java遍历目录下所有文件

private static List<String> list = new ArrayList<String>();
    public static void main(String[] args){
        FileOperate iFile = new FileOperate();
        File file = new File("E:\\");
        iFile.findFile(file);
    }

    public void findFile(File file){
        File[] files = file.listFiles();
        if (files == null){
            return;
        }else{
            for (int i = 0; i < files.length; i++){
                if (files[i].isDirectory()){
                    System.out.println("正在扫描"+files[i].getAbsolutePath());
                    findFile(files[i].getAbsoluteFile());
                }else{
                    if(files[i].getName().endsWith("avi")){
                        list.add(files[i].getAbsolutePath());
                    }
                }
            }
        }
    }