added duration formatting

Author: Mcbencrafter

snippets/java/date-time/duration-formatting-hours-minutes-seconds.md

@@ -0,0 +1,39 @@
+---
+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: java, time, formatting, hours, minutes, seconds
+---
+
+```java
+package snippets.time;
+
+import java.util.concurrent.TimeUnit;
+
+public class DurationFormatterHoursMinutesSeconds {
+
+    public static void main(String[] args) {
+        System.out.println(formatDurationToHoursMinutesAndSeconds(3810, TimeUnit.SECONDS, true)); // "01:03:30"
+        System.out.println(formatDurationToHoursMinutesAndSeconds(3810, TimeUnit.SECONDS, false)); // "01:03"
+    }
+
+    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);
+        }
+    }
+}
+```

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: java, time, formatting, minutes, seconds
+---
+
+```java
+import java.util.concurrent.TimeUnit;
+
+class DurationFormatterMinutesSeconds {
+
+    public static void main(String[] args) {
+        System.out.println(formatDurationToMinutesAndSeconds(120, TimeUnit.SECONDS)); // "02:00"
+        System.out.println(formatDurationToMinutesAndSeconds(75, TimeUnit.SECONDS)); // "01:15"
+    }
+
+    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);
+    }
+}
+```