Using the GregorianCalendar Class - Java Date Time

Java examples for Date Time:Calendar

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Description

Using the GregorianCalendar Class

Demo Code

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

public class Main {
  public static void main(String[] args) {
    GregorianCalendar gc = new GregorianCalendar();
    System.out.println("Current Date: " + getStr(gc));

    // Add 1 year 
    gc.add(Calendar.YEAR, 1);        
    System.out.println("After adding a year: " + getStr(gc));

    // Add 15 days
    gc.add(Calendar.DATE, 15);        
    System.out.println("After adding 15 days: " + getStr(gc));

    long millis = gc.getTimeInMillis();
    Date dt = gc.getTime();//from ww  w  . j a  v a  2  s .c  om
    System.out.println("Time in millis: " + millis);
    System.out.println("Time as Date: " + dt);
  }
    
  public static String getStr(GregorianCalendar gc) {
    int day = gc.get(Calendar.DAY_OF_MONTH);
    int month = gc.get(Calendar.MONTH);
    int year = gc.get(Calendar.YEAR);
    int hour = gc.get(Calendar.HOUR);
    int minute = gc.get(Calendar.MINUTE);
    int second = gc.get(Calendar.SECOND);

    String str = day + "/" + (month + 1) + "/" + year + " " + 
                 hour + ":" + minute + ":" + second;
    return str;
  }
}

Result


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