遞歸遍歷路徑下所有文件算法

private static ArrayList filelist = new ArrayList();
   
    public static void main(String[] args) {
        refreshFileList("c:\\java");
    }
    public static void refreshFileList(String strPath) {
        File dir = new File(strPath);
        File[] files = dir.listFiles();
       
        if (files == null)
            return;
        for (int i = 0; i < files.length; i++) {
            if (files[i].isDirectory()) {
                refreshFileList(files[i].getAbsolutePath());
            } else {
                String strFileName = files[i].getAbsolutePath().toLowerCase();
                System.out.println("---"+strFileName);
                filelist.add(files[i].getAbsolutePath());                   
            }
        }
    }
}