groovy

Incrementing a date in Groovy gets an incorrect date

In my Grails project I have a date in the controller and I need to increment this date by one month, so I did as below:

SimpleDateFormat sdf = new SimpleDateFormat("YYYY-MM-DD HH:MM:ss");
def temp
use (TimeCategory)
{
    temp=new Date()+30.days//current date 6-1-2016
}
println(sdf.format(temp))

this was the output:

2016-02-36

I tried plus(30) also giving me the same result. Is there a way to do this increment correctly?

Solution

  • In a Java date format, D stands for "Day in Year", hence 6+30 = 36. You want to use d for "Day in month".

    You are also using Y which is "Week year" instead of y which is "year" and M for minutes when you want m.

    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")