java计算30天后的日期源码

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class test {
 public static void main(String[] args) {
   Date date = new Date();
   System.out.println((new SimpleDateFormat("yyyy-MM-dd")).format(date));
  Calendar cal = Calendar.getInstance();
  cal.setTime(date);
  cal.add(Calendar.DATE, 30);
  System.out.println((new SimpleDateFormat("yyyy-MM-dd")).format(cal.getTime()));
}
}