java统计文件数量

import java.io.File;public class countFile {String path;static int num;public void getFileNum(String path) {File file = new File(path);if (file.exists()) {File[] f = file.listFiles();for (File fs : f) {if (fs.isFile()) {System.out.println(fs.getName());num++;} else {getFileNum(fs.getAbsolutePath());}}}}public static void main(String[] args) {countFile n = new countFile();n.getFileNum("D:/java");System.out.println(num);}}