nSystem.out.println(\"topDirectories = \" + Arrays.toString(topDirectories));\nfor (File directory : topDirectories) {\n    File recentFile = new File(\"\");\n    recentFile.setLastModified(0L);\n    recentFile = getRecentFile(directory, recentFile);\n    System.out.println(\"recentFile = \" + recentFile);\n}\n<\/code><\/pre>\n<p>.<\/p>\n<pre><code>\/\/ if you have a huge amount of files in deeply nested directories\n\/\/ this might need some further tuning\nstatic File getRecentFile(File dir, File baseFile) {\n    File recentFile = baseFile;\n    for (File file : dir.listFiles()) {\n        if (file.isDirectory()) {\n            recentFile = getRecentFile(file, recentFile);\n        } else {\n            if (file.lastModified() &gt; recentFile.lastModified())  {\n                recentFile = file;\n            }\n        }\n    }\n    return recentFile;\n}\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">11<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Get latest file directory wise in java <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Find below a small snippet which does what you want to achieve. For demonstration purpose it also generates some example directories and files. import java.io.File; import java.io.IOException; import java.nio.file.Files; import java.nio.file.Path; import java.nio.file.Paths; import java.util.Date; import java.util.Optional; import static java.util.concurrent.TimeUnit.MINUTES; public class FindRecentFileRecursively { public static void main(String[] args) throws IOException { \/\/ create &#8230; <a title=\"[Solved] Get latest file directory wise in java\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-get-latest-file-directory-wise-in-java\/\" aria-label=\"More on [Solved] Get latest file directory wise in java\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[323],"class_list":["post-34201","post","type-post","status-publish","format-standard","hentry","category-solved","tag-java"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Get latest file directory wise in java - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-get-latest-file-directory-wise-in-java\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Get latest file directory wise in java - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Find below a small snippet which does what you want to achieve. 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