diff --git a/LoadingBar.java b/LoadingBar.java
index 871e05a..74eb378 100644
--- a/LoadingBar.java
+++ b/LoadingBar.java
@@ -9,21 +9,24 @@ import java.util.concurrent.TimeUnit;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
-class LoadingBar {
+public class LoadingBar {
 
    private static final String TIME_FORMAT = "HH:mm";
    private static final DateTimeFormatter TIME_FORMATTER = DateTimeFormatter.ofPattern(TIME_FORMAT);
-   private static final Pattern TIME_PATTERN = Pattern.compile("(?>[01][0-9]|2[0-4]):[0-5][0-9]");
+   private static final Pattern TIME_PATTERN = Pattern.compile("(?>[01]\\d|2[0-4]):[0-5]\\d");
    private static final Pattern LUNCH_DURATION_PATTERN = Pattern.compile("\\d+");
-   private static final Pattern OFFSET_PATTERN = Pattern.compile("[\\+\\-]\\d+");
+   private static final Pattern OFFSET_PATTERN = Pattern.compile("[+-]\\d+");
    private static final DecimalFormat PERCENTAGE_FORMAT = new DecimalFormat("00.00");
    private static final int MIN_LUNCH_DURATION = 30;
    private static final LocalTime LATEST_LUNCH_TIME = LocalTime.of(13, 30);
-   private static final int DEFAULT_NUMBER_WORK_MINS_BEFORE_LUNCH = 5 * 60;
+   private static final long DEFAULT_NUMBER_WORK_MINS_BEFORE_LUNCH = 5L * 60;
    private static final int MAX_NUMBER_WORK_MINS_WITHOUT_LUNCH = 6 * 60;
-   private static final int MAX_NUMBER_WORK_MINS = 8 * 60;
+   private static final long MAX_NUMBER_WORK_MINS = 8L * 60;
+   private static final int MINS_PER_HOUR = 60;
+   private static final int LINE_LENGTH = 100;
 
-   private static enum DaySection {
+
+   private enum DaySection {
       MITTAG("-m", "Mittag"),
       ZAPFENSTREICH("-z", "Zapfenstreich");
 
@@ -31,7 +34,7 @@ class LoadingBar {
       private final String description;
 
 
-      private DaySection(String param, String description) {
+      DaySection(String param, String description) {
          this.param = param;
          this.description = description;
       }
@@ -92,7 +95,7 @@ class LoadingBar {
    private static void handleZapfenstreich(String[] args, LocalTime startTime) {
       Integer lunchDuration = null;
       if (args.length == 2) {
-         showLoadingBarZapfenstreich(startTime, lunchDuration);
+         showLoadingBarZapfenstreich(startTime);
          return;
       }
       String nextArg = args[2];
@@ -162,8 +165,8 @@ class LoadingBar {
       if (pattern.matcher(param).matches()) {
          return;
       } // FSFIXME fine tune message -> HH:mm, mm, -+mm
-      var firstInputPart = timeInput ? "Uhrzeitformat ("+ TIME_FORMAT + ")" : "Minutenanzahl (" + LUNCH_DURATION_PATTERN + ")";
-      var possibleTimeInputPart = !timeInput && timeInputPossible ? " oder Uhrzeitformat ("+ TIME_FORMAT + ")" : "";
+      var firstInputPart = timeInput ? "Uhrzeitformat (" + TIME_FORMAT + ")" : "Minutenanzahl (" + LUNCH_DURATION_PATTERN + ")";
+      var possibleTimeInputPart = !timeInput && timeInputPossible ? " oder Uhrzeitformat (" + TIME_FORMAT + ")" : "";
       System.out.println(errMsgPrefix + " \"" + param + "\" muss " + firstInputPart + possibleTimeInputPart + " entsprechen.");
       System.exit(1);
    }
@@ -174,7 +177,7 @@ class LoadingBar {
          return;
       }
       List<String> sectionDescs = Arrays.stream(DaySection.values()).map((DaySection ds) -> ds.getDescription() + " (" + ds.getParam() + ")")
-            .collect(Collectors.toList());
+          .collect(Collectors.toList());
       String sectionDescsJoined = String.join(" oder ", sectionDescs);
       System.out.println("Argument nach Startzeit \"" + param + "\" muss Angabe für " + sectionDescsJoined + " sein.");
       System.exit(1);
@@ -183,32 +186,32 @@ class LoadingBar {
 
