Here is my program, I tried
java.sql.Date logicalDate;
Calendar c = Calendar.getInstance();
c.setTime(logicalDate);
c.add(Calendar.DATE, 1);
try this :
Calendar cNow = Calendar.getInstance();
Date dNow = cNow.getTime();
cNow.add(Calendar.DATE, 7);
Date dSeven = cNow.getTime();
SimpleDateFormat format = new SimpleDateFormat("MMM dd, yyyy hh:mm:ss a");
String dateNow = format.format(dNow);
String dayBefore = format.format(dSeven);
System.out.println(dateNow);
System.out.println(daySeven); //here is your current day + 7
Date date = new Date();
System.out.println(date);