public class Month {
public static void main(String[] args) {
String input = JOptionPane.showInputDialog(null, "please enter number of month");
if(Pattern.matches("([1-9]|1[012])", input)){
switch (Integer.parseInt(input)){
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;
}
}else{
System.out.println("input error!");
}
}
}