class Array {
public static void main(String args[]){
int month_day[];
month_days = new int[12];
month_day[0] = 31;
month_day[1] = 28;
month_day[2] = 31;
month_day[3] = 30;
month_day[4] = 31;
month_day[5] = 30;
month_day[6] = 31;
month_day[7] = 31;
month_day[8] = 30;
month_day[9] = 31;
month_day[10] = 30;
month_day[11] = 31;
System.out.println("April has " + month_day[3] + " days.");
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C:\>java Array
April has 30 days.