How do you check a space in a string? [on hold]

Question

How do you detect space in a string? Here is my code, I tried to find the space as a char, but every 1 space, it adds 5 instead of 1. Can anyone explain it to me?

public static void main(String[] args) {

    Main main = new Main();

    String s = "HELLO WORLD";

    System.out.println("Vowel is = "+main.balancedSplitString(s));

}

public int balancedSplitString(String s) {

    char vowel[] = {'A', 'I', 'U', 'E', 'O'};
    int space = 0;
    int result = 0;

    for (int i = 0; i < s.length(); i++) {
        for (int j = 0; j < vowel.length; j++) {
            /*ignore this part
            if (s.charAt(i) == vowel[j]) {
                result++;
            }*/
            else if(s.charAt(i) == ' '){
                space++;
            }
        }
    }

    System.out.println("Space is = " + space);

    return result;
}

Answer 1

You have a nested for loop. For each iteration of the outer loop, the inner loop would have had 5 iterations, because there are five vowels. You can use the "step through" feature of your debugger to check this.

This means that for each value of i , the thing inside the inner for loop runs 5 times. When i reaches the index where the space is at, space++ is run 5 times because i never changes while the inner loop is looping.

To fix this, just move space++ outside of the inner for loop, but still inside the outer for loop:

for (int i = 0; i < s.length(); i++) {
    for (int j = 0; j < vowel.length; j++) {
        /*ignore this part
        if (s.charAt(i) == vowel[j]) {
            result++;
        }*/
    }
    if(s.charAt(i) == ' '){ // here!
        space++;
    }
}