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());
}
}
}
}
}