Reading from file. create a variable with the name Java

Question

Okay, Im working on a project that requires me to save a large volume of files. in the format .dat with information that the variable stores stored inside the file. Is there a way in Java 1.7 to create a variable with the name that it reads from file? If not what would be the best way to create an ever growing number of variables? Im at a bit of a loss, I don't know of a way to do what i need... Dpes anyone have any advice?

Answer 1

You can use any Map implementation like LinkedHashMap , HashMap or Hashtable . They all store objects classified by keys which have their corresponding values.

You would declare this object as:

Map myMap = new Hashtable<String, File>();

Do whatever implementation for file input, you can then use the put() method like:

myMap.put("fileName", fileInstance);

You can remove a key, check for a key existance, check for a value existance, iterate over the keys and over values.

Answer 2

您可以使用集合（即List（java.util.List）。也可以将对象的集合存储在文件中（我认为使用serialize和de-serialize可以提高读取和写入数据的速度）