Remove a trailing slash from a string(changed from url type) in JAVA

Question

I want to remove the trailing slash from a string in Java.

I want to check if the string ends with a url, and if it does, i want to remove it.

Here is what I have:

String s = "http://almaden.ibm.com/";  s= s.replaceAll("/",""); 

and this:

String s = "http://almaden.ibm.com/"; length  =  s.length(); --length; Char buff = s.charAt((length); if(buff == '/') {      LOGGER.info("ends with trailing slash"); /*how to remove?*/ } else  LOGGER.info("Doesnt end with trailing slash"); 

But neither work.

Answer 1

There are two options: using pattern matching (slightly slower):

s = s.replaceAll("/$", ""); 

or:

s = s.replaceAll("/\\z", ""); 

And using an if statement (slightly faster):

if (s.endsWith("/")) {     s = s.substring(0, s.length() - 1); } 

or (a bit ugly):

s = s.substring(0, s.length() - (s.endsWith("/") ? 1 : 0)); 

Please note you need to use s = s..., because Strings are immutable.

Answer 2

This should work better:

url.replaceFirst("/*$", "")