Java 显示根目录listRoots

import java.io.*;

public class Main {
   public static void main(String[] args) {
      File[] roots = File.listRoots();
      System.out.println("Root directories in your system are:");

      for (int i = 0; i < roots.length; i++) {
         System.out.println(roots[i].toString());
      }
   }
}