My code works for when secretWord contain one 'guess', but it doesnt work for when secretWord contain 2 of the same guess. Example, it work for when guess is 'a', and secretWord is apple, but it doesnt work when guess is 'e', and secretWord is secret......which has 2 'e'

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public static String makeGuess(String guess, String secretWord, String disguisedWord) {

String newWord=disguisedWord;

if(secretWord.contains(guess)) {

int id=secretWord.indexOf(guess);

int m = guess.length();

String temp;

StringBuffer buf=new StringBuffer(disguisedWord);

buf.replace(id, id+m, guess);

newWord = new String(buf);

}

return newWord;

}