How to read all files in a folder from Java?

Answer 1

package com.commandline.folder;

import java.io.File;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.stream.Stream;

public class FolderReadingDemo {
    public static void main(String[] args) {
        String str = args[0];
        final File folder = new File(str);
//      listFilesForFolder(folder);
        listFilesForFolder(str);
    }

    public static void listFilesForFolder(String str) {
        try (Stream paths = Files.walk(Paths.get(str))) {
            paths.filter(Files::isRegularFile).forEach(System.out::println);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void listFilesForFolder(final File folder) {
        for (final File fileEntry : folder.listFiles()) {
            if (fileEntry.isDirectory()) {
                listFilesForFolder(fileEntry);
            } else {
                System.out.println(fileEntry.getName());
            }
        }
    }

}