Shulou(Shulou.com)05/31 Report--

This article mainly explains "how to traverse folders in Java". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "how Java traverses folders".

/ * * traverse the folder * /

Public class TraversalFolder {/ * depth-first traversal of folders *

* key points: use recursion to implement. * * [@ param] (https://my.oschina.net/u/2303379) topFile * [@ param] (https://my.oschina.net/u/2303379) orderedList * / public static void depthFirstSearch (File topFile, ArrayList orderedList) {if (null! = topFile) {if (topFile.isDirectory ()) {File [] files = topFile.listFiles () For (File file: files) {if (file.isDirectory ()) {depthFirstSearch (file, orderedList);} else {orderedList.add (file);} else {orderedList.add (topFile) }} / * breadth priority traversal of folders *

* main points: use the first-in-first-out feature of the stack to achieve. * * [@ param] (https://my.oschina.net/u/2303379) topFile * [@ param] (https://my.oschina.net/u/2303379) orderedList * [@ param] (https://my.oschina.net/u/2303379) maxNum * / public static void breadthFirstSearch (File topFile, ArrayList orderedList, int maxNum) {if (null! = topFile) {LinkedBlockingQueue queue = new LinkedBlockingQueue (maxNum); queue.offer (topFile) While (! queue.isEmpty ()) {File file = queue.poll (); if (file.isDirectory ()) {File [] files = file.listFiles (); for (File f: files) {if (f.isDirectory ()) {queue.offer (f) } else {orderedList.add (f);} else {orderedList.add (file) } public static void main (String [] args) {String path = "C:\\ Users\\ jxn\\ Desktop\\ New folder (3)"; File topFile = new File (path); ArrayList orderedList = new ArrayList (); / / depthFirstSearch (topFile,orderedList); breadthFirstSearch (topFile,orderedList, 100) OrderedList.stream () .forEach ((x)-> {System.out.println (x.getAbsoluteFile ());});}

}

At this point, I believe you have a deeper understanding of "how Java traverses folders". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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