Add a char into a string at position x

Question

public String addLetter(char letter, int position, char[] word){
    char[]newWord = new char[word.length+1];

    if(position == 0){
        for(int i = position+1; i<word.length+1; i++){
            newWord[i] = word[i-1];
        }
        newWord[position] = letter;
    }else{

    }
    return new String(newWord);
}

I'm trying to create a method where it adds an letter to a string, then returns it. So far I've been able to add a character at the front of the string, but I'm not quite sure how to do that in the middle/end. Inside the if-condition I'm pushing every letter a slot behind, so there's room for the new letter in the front. However I don't know what to do if I'm gonna add something in the middle, any tips?

Answer 1

You can make something like below :

Convert your char array to string

   String b = new String("Tutorial");

then create StringBuilder

   StringBuilder str = new StringBuilder(b);
   System.out.println("string = " + str);

   // insert character at offset 8
   str.insert(8, 's');

   // print StringBuilder after insertion
   System.out.print("After insertion = ");
   System.out.println(str.toString());// this will print Tutorials

Answer 2

You could go this way too:

public String addLetter(char letter, int position, char[] word) {
    return new StringBuilder(new String(word)).insert(position, letter).toString();
}

Answer 3

You could do something like this:

string = string.substring(0,x) + "c" + string.substring(x, string.length());