Removing duplicate characters in a String (user inputted keyword)

Removing duplicate characters in a String (user inputted keyword)

private String removeDuplicates(String userKeyword){
int wordLength = userKeyword.length();
int lengthCounter;
for (lengthCounter=0; lengthCounter<wordLength; lengthCounter++){
if (userKeyword.charAt(lengthCounter) !=
userKeyword.charAt(lengthCounter + 1)){
String revisedKeyword = "" + userKeyword.charAt(lengthCounter);
userKeyword = revisedKeyword;
}
}
return userKeyword;
}
Im really new to java, we havent used String builders, Strung buffer,,
Arrays, etc yet.... we havent even gotten to loops but i figured it ll be
the easiest way to use... Please help.