    private static void printHelp() {
       System.out.println("Mögliche Argumente für LoadingBar:\n"
-            + "Normalfall Vormittag (Mittagspause <= " + LATEST_LUNCH_TIME + ")\n"
-            + TIME_FORMAT + " " + DaySection.MITTAG.getParam() + "\n"
-            + "Vormittag mit expliziter Mittagspause (<= " + LATEST_LUNCH_TIME + ")\n"
-            + TIME_FORMAT + " " + DaySection.MITTAG.getParam() + " " + TIME_FORMAT + "\n"
-            + "Vormittag mit abweichender Minutenanzahl Arbeitszeit\n"
-            + TIME_FORMAT + " " + DaySection.MITTAG.getParam() + " -+mm\n"
-            + "Normalfall Nachmittag (Mittagspause " + MIN_LUNCH_DURATION + " min)\n"
-            + TIME_FORMAT + " " + DaySection.ZAPFENSTREICH.getParam() + "\n"
-            + "Nachmittag mit expliziter Länge Mittagspause (Mittagspause unter " + MIN_LUNCH_DURATION + " min wird auf " + MIN_LUNCH_DURATION + " min korrigiert)\n"
-            + TIME_FORMAT + " " + DaySection.ZAPFENSTREICH.getParam() + " mm\n"
-            + "Nachmittag mit explizitem Feierabend (Mittagspause je nach Minimum (s.u.))\n"
-            + TIME_FORMAT + " " + DaySection.ZAPFENSTREICH.getParam() + " " + TIME_FORMAT + "\n"
-            + "Nachmittag mit abweichender Minutenanzahl Arbeitszeit\n"
-            + TIME_FORMAT + " " + DaySection.ZAPFENSTREICH.getParam() + " -+mm\n"
-            + "Nachmittag mit explizitem Feierabend u. expliziter Länge Mittagspause (Mittagspause unter Minimum (s.u.) wird auf Minimum korrigiert)\n"
-            + TIME_FORMAT + " " + DaySection.ZAPFENSTREICH.getParam() + " mm " + TIME_FORMAT + "\n"
-            + "Nachmittag mit explizitem Feierabend u. abweichender Minutenanzahl Arbeitszeit\n"
-            + TIME_FORMAT + " " + DaySection.ZAPFENSTREICH.getParam() + " " + TIME_FORMAT + " -+mm\n\n"
-            + "Mittagspause minimum in Minuten:\n"
-            + " - bis " + MAX_NUMBER_WORK_MINS_WITHOUT_LUNCH + " min ("
-               + MAX_NUMBER_WORK_MINS_WITHOUT_LUNCH / 60 + " std):  0\n"
-            + " - bis " + MAX_NUMBER_WORK_MINS_WITHOUT_LUNCH + " min + "
-               + MIN_LUNCH_DURATION + " min: Arbeitszeit - " + MAX_NUMBER_WORK_MINS_WITHOUT_LUNCH + " min\n"
-            + " - ab  " + MAX_NUMBER_WORK_MINS_WITHOUT_LUNCH + " min + " + MIN_LUNCH_DURATION + " min: "
