leetcode/detectCapital at master · aston-github/leetcode · GitHub

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class Solution {
    public boolean detectCapitalUse(String word) {
        String upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        String lower = "abcdefghijklmnopqrstuvwxyz";
        if (word.length() ==1){
            return true;
        }
        if (lower.contains(""+word.charAt(0))){
            for(int i = 1;i<word.length();i++){
                if (upper.contains(""+word.charAt(i))){
                    // System.out.print("HERE");
                    return false;
                }
            }
            return true;
        }
        else {
//             first letter cap and rest not
            if (lower.contains(""+word.charAt(1))){
                for(int i = 2;i<word.length();i++){
                if (upper.contains(""+word.charAt(i))){
                    // System.out.print("HERE");
                    return false;
                }
            }
            }
            else{
                for(int i = 1;i<word.length();i++){
                if (lower.contains(""+word.charAt(i))){
                    // System.out.print("HERE");
                    return false;
            }
        }
            }
        }
        return true;
    }
    }