public int lastIndexOf (int ch)

Returns the index within this string of the last occurrence of the specified character. For values of ch in the range from 0 to 0xFFFF (inclusive), the index (in Unicode code units) returned is the largest value k such that:

 this.charAt(k) == ch
 

is true. For other values of ch, it is the largest value k such that:

 this.codePointAt(k) == ch
 

is true. In either case, if no such character occurs in this string, then -1 is returned. The String is searched backwards starting at the last character.

Parameters:

ch

a character (Unicode code point).

Returns:  the index of the last occurrence of the character in the character sequence represented by this object, or -1 if the character does not occur.