java教程

import java.io.File;

public class DirList {

    public static void main(String args[]) {

        String dirname = "/java";

        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");

                }

            }

        } else {

            System.out.println(dirname + " is not a directory");

        }

    }

}

以上实例编译运行结果如下：

Directory of /java

bin is a directory

lib is a directory

demo is a directory

test.txt is a file

README is a file

index.html is a file

include is a directory