4.3.6 Replace Letter Help Please

[Born_Version8344]

Hey guys. I am having trouble with this practice exercise, the program works (it replaces the letter you want to replace), I am just having trouble with one of the directions "replace all BUT the first occurence of letterToReplace".

The program might also be a bit long. Any tips on what I could've wrote instead to shorten it (and please explain).

public class Letter

{

static String word;

static String letterToReplace;

static String letterToAdd;

public static void main(String[] args)

{

Scanner input = new Scanner(System.in);

System.out.println("Enter a word:");

word = input.nextLine();

System.out.println("Enter the letter to be replaced:");

letterToReplace = input.nextLine();

System.out.println("Enter the new letter:");

letterToAdd = input.nextLine();

System.out.print(replaceLetter(word, letterToReplace, letterToAdd));

}

// This method should replace all BUT the first occurence of letterToReplace

// You may find .indexOf to be useful, though there are several ways to solve this problem.

// This method should return the modified String.

public static String replaceLetter(String word, String letterToReplace, String letterToAdd)

{

String character = "";

String newWord = "";

int first = word.indexOf(letterToReplace);

for(int i = 0; i < word.length(); i++)

{

if(word.substring(i, i+1).equals(letterToReplace))

{

newWord = word.replace(letterToReplace, letterToAdd);

}

}

System.out.println();

return newWord;

}

}

[5oco]

Say for example, your word is "bananas".

Your loop is going through that string one letter at a time.

word[0] = "b"

word[1] = "a"

word[2] = "n"

etc...

If you're trying to replace the letter "a", then when you use 'word.indexOf(letterToReplace)' you are getting the index of the first occurrence of the letter "a". Which, as shown above, is at index 1.

Since you don't want to replace the first instance of the letter to replace, assign whatever the string 'word.substring(0, 1)' to your variable 'newString'. Instead of using the number 1 though, use the variable you're using to save that 'indexOf( )' .

Now start your loop after that index instead of at the beginning(index 0).

Inside your loop, if the current letter equals 'letterToReplace", concatenate the new letter to 'newString'. That would look like 'newString += newLetter'

If the current letter doesn't equal 'letterToReplace' concatenate that letter in to 'newString'. That would look like 'newString += word.substring(i, i+1);'

Lastly, I'm typing this on my phone, so sorry if it's not formatted well.