2000. Reverse Prefix of Word

class Solution {
    public String reversePrefix(String word, char ch) {
        int i=0,c=0;
        String s=String.valueOf(ch);
        if(!word.contains(s)) return word;//edge condition
        c=word.indexOf(ch);
        StringBuilder sb=new StringBuilder();
        for(i=c;i>=0;i--){
           sb.append(word.charAt(i)); 
        }
        for(i=c+1;i<word.length();i++){
            sb.append(word.charAt(i));
        }
        return sb.toString();
    }
}