Java processing date time add minus

Java Processing Date- time add-minus Java processing date time common methods:1The . Java.util.CalendarCalendar class is an abstract class that provides methods for converting a particular moment to a set of calendar fields such as year, MONTH, Day_of_month, HOUR, and so on. and provides some methods for manipulating calendar fields, such as getting the date of the next week. A millisecond value can be expressed instantaneously, which is the distance from the calendar element (Greenwich Mean Time1970Years1Month1Day'sxx:xx:00.000, the Gregorian calendar) offset. Example: Java code1. Calendar cal = Calendar.getinstance ();//get a calendar using the default time zone and locale. 2. Cal.add (Calendar.day_of_month,-1);//the day before the current date is taken. 3. 4. Cal.add (Calendar.day_of_month, +1);//the day after which the current date is taken. 5. 6.//format output date by7. Java.text.SimpleDateFormat format =NewJava.text.SimpleDateFormat ("YYYY-MM-DD"); 8. 9. System. out. println ("Today is:"+Format.format (Calendar.getinstance (). GetTime ())); Ten.  One. System. out. println ("Yesterday is:"+Format.format (Cal.gettime ())); Get- A-25th Issue: Java code1. Calendar Calendar =NewGregorianCalendar ( -, One, -,0,0,0); 2. Date Date =Calendar.gettime (); 3. System. out. println ("Christmas is:"+Format.format (date)); The Java month is from 0- One, the month is set to minus 1. GregorianCalendar constructor method parameters are: year, month-1, day, time, minute, second. Part of date taken: Java code1.intYear =calendar.Get(calendar.year); 2. 3.intMonth=calendar.Get(Calendar.month) +1; 4. 5.intDay =calendar.Get(Calendar.day_of_month); 6. 7.intHour =calendar.Get(Calendar.hour_of_day); 8. 9.intMinute =calendar.Get(Calendar.minute); Ten.  One.intSeconds =calendar.Get(Calendar.second); Take the month to add 1. Determine the maximum number of days in the current month: Java code1. Calendar cal =calendar.getinstance (); 2.intday=Cal.getactualmaximum (Calendar.day_of_month); 3. System. out. println (day);2. Java.util.DateJava Code1. Java.util.Date today=Newjava.util.Date (); 2. System. out. println ("Today is"+Formats.format (today)); Take the first day of the month: Java code1. Java.text.SimpleDateFormat format =NewJava.text.SimpleDateFormat ("yyyy-mm-01"); 2. Java.util.Date firstday=Newjava.util.Date (); 3. System. out. println ("The month first day is"+Formats.format (FirstDay)); Take the last day of the month: Java code1. 2. Calendar cal =calendar.getinstance (); 3.intmaxday=Cals.getactualmaximum (Calendar.day_of_month); 4. Java.text.Format formatter3=NewJava.text.SimpleDateFormat ("yyyy-mm-"+maxday); 5. System. out. println (Formatter3.format (Cal.gettime ())); Find the number of days between two dates: Java code1. Java.text.SimpleDateFormat format =NewJava.text.SimpleDateFormat ("YYYY-MM-DD"); 2. Java.util.Date begindate= Format.parse ("2007-12-24"); 3. Java.util.Date enddate= Format.parse ("2007-12-25"); 4.LongDay= (Date.gettime ()-mydate.gettime ())/( -* -* -* +); 5. System. out. println ("number of days apart ="+Day ); A year ago Date: Java code1. Java.text.Format formatter=NewJava.text.SimpleDateFormat ("YYYY-MM-DD"); 2. Java.util.Date todaydate=Newjava.util.Date (); 3.LongBeforetime= (Todaydate.gettime ()/ +)- -* -* -*365; 4. Todaydate.settime (beforetime* +); 5. String beforedate=Formatter.format (todaydate); 6. System. out. println (beforedate); date after one year: Java code1. Java.text.Format formatter=NewJava.text.SimpleDateFormat ("YYYY-MM-DD"); 2. Java.util.Date todaydate=Newjava.util.Date (); 3.LongAftertime= (Todaydate.gettime ()/ +)+ -* -* -*365; 4. Todaydate.settime (aftertime* +); 5. String afterdate=Formatter.format (todaydate); 6. System. out. println (afterdate); 10 hours after the Java code1. Java.util.Calendar cal=java.util.Calendar.getInstance (); 2.   Cal.settime (Dateoper); 3. Cal.add (Java.util.Calendar.HOUR_OF_DAY,Ten); 4. System. out. println ("Date:"+Forma.format (Cal.gettime ())); 10 hours before the time Java code1. Java.util.Calendar cal=java.util.Calendar.getInstance (); 2.   Cal.settime (Dateoper); 3. Cal.add (java.util.calendar.hour_of_day,-Ten); 4. System. out. println ("Date:"+Forma.format (Cal.gettime ())); 3. Java.sql.Date inherits from Java.util.Date, is the date type Java code used to manipulate the database1. Java.sql.Date sqldate =NewJava.sql.Date (Java.sql.Date.valueOf ("2007-12-25"). GetTime ()); Date Comparison: A simple comparison can be directly compared as a string, or you can use Java.sql.Date.valueOf ("2007-03-08"). CompareTo (Java.sql.Date.valueOf ("2007-03-18") method to compare the size of the date. You can also use Java.util.Date.after (java.util.Date) to compare. Time difference:LongDifference=c2.gettimeinmillis ()-C1.gettimeinmillis (); Days of difference:Longday=difference/(3600* -* +) Difference Hour:Longhour=difference/(3600* +) Difference minutes:Longminute=difference/( -* +) Difference seconds:Longsecond=difference/ +Supplemental: Java code1. DateFormat df=NewSimpleDateFormat ("yyyy-mm-dd EE hh:mm:ss"); 2. System. out. println (Df.format (NewDate ())); 3. Date Date =NewDate (); 4. DateFormat shortdate=dateformat.getdatetimeinstance (Dateformat.short, Dateformat.short); 5. DateFormat mediumdate =dateformat.getdatetimeinstance (Dateformat.medium, Dateformat.medium); 6. DateFormat longdate =dateformat.getdatetimeinstance (Dateformat.long, Dateformat.long); 7. DateFormat fulldate =dateformat.getdatetimeinstance (Dateformat.full, dateformat.full); 8. 9. System. out. println (Shortdate.format (date)); Ten. System. out. println (Mediumdate.format (date));  One. System. out. println (Longdate.format (date));  A. System. out. println (Fulldate.format (date));  -.  -. ,-4- thePM 3: -    the. --4- the  the: -: to    -. April 15, 2008 03:24 P.M. 31 seconds -. April 15, 2008 Tuesday 03:24 P.M. 31 sec CST -.  +.  -. Calendar C =calendar.getinstance ();  +.  A. C.add (Calendar.month,1);//The current time plus 1 months at. System. out. println (Df.format (C.gettime ()));  -.  -. C.add (Calendar.hour,3);//The current time plus 3 hours -. System. out. println (Df.format (C.gettime ()));  -.  -. C.add (Calendar.year,-2);//It's now minus 2 years . in. System. out. println (Df.format (C.gettime ()));  -.  to. C.add (Calendar.day_of_week,7);//the current time plus 7 days +. System. out. println (Df.format (C.gettime ()));

Java Processing Date-time add-subtract