Reverse Prefix of Word

class Solution {
    public String reversePrefix(String word, char ch) {
        char[] c = word.toCharArray();int occurence = 0;int index = 0;
        //finding index of first occurence
        for(int i=0;i<c.length;i++){
            if(c[i]== ch){
                occurence = i;
                break;
            }
        }
        //reversing the string
        while(index<occurence){
            char temp = c[index];
            c[index]=c[occurence];
            c[occurence]=temp;
            index++;
            occurence--;
        }
        
    return String.valueOf(c);
    }
}