Java example - traverse all directories under the specified directory

The following example demonstrates how to use the list method of the File class to traverse all directories under a specified directory:

/*
 author by w3cschool.cc
 Main.java
 */import java.io.*;class Main {
   public static void main(String[] args) {
      File dir = new File("F:");
      File[] files = dir.listFiles();
      FileFilter fileFilter = new FileFilter() {
         public boolean accept(File file) {
            return file.isDirectory();
         }
      };
      files = dir.listFiles(fileFilter);
      System.out.println(files.length);
      if (files.length == 0) {
         System.out.println("目录不存在或它不是一个目录");
      }
      else {
         for (int i=0; i< files.length; i++) {
            File filename = files[i];
            System.out.println(filename.toString());
         }
      }
   }}

The output result of running the above code is:

14F:\C Drive Data Old HDD
F:\Desktop1
F:\harsh
F:\hharsh finalF:\hhhh
F:\mov
F:\msdownld.tmp
F:\New FolderF:\ravi
F:\ravi3
F:\RECYCLER
F:\System Volume InformationF:\temp
F:\work

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