Removing last character from a String

I have a string which has alot of commas. What I want to do is remove the last comma in the String for example:

1,2,3,4,5,

I want it to be 1,2,3,4,5

I dont want to remove all the commas just the last character.

Thank you for your help

String (Java Platform SE 6)

string = string.substring(0, string.length()-1);

Thank you =]