如果只要求列出當前資料夾下的檔案，程式碼如下所示：

package chimomo.learning.java.file;

import java.io.File;

/**
 * @author Chimomo
 */
public class ListFile1 {

    public static void main(String[] args) {
        File f = new File("/Users/XXX/Downloads");
        for (File t : f.listFiles()) {
            if (t.isFile()) {
                System.out.println(t.getName());
            }
        }
    }

}
 

package chimomo.learning.java.file;

import java.io.File;

/**
 * @author Chimomo
 */
public class ListFile2 {

    public static void main(String[] args) {
        listFiles(new File("/Users/XXX/Downloads"));
    }

    public static void listFiles(File f) {
        walkDir(f, 0);
    }

    private static void walkDir(File f, int level) {
        if (f.isDirectory()) {
            for (File t : f.listFiles()) {
                walkDir(t, level + 1);
            }
        } else {
            for (int i = 0; i < level - 1; i++) {
                System.out.print("\t");
            }
            System.out.println(f.getName());
        }
    }

}
 

package chimomo.learning.java.file;

import java.io.IOException;
import java.nio.file.*;
import java.nio.file.attribute.*;

/**
 * @author Chimomo
 */
public class ListFile3 {

    public static void main(String[] args) throws IOException {
        Path initPath = Paths.get("/Users/XXX/Downloads");
        Files.walkFileTree(initPath, new SimpleFileVisitor<Path>() {

            @Override
            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                System.out.println(file.getFileName().toString());
                return FileVisitResult.CONTINUE;
            }

        });
    }

}