返回给定字符串中重复次数最多的字符

Question

I need help finding the error. The practice problem asks to return the most common character from a given string.

The error I receive is: String index out of range: 4

    for (int i=0; i<input.length(); i++){
        // code
        for (int j=0; j<input.length(); i++){
            //code
            }
        }       

Answer 1

In your second for loop you are incrementing the variable i instead of j . You should do this :

for(int j = 0; j < input.length(); j++)