import java.io.File;  
      
    public class Test {  
      
        /** 
         * @param args 
         * @author itmyhome 
         */  
        public static void main(String[] args) {  
            File f = new File("F:/javaAPI/JavaAPI1.6/java/awt");  
            printFile(f, 0);  
        }  
      
        public static void printFile(File f, int len) {  
            String str = "";  
            for (int i = 0; i < len; i++) {  
                str += "   "; // 路径空格,以便更好的展现层次结构  
            }  
            File file[] = f.listFiles();  
            for (int i = 0; i < file.length; i++) {  
                  
                System.out.println(str + file[i].getName());  
      
                if (file[i].isDirectory()) {  
                    printFile(file[i], len + 1);  
                }  
            }  
        }  
      
    }