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());                    }                }            }        }    }