change the String of a file'path in Java

Question

As it mentioned in the topic, is there a way to change the String of a file's path in java? For example:

  String fileName = "scripts/css/an.main.master.css";

How can I just keep the file's name “an.main.master.css” and change the folder path "scripts/css" to whatever I want? In other word, how can I detect the last backslash(the substring after that slash will be the file's name, and the substring before that slash will be the path). I am thinking to using Regular Expression, but I am not good at this. Can anyone help?

You could use fileName.substring(fileName.lastIndexOf("/")++) — Kevin L
– Kevin L, Commented Jul 23, 2014 at 18:38

hwnd · Accepted Answer · 2014-07-23 18:51:20Z

1

If regular expression is the way you want to go..

If you want to retain the last forward slash replacing everything before it:

String s = "scripts/css/an.main.master.css";
String r = s.replaceAll("^.*(?=/)", "foo");
// => "foo/an.main.master.css"

Or if you want the last forward slash removed as well:

String s = "scripts/css/an.main.master.css";
String r = s.replaceAll("^.*/", "foo/");
//=> "foo/an.main.master.css"

edited Jul 23, 2014 at 18:51

answered Jul 23, 2014 at 18:45

hwnd

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Comments

Avinash Raj · Accepted Answer · 2014-07-23 18:52:26Z

1

REgex:

^(.*/)(.*)$

Replace:

string$2

string - string you want to replace.

Java code would be,

String fileName = "scripts/css/an.main.master.css";
String m1 = fileName.replaceAll("^(.*/)(.*)$", "string $2");
System.out.println(m1);

IDEONE

edited Jul 23, 2014 at 18:52

answered Jul 23, 2014 at 18:39

Avinash Raj

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