Question

the file is aa.txt in the directory /home/user
the code I wrote is

input=new FileInputStream("//home//user//aa.txt");

but the program can not open the file. when I run it on windows, it works
what is the format of the path in fedora to be read correctly by the program???

Answer 1

Since \ is used as an escape character (for instance \n = new line and \t = tab) we need to write \\ to mean a single \ when placing this character in a String.

This issue does not exist with a forward slash /
For linux directories the forward slash / is used; windows uses the backslash. Writing OS independent code could be a pain, but it’s not an issue. Just use the forward slash when dealing with files and Java automagically translates it for you to the correct OS specific format.

For instance C:/Users/Owner/Documents becomes C:\Users\Owner\Documents on windows.
Or you could write "C:\\Users\\Owner\\Documents" but the simple forward slash format looks simpler.