java 循环读取文件夹里面的文件

public ArrayList<String> list = new ArrayList<String>(0);//用arraylist保存扫描到的路径
public void Scan(String path) {
	File file = new File(path);
	File[] files = file.listFiles();
	String[] filenames = file.list();
	if (filenames == null)
		return;
	for (int i = 0; i < filenames.length; i++) {
		if (files[i].isFile()) {
			if (files[i].getName().endsWith(“png”))//只获取带png结尾的文件
				list.add(files[i].getPath());//获取路径
		} else if (files[i].isDirectory()) {
			Scan(files[i].getPath());
		}
	}
}