File类之统计文件数

package fileitem;import java.io.File;/** * File 类使用之统计文件数 * @author DuDu * */public class FileAll {private static int Num = 0;public static void main(String[] args) {String path = "D:\\好玩的";File file = new File(path);isDir(file);System.out.println("统计结果-->"+Num);}public static void isDir(File file){File[] files = file.listFiles();if(files == null) return ;for(File f : files){if(f.isDirectory()){isDir(f);}else{Num++;}}}}