DayCount.java

public class DayCount{
 public static void main(String[] args){
 if(args.length != 2){
 System.out.println("Usage: dayCount <monthNum yearNum>");
 return;
 }
 int month = Integer.parseInt(args[0]);
 int year = Integer.parseInt(args[1]);
 int days = 0;
 switch(month){
 case 1:
 case 3:
 case 5:
 case 7:
 case 8:
 case 10:
 case 12:
 days = 31;
 break;
 case 4:
 case 6:
 case 9: 
 case 11:
 days = 30;
 break; 
 case 2:
 switch(year%4){
 case 0:
 days = 29;
 break;
 default:
 days = 28;
 break;
 }
 break;
 default:
 System.out.println("Tanggal Tidak Valid");
 break; 
 }
 System.out.println("Jumlah hari adalah " + days + " hari");
 }
}