java 批次顯示檔案名稱

public static ArrayList<File> showFileName() // 抓csv為附檔名
{
File file = new File(".");
File[] files = file.listFiles();
String filename;
ArrayList<File> fileList = new ArrayList<File>();

for (int i = 0; i < files.length; i++) {
filename = files[i].toString();
if (filename.substring((filename.length() - 3)).equals("csv"))
{
fileList.add(files[i]);
}
}//end for
return fileList;
}//showFileName end