java - list files and directories from directory

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// import java.io.File;

File directory = new File("C:\\path\\to\\directory");

String[] names = directory.list();  // contains names of files and directories

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import java.io.File;
import java.io.IOException;

public class Program {

    public static void main(String[] args) throws IOException {
   
        File directory = new File("C:\\path\\to\\directory");
        String[] names = directory.list();  // contains names of files and directories
        if (names != null) {
            for (String name : names) {
                System.out.println(name);
            }
        }
    }
}

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// import java.nio.file.Files;
// import java.nio.file.Paths;

var directoryPath = Paths.get("/path/to/directory");
try (var directoryStream = Files.newDirectoryStream(directoryPath)) {
    for (var entryPath : directoryStream) {
        if (Files.isDirectory(entryPath) || Files.isRegularFile(entryPath)) {
            var fileName = entryPath.getFileName();
            // ...
        }
    }
}


// Note: to find more optimal version go to https://dirask.com/snippets/Java-list-files-and-directories-from-directory-pYPmND

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// import java.nio.file.Files;
// import java.nio.file.Paths;
// import java.nio.file.attribute.BasicFileAttributes;

var directoryPath = Paths.get("/path/to/directory");
try (var directoryStream = Files.newDirectoryStream(directoryPath)) {
    for (var entryPath : directoryStream) {
        var fileSystem = entryPath.getFileSystem();
        var systemProvider = fileSystem.provider();
        var fileAttributes = systemProvider.readAttributes(entryPath, BasicFileAttributes.class);
        if (fileAttributes.isDirectory() || fileAttributes.isRegularFile()) {
            var entryName = entryPath.getFileName();
            // ...
        }
    }
}


// Note: this example reduces number of access to file system provider.