java文件系统

import java.io.File;

public class test {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub

        String dirname = "./";
        File f1 = new File(dirname);
        if(f1.isDirectory()){
            System.out.println("Directory of "+dirname);
            String s[]=f1.list();
            for(int i =0;i<s.length;i++){
                File f= new File(dirname +"/"+s[i]);
                if(f.isDirectory()){
                    System.out.println(s[i]+" is a directory");
                }else{
                    System.out.println(s[i]+" is a file");
                }
            }
        }
    }

}