专门

public class Template {
public static void main(String []args) {
int[] months = null;
months = new Template().getMonths(3);
for(int month: months){
System.out.println("Hello World!===>" + month);
}
}
public int[] getMonths(int now){
int last1 = getPreviousMonth(now);
int last2 = getPreviousMonth(last1);
int last3 = getPreviousMonth(last2);
int[] months = {now,last1,last2,last3};
return months;
}
public int getPreviousMonth(int now){
if (now == 1) {
return 12;
}else{
return now - 1;
}
}

}