How to read all files in a folder from Java?

Question

How to read all the files in a folder through Java? It doesn't matter which API.

Answer 1

public void listFilesForFolder(final File folder) {     for (final File fileEntry : folder.listFiles()) {         if (fileEntry.isDirectory()) {             listFilesForFolder(fileEntry);         } else {             System.out.println(fileEntry.getName());         }     } }  final File folder = new File("/home/you/Desktop"); listFilesForFolder(folder); 

Files.walk API is available from Java 8.

try (Stream<Path> paths = Files.walk(Paths.get("/home/you/Desktop"))) {     paths         .filter(Files::isRegularFile)         .forEach(System.out::println); }  

The example uses try-with-resources pattern recommended in API guide. It ensures that no matter circumstances the stream will be closed.