Java/Postgresql get next X days -

public date getcurrentday() {     calendar cal = calendar.getinstance();     date date = java.sql.date.valueof(              cal.get(cal.year) + ":" +              cal.get(cal.month) + ":" +              cal.get(cal.date) );     return date; } 

i need make database query client says wants info of next 3 days, here method getting current day, can todays info, when client wants next 3 days, how can make query. how next x days?

if client in java, can make helper method days ahead of current time.:

public date getdaysaheadcurrentdate(int numberofdaysahead) {     if (numberofdaysahead <= 0) {         throw new illegalargumentexception("the number of days ahead must positive integer.");     }     calendar cal = calendar.getinstance();     // add number of days before creating java.sql.date instance.     cal.add(calendar.date, numberofdaysahead);     date date = java.sql.date.valueof(              cal.get(calendar.year) + ":" +              cal.get(calendar.month) + ":" +              cal.get(calendar.date) );     return date; }