Java Calendar method set() to set or update field values of a Calendar object

Date

Calendar.set(field, int value) Assign the values to fields
field: Required fields of Calendar like YEAR, MONTH, DAY_OF_MONTH, HOUR, MINUTE, and SECOND
value: Required , the value to be set for the given field.

Examples with output
Let us create one calendar object and we update a new Year value to it.

package my_proj;
 
import java.util.Calendar;
 
public class my_first {
public static void main(String[] args) {

Calendar my_cal = Calendar.getInstance();// created calendar 

System.out.println(my_cal.getTime());//
my_cal.set(Calendar.YEAR,2025); // Update the year
System.out.println(my_cal.getTime());//
}
}

Output is here

Tue Mar 03 15:47:11 IST 2020
Mon Mar 03 15:47:11 IST 2025

Adding year, month , date , hour , minutes, seconds

Calendar my_cal_d1 = Calendar.getInstance();// created calendar 
my_cal_d1.set(2020,2,25,10,10,20);
System.out.println( my_cal_d1.getTime());

Output is here

Wed Mar 25 10:10:20 IST 2020

Updating other field values

We will update all other fields

package my_proj;
 
import java.util.Calendar;
 
public class my_first {
public static void main(String[] args) {

Calendar my_cal = Calendar.getInstance();// created calendar 

System.out.println(my_cal.getTime());//
my_cal.set(Calendar.YEAR,2025); 
my_cal.set(Calendar.MONTH,8); 
my_cal.set(Calendar.DAY_OF_MONTH,26);
my_cal.set(Calendar.HOUR,22);
my_cal.set(Calendar.MINUTE,55);
my_cal.set(Calendar.SECOND,52);
System.out.println(my_cal.getTime());

}
}

Output is here

Tue Mar 03 16:24:02 IST 2020
Sat Sep 27 10:55:52 IST 2025

Using clear()

We can reset all field values by using clear(). Add this code before the last line.

my_cal.clear();
System.out.println(my_cal.getTime());

Output ( Complete ) is here

Tue Mar 03 16:30:06 IST 2020
Thu Jan 01 00:00:00 IST 1970

clear() Date & time tutorials

after() before() add() Java - Tutorials

Calendar.set()

Updating other field values

Using clear()

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