import java.io.*;
 
 public class FileList {
     public static void main(String[] args) {
         FileList fl = new FileList();
         fl.listFiles(args[0]);
     }
 
     void listFiles(String fileName) {
         File d = new File(fileName);
         if (!d.isDirectory()) {
             System.out.println(fileName + " is not directory.");
             System.exit(1);
         }
         getSubDirectories(d, 0);
     }
 
     void getSubDirectories(File d, int nest) {
         printFileAttributes(d, nest);
         File[] filelist = d.listFiles();
         for (int i = 0; i < filelist.length; i++) {
             if (filelist[i].isDirectory()) {
                 getSubDirectories(filelist[i], nest + 1);
             } else {
                 printFileAttributes(filelist[i], nest + 1);
             }
         }
     }
 
     void printFileAttributes(File f, int nest) {
         for (int i = 0; i < nest; i++) {
             System.out.print("\t");
         }
         System.out.print("[");
         System.out.print(f.isDirectory()? "d": "f");
         System.out.print(f.canRead()? "r": "-");
         System.out.print(f.canWrite()? "w": "-");
         System.out.print("]");
         System.out.print(f.getName());
         System.out.println();
     }
 }

□ 実行結果

$ java FileList .
[drw].
        [drw]1
                [frw]FileCopy.java
        [drw]2
                [frw]FileCopy.java
                [frw]Stream01.java
    :
        [frw]Stream12.class
        [frw]Stream12.java
        [frw]Sysin.java
        [frw]Sysin2Sysout.class
        [frw]Sysin2Sysout.java