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[Snippets] java date/time snippets #188

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Merged
Mathys-Gasnier merged 5 commits into quicksnip-dev:main from Mcbencrafter:main
Jan 7, 2025
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32 changes: 32 additions & 0 deletions snippets/java/date-time/date-time-formatting-american.md
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---
title: Date time formatting american
description: Formats a timestamp to a human-readable date-time string in the format "MM/dd/yyyy hh:mm:ss a"
author: Mcbencrafter
tags: date,time,date-time,formatting,american
---

```java
import java.time.Instant;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.concurrent.TimeUnit;

// using the system default time zone
public static String formatDateTimeAmerican(long time, TimeUnit timeUnit) {
return formatDateTimeAmerican(time, timeUnit, ZoneId.systemDefault());
}

public static String formatDateTimeAmerican(long time, TimeUnit timeUnit, ZoneId timeZone) {
return DateTimeFormatter.ofPattern("MM/dd/yyyy hh:mm:ss a")
.withZone(
timeZone != null ? timeZone : ZoneId.systemDefault()
)
.format(Instant.ofEpochSecond(
timeUnit.toSeconds(time)
));
}

// Usage:
System.out.println(formatDateTimeAmerican(1735689599, TimeUnit.SECONDS)); // "12/31/2024 | 11:59:59 PM" for GMT+0000
System.out.println(formatDateTimeAmerican(1735689599, TimeUnit.SECONDS, ZoneId.of("GMT+0000"))); // "12/31/2024 | 11:59:59 PM"
```
32 changes: 32 additions & 0 deletions snippets/java/date-time/date-time-formatting-european.md
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---
title: Date time formatting european
description: Formats a timestamp to a human-readable date-time string in the format "dd.MM.yyyy HH:mm:ss"
author: Mcbencrafter
tags: date,time,date-time,formatting,european
---

```java
import java.time.Instant;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.concurrent.TimeUnit;

// using the system default time zone
public static String formatDateTimeEuropean(long time, TimeUnit timeUnit) {
return formatDateTimeEuropean(time, timeUnit, ZoneId.systemDefault());
}

public static String formatDateTimeEuropean(long time, TimeUnit timeUnit, ZoneId timeZone) {
return DateTimeFormatter.ofPattern("dd.MM.yyyy HH:mm:ss")
.withZone(
timeZone != null ? timeZone : ZoneId.systemDefault()
)
.format(Instant.ofEpochSecond(
timeUnit.toSeconds(time)
));
}

// Usage:
System.out.println(formatDateTimeEuropean(1735689599, TimeUnit.SECONDS)); // "31.12.2024 | 23:59:59" for GMT+0000
System.out.println(formatDateTimeEuropean(1735689599, TimeUnit.SECONDS, ZoneId.of("GMT+0000"))); // "31.12.2024 | 23:59:59"
```
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---
title: Duration formatting hours minutes seconds
description: Converts a given time duration to a human-readable string in the format "hh:mm(:ss)"
author: Mcbencrafter
tags: time,formatting,hours,minutes,seconds
---

```java
import java.util.concurrent.TimeUnit;

public static String formatDurationToHoursMinutesAndSeconds(int time, TimeUnit timeUnit, boolean showSeconds) {
long totalSeconds = timeUnit.toSeconds(time);

if (totalSeconds < 0)
throw new IllegalArgumentException("Duration must be a non-negative value.");

// These variables can be directly used in the return statement,
// but are kept as separate variables here for better readability.
long hours = totalSeconds / 3600;
long minutes = (totalSeconds % 3600) / 60;
long seconds = totalSeconds % 60;

if (showSeconds) {
return String.format("%02d:%02d:%02d", hours, minutes, seconds);
} else {
return String.format("%02d:%02d", hours, minutes);
}
}

// Usage:
System.out.println(formatDurationToHoursMinutesAndSeconds(3810, TimeUnit.SECONDS, true)); // "01:03:30"
System.out.println(formatDurationToHoursMinutesAndSeconds(3810, TimeUnit.SECONDS, false)); // "01:03"
```
28 changes: 28 additions & 0 deletions snippets/java/date-time/duration-formatting-minutes-seconds.md
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---
title: Duration formatting minutes seconds
description: Converts a given time duration to a human-readable string in the format "mm:ss"
author: Mcbencrafter
tags: time,formatting,minutes,seconds
---

```java
import java.util.concurrent.TimeUnit;

public static String formatDurationToMinutesAndSeconds(int time, TimeUnit timeUnit) {
long totalSeconds = timeUnit.toSeconds(time);

if (totalSeconds < 0)
throw new IllegalArgumentException("Duration must be a non-negative value.");

// These variables can be directly used in the return statement,
// but are kept here as separate variables for better readability.
long minutes = totalSeconds / 60;
long seconds = totalSeconds % 60;

return String.format("%02d:%02d", minutes, seconds);
}

// Usage:
System.out.println(formatDurationToMinutesAndSeconds(120, TimeUnit.SECONDS)); // "02:00"
System.out.println(formatDurationToMinutesAndSeconds(75, TimeUnit.SECONDS)); // "01:15"
```
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