Java program to traverse all files of a directory/folder

Given a directory (folder) and we have to traverse its all files using java program.

Example:

Input:
Enter path: 'E:\Java'
(Java folder in 'E' drive)

Output:
About to traverse the directory: JAVA
   About to traverse the directory: 1 Nov
      Visiting file:ChristmasTree.java
      Visiting file:Find Files in Zip File.docx      
   Finished with the directory: 1 Nov
   About to traverse the directory: 2 Nov
      Visiting file:Combine Path.docx
      Visiting file:CombinePath.java
   Finished with the directory: 2 Nov
   About to traverse the directory: 3 Nov
      Visiting file:Check absolute path.docx
      Visiting file:CheckAbsolutePath.java
   Finished with the directory: 2 Nov

Program to traverse all files from a directory in java

import java.io.IOException; import java.nio.file.*; import java.nio.file.attribute.BasicFileAttributes; import java.util.Scanner; public class TraverseFileSystem { public static void main(String[] args) { try { // create object of scanner. Scanner KB = new Scanner(System.in); // enter path here. System.out.print("Enter path here : "); String A = KB.next(); Path path = Paths.get(A); ListFiles listFiles = new ListFiles(); Files.walkFileTree(path, listFiles); } catch (IOException e) { e.printStackTrace(); } } } class ListFiles extends SimpleFileVisitor < Path > { private final int indentionAmount = 3; private int indentionLevel; public ListFiles() { indentionLevel = 0; } private void indent() { for (int i = 0; i < indentionLevel; i++) { System.out.print(' '); } } public FileVisitResult visitFile(Path file, BasicFileAttributes attributes) { indent(); System.out.println("Visiting file:" + file.getFileName()); return FileVisitResult.CONTINUE; } public FileVisitResult postVisitDirectory(Path directory, IOException e) throws IOException { indentionLevel = indentionAmount; indent(); System.out.println("Finished with the directory: " + directory.getFileName()); return FileVisitResult.CONTINUE; } public FileVisitResult preVisitDirectory(Path directory, BasicFileAttributes attributes) throws IOException { indent(); System.out.println("About to traverse the directory: " + directory.getFileName()); indentionLevel += indentionAmount; return FileVisitResult.CONTINUE; } public FileVisitResult visitFileFailed(Path file, IOException exc) throws IOException { System.out.println("A file traversal error ocurred"); return super.visitFileFailed(file, exc); } }

Output

Enter path here : E:/JAVA About to traverse the directory: JAVA About to traverse the directory: 1 Nov Visiting file:ChristmasTree.java Visiting file:Find Files in Zip File.docx Finished with the directory: 1 Nov About to traverse the directory: 2 Nov Visiting file:Combine Path.docx Visiting file:CombinePath.java Finished with the directory: 2 Nov About to traverse the directory: 3 Nov Visiting file:Check absolute path.docx Visiting file:CheckAbsolutePath.java Finished with the directory: 2 Nov

Java program to traverse all files of a directory/folder

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Program to traverse all files from a directory in java

Java File Handling Programs

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