-               + MIN_LUNCH_DURATION + " min\n"
-            );
+          + "Normalfall Vormittag (Mittagspause <= " + LATEST_LUNCH_TIME + ")\n"
+          + TIME_FORMAT + " " + DaySection.MITTAG.getParam() + "\n"
+          + "Vormittag mit expliziter Mittagspause (<= " + LATEST_LUNCH_TIME + ")\n"
+          + TIME_FORMAT + " " + DaySection.MITTAG.getParam() + " " + TIME_FORMAT + "\n"
+          + "Vormittag mit abweichender Minutenanzahl Arbeitszeit\n"
+          + TIME_FORMAT + " " + DaySection.MITTAG.getParam() + " -+mm\n"
+          + "Normalfall Nachmittag (Mittagspause " + MIN_LUNCH_DURATION + " min)\n"
+          + TIME_FORMAT + " " + DaySection.ZAPFENSTREICH.getParam() + "\n"
+          + "Nachmittag mit expliziter Länge Mittagspause (Mittagspause unter " + MIN_LUNCH_DURATION + " min wird auf " + MIN_LUNCH_DURATION + " min korrigiert)\n"
+          + TIME_FORMAT + " " + DaySection.ZAPFENSTREICH.getParam() + " mm\n"
+          + "Nachmittag mit explizitem Feierabend (Mittagspause je nach Minimum (s.u.))\n"
+          + TIME_FORMAT + " " + DaySection.ZAPFENSTREICH.getParam() + " " + TIME_FORMAT + "\n"
+          + "Nachmittag mit abweichender Minutenanzahl Arbeitszeit\n"
+          + TIME_FORMAT + " " + DaySection.ZAPFENSTREICH.getParam() + " -+mm\n"
+          + "Nachmittag mit explizitem Feierabend u. expliziter Länge Mittagspause (Mittagspause unter Minimum (s.u.) wird auf Minimum korrigiert)\n"
+          + TIME_FORMAT + " " + DaySection.ZAPFENSTREICH.getParam() + " mm " + TIME_FORMAT + "\n"
+          + "Nachmittag mit explizitem Feierabend u. abweichender Minutenanzahl Arbeitszeit\n"
+          + TIME_FORMAT + " " + DaySection.ZAPFENSTREICH.getParam() + " " + TIME_FORMAT + " -+mm\n\n"
+          + "Mittagspause minimum in Minuten:\n"
+          + " - bis " + MAX_NUMBER_WORK_MINS_WITHOUT_LUNCH + " min ("
+          + MAX_NUMBER_WORK_MINS_WITHOUT_LUNCH / MINS_PER_HOUR + " std):  0\n"
+          + " - bis " + MAX_NUMBER_WORK_MINS_WITHOUT_LUNCH + " min + "
+          + MIN_LUNCH_DURATION + " min: Arbeitszeit - " + MAX_NUMBER_WORK_MINS_WITHOUT_LUNCH + " min\n"
+          + " - ab  " + MAX_NUMBER_WORK_MINS_WITHOUT_LUNCH + " min + " + MIN_LUNCH_DURATION + " min: "
+          + MIN_LUNCH_DURATION + " min\n"
+      );
    }
 
