Java Timestamp setNanos() Method

The setNanos() method of Timestamp class sets a nanos value for the specified integer value.

Syntax

Parameters

Here the parameter 'n' represents the fractional seconds component.

Throws

The setNanos() method of Timestamp class throws:

IllegalArgumentException- if the given argument is less than 0 and greater than 999999999

Example 1

import java.sql.Timestamp;
public class JavaTimestampSetNanosExample1 {
    public static void main(String[] args) {
        Timestamp ts1 = Timestamp.valueOf("2018-09-01 09:01:15");
        System.out.println("Timestamp : " + ts1);
       // sets nanos value for the specified integer value.
         ts1.setNanos(54647);
        System.out.println("Timestamp after setting nanos : " + ts1);
    }
}

Test it Now

Output:

Timestamp : 2018-09-01 09:01:15.0
Timestamp after setting nanos : 2018-09-01 09:01:15.000054647

Example 2

import java.sql.Timestamp;
public class JavaTimestampSetNanosExample2 {
    public static void main(String[] args) {
        Timestamp ts1 = Timestamp.valueOf("2018-09-01 09:01:15");
        System.out.println("Timestamp : " + ts1);
        // sets nanos value for the specified integer value.
        ts1.setNanos(-5);
        System.out.println("Timestamp after setting nanos : " + ts1);
    }
}

Test it Now

Output:

Exception in thread "main" Timestamp : 2018-09-01 09:01:15.0
java.lang.IllegalArgumentException: nanos > 999999999 or < 0
	at java.sql.Timestamp.setNanos(Timestamp.java:389)
	at JavaTimestampSetNanosExample2.main(JavaTimestampSetNanosExample2.java:7)

An runtime exception IllegalArgumentException is thrown if the given argument is less than 0 and greater than 999999999

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