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Q&A java.time.ZonedDateTime missing seconds in output

When printing a java.time.ZonedDateTime, it's missing the seconds in output, is it a bug or a feature? See my code: package tryNcry; import java.time.Instant; import java.time.ZoneId; import...

2 answers · posted 10mo ago by watchmaker‭ · edited 10mo ago by watchmaker‭

Question java datetime

#4: Post edited by

watchmaker‭ · 2025-11-16T21:15:05Z (10 months ago)
typo

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When printing a `java.time.ZonedDateTime`, it's missing the seconds in output, is it a bug or a feature?
See my code:
```java
package tryNcry;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;
public class TestOfTime {
public static void main(String[] args) {
Instant naked = Instant.parse("2000-01-01T12:00:01Z");
System.out.println(naked);
ZonedDateTime withTimeZone = naked.atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(withTimeZone);
long toSeconds = withTimeZone.toEpochSecond();
ZonedDateTime recreated = Instant.ofEpochSecond(toSeconds).atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(recreated);
recreated = Instant.ofEpochSecond(toSeconds - 1).atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(recreated);
// output:
// 2000-01-01T12:00:01Z
// 2000-01-01T23:00:01+11:00[Australia/Melbourne]
// 2000-01-01T23:00:01+11:00[Australia/Melbourne]
// 2000-01-01T23:00+11:00[Australia/Melbourne]
}
}
```
The last output skips the seconds. I would call it a (strange) feature if the minutes also would be skipped, but they are displayed.
What is it?
----
~~Tanks for the answers, in short it is:~~
* it is documented, so it is a feature, not a bug
* you can easily circumvent that feature by specifying explicitly what format you want to have

When printing a `java.time.ZonedDateTime`, it's missing the seconds in output, is it a bug or a feature?
See my code:
```java
package tryNcry;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;
public class TestOfTime {
public static void main(String[] args) {
Instant naked = Instant.parse("2000-01-01T12:00:01Z");
System.out.println(naked);
ZonedDateTime withTimeZone = naked.atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(withTimeZone);
long toSeconds = withTimeZone.toEpochSecond();
ZonedDateTime recreated = Instant.ofEpochSecond(toSeconds).atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(recreated);
recreated = Instant.ofEpochSecond(toSeconds - 1).atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(recreated);
// output:
// 2000-01-01T12:00:01Z
// 2000-01-01T23:00:01+11:00[Australia/Melbourne]
// 2000-01-01T23:00:01+11:00[Australia/Melbourne]
// 2000-01-01T23:00+11:00[Australia/Melbourne]
}
}
```
The last output skips the seconds. I would call it a (strange) feature if the minutes also would be skipped, but they are displayed.
What is it?
----
Thanks for the answers, in short it is:
* it is documented, so it is a feature, not a bug
* you can easily circumvent that feature by specifying explicitly what format you want to have

#3: Post edited by

watchmaker‭ · 2025-11-12T22:21:54Z (10 months ago)
short summerization of the answers

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When printing a `java.time.ZonedDateTime`, it's missing the seconds in output, is it a bug or a feature?
See my code:
```java
package tryNcry;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;
public class TestOfTime {
public static void main(String[] args) {
Instant naked = Instant.parse("2000-01-01T12:00:01Z");
System.out.println(naked);
ZonedDateTime withTimeZone = naked.atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(withTimeZone);
long toSeconds = withTimeZone.toEpochSecond();
ZonedDateTime recreated = Instant.ofEpochSecond(toSeconds).atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(recreated);
recreated = Instant.ofEpochSecond(toSeconds - 1).atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(recreated);
// output:
// 2000-01-01T12:00:01Z
// 2000-01-01T23:00:01+11:00[Australia/Melbourne]
// 2000-01-01T23:00:01+11:00[Australia/Melbourne]
// 2000-01-01T23:00+11:00[Australia/Melbourne]
}
}
```
The last output skips the seconds. I would call it a (strange) feature if the minutes also would be skipped, but they are displayed.
~~What is it?~~

