Java:如何编写使用布尔值和字符串仅识别大写字母的程序

public class UpperCaseRecognition {
    public static void main(String[] args) {
        String input = "Hello World";
        boolean hasUpperCase = false;

        for (int i = 0; i < input.length(); i++) {
            char c = input.charAt(i);
            if (Character.isUpperCase(c)) {
                hasUpperCase = true;
                break;
            }
        }

        if (hasUpperCase) {
            System.out.println("The input string contains uppercase letters.");
        } else {
            System.out.println("The input string does not contain uppercase letters.");
        }
    }
}