import java.io.File;import javax.swing.filechooser.FileSystemView;/** 显示本地磁盘根盘符，显示桌面路径 */public class RDDemo {    static File[] files;    public static void main(String[] args) {        FileSystemView sys = FileSystemView.getFileSystemView();        files = sys.getRoots();        System.out.println(files.length);        for (int i = 0; i < files.length; i++) {            System.out.println(files[i]);        }        files = File.listRoots();        System.out.println(files.length);        for (int i = 0; i < files.length; i++) {            System.out.println(files[i] + " -- "                    + sys.getSystemTypeDescription(files[i]));        }    }}