Easiest Solution in Java
Code
# Code
```java []
class Solution {
    public boolean isBalanced(String num) {
        int oddSum = 0, evenSum = 0, len = num.length();
        for (int i = 0; i < len; i++) {
            if (i % 2 == 0)
                evenSum += (num.charAt(i) - '0');
            else
                oddSum += (num.charAt(i) - '0');
        }
        return oddSum == evenSum;
    }
}
```
['String', 'Java']