public class Stringer {
    public static void main(String[] args) {
        String[] arrayOfStrings = { "hello", "this", "is", "a", "test" };
        for (int i = 0; i < arrayOfStrings.length; i++) {
            System.out.print(arrayOfStrings[i].charAt(0));
        }
        System.out.println();
        System.out.println();
        for (int i = 0; i < arrayOfStrings.length; i++) {
            for (int j = 0; j < arrayOfStrings.length; j++) {
                System.out.print(arrayOfStrings[i].compareTo(arrayOfStrings[j]) + "  ");
            }
            System.out.println();
        }
    }
    
    public static void main2(String[] args) {
        String aa = null;
        System.out.println(aa.charAt(0));
    }
}