Java current date pro

Add or subtract days to current date

import java.util.Calendar;

public class AddDaysToCurrentDate

          {

public static void main(String[] args)

{

Calendar now = Calendar.getInstance();

System.out.println("Current date : " + (now.get(Calendar.Month) + 1)

+ "-"

+ now.get(Calendar.Date)

+ "-"

+ now.get(Calendar.Year));

now.add(Calendar.Date,1);

System.out.println("date after one day : " + (now.get(Calendar.Month) + 1)

+ "-"

+ now.get(Calendar.Date)

+ "-"

+ now.get(Calendar.Year));

now = Calendar.getInstance();

now.add(Calendar.Date, -10);

System.out.println("date before 10 days:"+(now.get(Calendar.Month) + 1)

+ "-"

+ now.get(Calendar.Date)

+ "-"

+ now.get(Calendar.Year));

  }

}

Add or subtract hours to current time

import java.util.Calendar;

public class AddHoursToCurrentDate

{

public static void main(String[] args)

{

Calendar now = Calendar.getInstance();

System.out.println("Current Date : " + (now.get(Calendar.Month) + 1)

+ "-"

+ now.get(Calendar.Date)

+ "-"

+ now.get(Calendar.Year));

System.out.println("Current time : " + now.get(Calendar.Hour_Of_Day)

+ ":"

+ now.get(Calendar.Minute)

+ ":"

+ now.get(Calendar.Second));

now.add(Calendar.Hour,10);

System.out.println("New time after adding 10 hours : "

+ now.get(Calendar.Hour_Of_Day)

+ ":"

+ now.get(Calendar.Minute)

+ ":"

+ now.get(Calendar.Second));

System.out.println("New date after adding 10 hours : "

+ (now.get(Calendar.Month) + 1)

+ "-"

+ now.get(Calendar.Date)

+ "-"

+ now.get(Calendar.Year));

now = Calendar.getInstance();

now.add(Calendar.Hour, -3);

System.out.println("Time before 3 hours : " + now.get(Calendar.Hour_Of_Day)

+ ":"

+ now.get(Calendar.Minute)

+ ":"

+ now.get(Calendar.Second));

  }

}

Add or subtract minutes to current time

import java.util.Calendar;

public class AddMinutesToCurrentDate

{

public static void main(String[] args)

{

Calendar now = Calendar.getInstance();

System.out.println("Current time : " + now.get(Calendar.Hour_Of_Day)

+ ":"

+ now.get(Calendar.Minute)

+ ":"

+ now.get(Calendar.Second));

now.add(Calendar.Minute,20);

System.out.println("New time after adding 20 minutes : "

+ now.get(Calendar.Hour_Of_Day)

+ ":"

+ now.get(Calendar.Minute)

+ ":"

+ now.get(Calendar.Second));

now = Calendar.getInstance();

now.add(Calendar.Minute, -50);

System.out.println("Time before 50 minutes : " + now.get(Calendar.Hour_Of_Day)

+ ":"

+ now.get(Calendar.Minute)

+ ":"

+ now.get(Calendar.Second));

    }

}

Add or subtract months to current date

import java.util.Calendar;

public class AddMonthsToCurrentDate

{

public static void main(String[] args)

{

Calendar now = Calendar.getInstance();

System.out.println("Current date : " + (now.get(Calendar.Month) + 1)

+ "-"

+ now.get(Calendar.Date)

+ "-"

+ now.get(Calendar.Year));

now.add(Calendar.Month,10);

System.out.println("date after 10 months : " + (now.get(Calendar.Month) + 1)

+ "-"

+ now.get(Calendar.Date)

+ "-"

+ now.get(Calendar.Year));

 now = Calendar.getInstance();

now.add(Calendar.Month, -5);

System.out.println("date before 5 months : " + (now.get(Calendar.Month) + 1)

+ "-"

+ now.get(Calendar.Date)

+ "-"

+ now.get(Calendar.Year));

    }

}

Add or subtract seconds to current time

import java.util.Calendar;

public class AddSecondsToCurrentDate

         {

public static void main(String[] args)

{

Calendar now = Calendar.getInstance();

 System.out.println("Current time : " + now.get(Calendar.Hour_Of_Day)

+ ":"

+ now.get(Calendar.Minute)

+ ":"

+ now.get(Calendar.Second));

now.add(Calendar.Second,100);

System.out.println("New time after adding 100 seconds : "

+ now.get(Calendar.Hour_Of_Day)

+ ":"

+ now.get(Calendar.Minute)

+ ":"

+ now.get(Calendar.Second));

now = Calendar.getInstance();

now.add(Calendar.Second, -50);

System.out.println("Time before 50 minutes : " + now.get(Calendar.Hour_Of_Day)

+ ":"

+ now.get(Calendar.Minute)

+ ":"

+ now.get(Calendar.Second));

   }

}

Add or subtract weeks to current date

import java.util.Calendar;

public class AddWeeksToCurrentWeek

{

public static void main(String[] args)

{

Calendar now = Calendar.getInstance();

System.out.println("Current date : " + (now.get(Calendar.Month) + 1)

+ "-"

+ now.get(Calendar.Date)

+ "-"

+ now.get(Calendar.Year));

                      

System.out.println("Current week of month is : " +

now.get(Calendar.Week_Of_Month));

System.out.println("Current week of year is : " +

now.get(Calendar.Week_Of_Year));

now.add(Calendar.Week_Of_Year,1);

   

System.out.println("date after one week :"+(now.get(Calendar.Month)+ 1)

+ "-"

+ now.get(Calendar.Date)

+ "-"

+ now.get(Calendar.Year));

now =Calendar.getInstance();

now.add(Calendar.Week_Of_Year,-50);

        System.out.println("date before 50 weeks:"+(now.get(Calendar.Month)+ 1)

+ "-"

+ now.get(Calendar.Date)

+ "-"

+ now.get(Calendar.Year));

   }

}