import java.io.File;  public class SpaceChecker {    public static void main(String[] args) {      File[] roots = File.listRoots();      for (int i = 0; i < roots.length; i++) {        System.out.println(roots[i]);        System.out.println("Free space = " + roots[i].getFreeSpace());        System.out.println("Usable space = " + roots[i].getUsableSpace());        System.out.println("Total space = " + roots[i].getTotalSpace());        System.out.println();      }    }  }