Java 8 List all Files in Directory and Subdirectories

List All Files in Directory and Subdirectories

Files.walk Return a Stream that is lazily populated with Path by walking the file tree rooted at a given starting file.

Files.list Method Return a lazily populated Stream for the current directory only,Files.walk can be used to get list of files from Directory & Subdirectories .

Example 1: List All Files in Directory and Subdirectories

List All Files in Directory and Subdirectories

public static void main(String[] args) throws IOException {

		Path start = Paths.get("C:\\data\\");
		try (Stream<Path> stream = Files.walk(start, Integer.MAX_VALUE)) {
		    List<String> collect = stream
		        .map(String::valueOf)
		        .sorted()
		        .collect(Collectors.toList());
		    
		    collect.forEach(System.out::println);
		}
		
		
	}

Note

Files.walk method takes int maxDepth as parameter. The maxDepth parameter is the maximum number of levels of directories to visit.
MAX_VALUE may be used to indicate that all levels should be visited. Value 1 can be used to list files in current Directory.

Example 2: List All Files in Current Directory only

List All Files in Current Directory only

public static void main(String[] args) throws IOException {

		Path start = Paths.get("C:\\data\\");
		try (Stream<Path> stream = Files.walk(start, 1)) {
		    List<String> collect = stream
		        .map(String::valueOf)
		        .sorted()
		        .collect(Collectors.toList());
		    
		    collect.forEach(System.out::println);
		}
		
		
	}