To read all files from a folder in Java, you can use the java.io.File class or the java.nio.file.Files class. Here’s an example using Files class in Java 8:

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;

public class ReadFilesFromFolderExample {

    public static void main(String[] args) {
        String folderPath = "path/to/folder";
        try {
            List<Path> files = Files.list(Paths.get(folderPath)).filter(Files::isRegularFile).toList();
            for (Path file : files) {
                System.out.println(file.getFileName());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Using Regular Files

File folder = new File("path/to/folder/");
File[] listOfFiles = folder.listFiles();

for (File file : listOfFiles) {
    if (file.isFile()) {
        System.out.println(file.getName());
    }
}