Java Timestamp from() Method

The from() method of Timestamp class obtains an instance of Timestamp from an Instant object.

Syntax

Parameters

The parameter 'instant' represents the instant to convert.

Returns

The from() method of Timestamp class returns an Timestamp which represents the same point on the time-line as that of instant.

Throws

The from() method of Timestamp class throws :

NullPointerException- if the instance is null.

IllegalArgumentException-if the instant is too large to represent as a Timestamp

Example 1

import java.sql.Timestamp;
import java.time.Instant;
public class JavaTimestampFromExample1 {
    public static void main(String[] args) {
       Timestamp instant= Timestamp.from(Instant.now());
        System.out.println("from() method will return "+instant);
    }
}

Output:

from() method will return 2018-09-02 22:05:31.689

Example 2

import java.sql.Timestamp;
import java.time.Instant;
public class JavaTimestampFromExample2 {
    public static void main(String[] args) {
        Timestamp instant= Timestamp.from(Instant.ofEpochSecond(678));
        System.out.println("from() method will return "+instant);
    }
}

Output:

from() method will return 1970-01-01 05:41:18.0

Example 3

import java.sql.Timestamp;
public class JavaTimestampFromExample3 {
    public static void main(String[] args) {
        Timestamp instant= Timestamp.from(null);
        System.out.println("from() method will return "+instant);
    }
}

Output:

Exception in thread "main" java.lang.NullPointerException
	at java.sql.Timestamp.from(Timestamp.java:598)
	at com.javaTpoint.JavaTimestampFromExample3.main(JavaTimestampFromExample3.java:8)

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