Does Scala / java have something like StringIO from python?

Question

I would like to know that if java / scala has a "string object that can act as a file" like StringIO in python? I believe this would be better than writing and reading a lot of temporary file. I prefer scala, but java should be ok too.

Answer 1

It depends on how it is used. You see, while you are doing stuff with a file in Python, you're not doing anything with File in Java! Well, besides tasks like checking permission, creating, etc.

All I / O operations in Java and Scala are based on one of two concepts:

• InputStream and OutputStream
• Reader and Writer

What you do is create one of these classes by passing the File as parameter. So, if any of the APIs you use intend to get a File , you can't do anything about it. However, the API, as a rule, takes one of the above classes, not File , and they all have an available version of the string.

As for Scala, then also scala.io.Stream , for which you can also create it based on String .

Answer 2

I believe StringWriter is what you are looking for.

Answer 3

Java has a ByteArrayOutputStream .

 OutputStream out = new ByteArrayOutputStream(); out.write(...); String result = new String(out.toByteArray());