package 數(shù)據(jù)類型;
class Array {
?public static void main(String args[]){
??int month_days[];
??month_days = new int[12];
??month_days[0] = 31;
??month_days[1] = 28;
??month_days[2] = 31;
??month_days[3] = 30;
??month_days[4] = 31;
??month_days[5] = 30;
??month_days[6] = 31;
??month_days[7] = 31;
??month_days[8] = 30;
??month_days[9] = 31;
??month_days[10] = 30;
??month_days[11] = 31;
??System.out.println("April has " + month_days[3] + " days.");
?}
}