Java date time manipulation

DateTime.java

public class DateTime {
  
    public void printFirstAndLastDayOfThisMonth() {
        Calendar calender = Calendar.getInstance();
        calender.roll(Calendar.MONTH, -1);
        System.out.println("Minimum date " + calender.getActualMinimum(Calendar.DATE));
        System.out.println("Maximum date " + calender.getActualMaximum(Calendar.DATE));
    }
  
    public void printFirstAndLastDayOfLastMonth() {
        Calendar calender = Calendar.getInstance();
        calender.roll(Calendar.MONTH, -1);
        System.out.println("Minimum date " + calender.getActualMinimum(Calendar.DATE));
        System.out.println("Maximum date " + calender.getActualMaximum(Calendar.DATE));
    }
}