Remove string after last occurrence of a character

Question

In my application, I am appending a string to create path to generate a URL. Now I want to remove that appended string on pressing back button.

Suppose this is the s

Answer 1

The third line in Nepster's answer should be

String x =path.substring(pos+1 , path.length());

and not String x =path.substring(pos+1 , path.length()-1); since substring() method takes the end+1 offset as the second parameter.