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

You can use lastIndexOf() method for same with

if (null != str && str.length() > 0 )
{
    int endIndex = str.lastIndexOf("/");
    if (endIndex != -1)  
    {
        String newstr = str.substring(0, endIndex); // not forgot to put check if(endIndex != -1)
    }
}