When printing a `java.time.ZonedDateTime`, it's missing the seconds in output, is it a bug or a feature?
See my code:
```java
package tryNcry;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;
public class TestOfTime {
public static void main(String[] args) {
Instant naked = Instant.parse("2000-01-01T12:00:01Z");
System.out.println(naked);
ZonedDateTime withTimeZone = naked.atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(withTimeZone);
long toSeconds = withTimeZone.toEpochSecond();
ZonedDateTime recreated = Instant.ofEpochSecond(toSeconds).atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(recreated);
recreated = Instant.ofEpochSecond(toSeconds - 1).atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(recreated);
// output:
// 2000-01-01T12:00:01Z
// 2000-01-01T23:00:01+11:00[Australia/Melbourne]
// 2000-01-01T23:00:01+11:00[Australia/Melbourne]
// 2000-01-01T23:00+11:00[Australia/Melbourne]
}
}
```
The last output skips the seconds. I would call it a (strange) feature if the minutes also would be skipped, but they are displayed.
What is it?
----
Tanks for the answers, in short it is:
* it is documented, so it is a feature, not a bug
* you can easily circumvent that feature by specifying explicitly what format you want to have

#2: Post edited by

hkotsubo‭ · 2025-11-12T21:10:32Z (10 months ago)
added tag / minor fixes

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java.time.ZonedDateTime missing seconds in output

~~Java.time.ZonedDateTime missing seconds in output, is it a bug or a feature?~~
See my code:
~~```~~
package tryNcry;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;
public class TestOfTime {
public static void main(String[] args) {
Instant naked = Instant.parse("2000-01-01T12:00:01Z");
System.out.println(naked);
ZonedDateTime withTimeZone = naked.atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(withTimeZone);
long toSeconds = withTimeZone.toEpochSecond();
ZonedDateTime recreated = Instant.ofEpochSecond(toSeconds).atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(recreated);
recreated = Instant.ofEpochSecond(toSeconds - 1).atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(recreated);
// output:
// 2000-01-01T12:00:01Z
// 2000-01-01T23:00:01+11:00[Australia/Melbourne]
// 2000-01-01T23:00:01+11:00[Australia/Melbourne]
// 2000-01-01T23:00+11:00[Australia/Melbourne]
}
}
```
The last output skips the seconds. I would call it a (strange) feature if the minutes also would be skipped, but they are displayed.
What is it?

When printing a `java.time.ZonedDateTime`, it's missing the seconds in output, is it a bug or a feature?
See my code:
```java
package tryNcry;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;
public class TestOfTime {
public static void main(String[] args) {
Instant naked = Instant.parse("2000-01-01T12:00:01Z");
System.out.println(naked);
ZonedDateTime withTimeZone = naked.atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(withTimeZone);
long toSeconds = withTimeZone.toEpochSecond();
ZonedDateTime recreated = Instant.ofEpochSecond(toSeconds).atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(recreated);
recreated = Instant.ofEpochSecond(toSeconds - 1).atZone(ZoneId.of("Australia/Melbourne"));
System.out.println(recreated);
// output:
// 2000-01-01T12:00:01Z
// 2000-01-01T23:00:01+11:00[Australia/Melbourne]
// 2000-01-01T23:00:01+11:00[Australia/Melbourne]
// 2000-01-01T23:00+11:00[Australia/Melbourne]
}
}
```
The last output skips the seconds. I would call it a (strange) feature if the minutes also would be skipped, but they are displayed.
What is it?

java

java datetime

#1: Initial revision by

watchmaker‭ · 2025-11-11T05:59:17Z (10 months ago)

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java.time.ZonedDateTime missing seconds in output

Java.time.ZonedDateTime missing seconds in output, is it a bug or a feature?

See my code:
```
package tryNcry;

import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;

public class TestOfTime {

	public static void main(String[] args) {
		Instant naked = Instant.parse("2000-01-01T12:00:01Z");
		System.out.println(naked);
		ZonedDateTime withTimeZone = naked.atZone(ZoneId.of("Australia/Melbourne"));
		System.out.println(withTimeZone);

		long toSeconds = withTimeZone.toEpochSecond();
		ZonedDateTime recreated = Instant.ofEpochSecond(toSeconds).atZone(ZoneId.of("Australia/Melbourne"));
		System.out.println(recreated);
		recreated = Instant.ofEpochSecond(toSeconds - 1).atZone(ZoneId.of("Australia/Melbourne"));
		System.out.println(recreated);
// output:
//		2000-01-01T12:00:01Z
//		2000-01-01T23:00:01+11:00[Australia/Melbourne]
//		2000-01-01T23:00:01+11:00[Australia/Melbourne]
//		2000-01-01T23:00+11:00[Australia/Melbourne]		 
	}
}
```

The last output skips the seconds. I would call it a (strange) feature if the minutes also would be skipped, but they are displayed.

What is it?

java

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