How to read a File using FileInputStream compatible in all OS

Question

I am having a file and i need to read it using FileInputStream in java. I need to give the path which should be readable in all OS. Now i have given

(new FileInputStream("..\\config.properties"));

which is a windows readable format But this is a non readable in Unix.

Is there any way common for all OS.

Answer 1

You have two options:

1. For standalone classes you can use:

     new FileInputStream("../config.properties") 

2. For classes in JAR file you can use:

    InputStream input = getClass().getResourceAsStream("../config.properties"); 

This should help.

Answer 2

Yes. Instead of

new FileInputStream("..\\config.properties")

This should work everywhere

new FileInputStream("../config.properties")

Or you could use

new FileInputStream(".." + java.io.File.separator + "config.properties")