Calendar.java

public class Calendar {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		if(args.length != 1) {
			System.out.println("Usage: LetterGrade <numeric-score>");
			return;
		}
		
        int month = Integer.parseInt(args[0]);
        switch(month){
        	case 1 : System.out.println("January");break;
        	case 2 : System.out.println("February");break;
        	case 3 : System.out.println("March");break;
        	case 4 : System.out.println("April");break;
        	case 5 : System.out.println("May");break;
        	case 6 : System.out.println("June");break;
        	case 7 : System.out.println("July");break;
        	case 8 : System.out.println("August");break;
        	case 9 : System.out.println("September");break;
        	case 10 : System.out.println("October");break;
        	case 11 : System.out.println("November");break;
        	case 12 : System.out.println("December");break;
        	default : System.out.println("Invalid input");break;
                }
	}
}