java traversal path to develop file in the folder to find the file and print out the path

package com.dn.UI;

import java.io.File;
import java.util.ArrayList;

public class FindFile {
    public static ArrayList<File> getListFiles(Object obj) {
        File directory = null;
        if (obj instanceof File) {
            directory = (File) obj;
        } else {
            directory = new File(obj.toString());
        }
        ArrayList<File> files = new ArrayList<File>();
        if (directory.isFile()) {
            files.add(directory);
            return files;
        } else if (directory.isDirectory()) {
            File[] fileArr = directory.listFiles();
            for (int i = 0; i < fileArr.length; i++) {
                File fileOne = fileArr[i];
                files.addAll(getListFiles(fileOne));
            }
        }
        return files;
    }

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        FindFile ff = new FindFile();
        ArrayList<File> files = ff.getListFiles("E:\\tem");
        // SystemUtil.printFilesFilePath(files);
        System.out.println(files);
    }

}

输出结果：

[E: \ is \ 1.png E: \ is \ 20192208092223.png E: \ is \ TEM1 \ 20195308105326.png]