package lectures.java_basics_overview;
import util.annotations.WebDocuments;
@WebDocuments({"Lectures/JavaBasicsOverview.pptx", "Lectures/JavaBasicsOverview.pdf", "Videos/JavaBasicsOverview.avi"})
public class AnUpperCasePrinter {
    public static void main(String[] args) {
        if (args.length != 1) {
            System.out.println("Illegal number of arguments:" + args.length
                    + ". Terminating program.");
            System.exit(-1);
        }
        String scannedString = args[0];
        System.out.println("Upper Case Letters:");
        int index = 0;
        while (index < scannedString.length()) {
            char nextLetter = scannedString.charAt(index);
            if (nextLetter >= 'A' && nextLetter <= 'Z')
                System.out.print(nextLetter);
            index++;
        }
        System.out.println();
    }
}