 
@@ -231,14 +234,19 @@ class LoadingBar {
    }
 
 
+   private static void showLoadingBarZapfenstreich(LocalTime startTime) {
+      showLoadingBarZapfenstreich(startTime, -1, 0);
+   }
+
+
    private static void showLoadingBarZapfenstreich(LocalTime startTime, Integer manualLunchDuration) {
       showLoadingBarZapfenstreich(startTime, manualLunchDuration, 0);
    }
 
 
    private static void showLoadingBarZapfenstreich(LocalTime startTime, Integer manualLunchDuration, int endTimeOffset) {
-      int minLunchDuration = getMinLunchDuration(startTime, endTimeOffset);
-      int realLunchDuration = getRealLunchDuration(manualLunchDuration, minLunchDuration);
+      long minLunchDuration = getMinLunchDuration(endTimeOffset);
+      long realLunchDuration = getRealLunchDuration(manualLunchDuration, minLunchDuration);
       LocalTime trueEndTime = startTime.plusMinutes(MAX_NUMBER_WORK_MINS + realLunchDuration + endTimeOffset);
       realShowLoadingBarZapfenstreich(startTime, realLunchDuration, trueEndTime);
    }
@@ -246,8 +254,8 @@ class LoadingBar {
 
    private static void showLoadingBarZapfenstreich(LocalTime startTime, Integer manualLunchDuration, LocalTime manualEndTime) {
       LocalTime trueEndTime = manualEndTime;
-      int minLunchDuration = getMinLunchDuration(startTime, trueEndTime);
-      int realLunchDuration = getRealLunchDuration(manualLunchDuration, minLunchDuration);
+      long minLunchDuration = getMinLunchDuration(startTime, trueEndTime);
+      long realLunchDuration = getRealLunchDuration(manualLunchDuration, minLunchDuration);
       if (trueEndTime == null) {
          trueEndTime = startTime.plusMinutes(MAX_NUMBER_WORK_MINS + realLunchDuration);
       }
@@ -255,17 +263,17 @@ class LoadingBar {
    }
 
 
-   private static int getMinLunchDuration(LocalTime startTime, int endTimeOffset) {
+   private static long getMinLunchDuration(int endTimeOffset) {
       if (endTimeOffset == 0) {
          return MIN_LUNCH_DURATION;
       }
-      int totalDuration = MAX_NUMBER_WORK_MINS + endTimeOffset;
-      int effectiveLunchDuration = totalDuration - MAX_NUMBER_WORK_MINS_WITHOUT_LUNCH;
+      long totalDuration = MAX_NUMBER_WORK_MINS + endTimeOffset;
+      long effectiveLunchDuration = totalDuration - MAX_NUMBER_WORK_MINS_WITHOUT_LUNCH;
       return getMinLunchDuration(effectiveLunchDuration);
    }
 
 
-   private static int getMinLunchDuration(LocalTime startTime, LocalTime endTime) {
+   private static long getMinLunchDuration(LocalTime startTime, LocalTime endTime) {
       if (endTime == null) {
          return MIN_LUNCH_DURATION;
       }
@@ -275,20 +283,20 @@ class LoadingBar {
    }
 
 
-   private static int getMinLunchDuration(int effectiveLunchDuration) {
+   private static long getMinLunchDuration(long effectiveLunchDuration) {
       if (effectiveLunchDuration < 0) {
          effectiveLunchDuration = 0;
       }
-      return effectiveLunchDuration < MIN_LUNCH_DURATION ? effectiveLunchDuration : MIN_LUNCH_DURATION;
+      return Math.min(effectiveLunchDuration, MIN_LUNCH_DURATION);
    }
 
 
-   private static int getRealLunchDuration(Integer manualLunchDuration, int minLunchDuration) {
+   private static long getRealLunchDuration(Integer manualLunchDuration, long minLunchDuration) {
       return manualLunchDuration != null && manualLunchDuration >= minLunchDuration ? manualLunchDuration : minLunchDuration;
    }
 
 
-   private static void realShowLoadingBarZapfenstreich(LocalTime startTime, int manualLunchDuration, LocalTime endTime) {
+   private static void realShowLoadingBarZapfenstreich(LocalTime startTime, long manualLunchDuration, LocalTime endTime) {
       if (manualLunchDuration > 0) {
          var totalWorkTime = LocalTime.MIDNIGHT.plusMinutes(startTime.until(endTime, ChronoUnit.MINUTES) - manualLunchDuration);
          System.out.print("Arbeitszeit: " + TIME_FORMATTER.format(totalWorkTime) + "; ");
@@ -329,7 +337,7 @@ class LoadingBar {
       long remainingMinutes = initialMinutes - passedMinutes;
       int numberOfEquals = (int) wholePercentage;
       var sb = new StringBuilder("[");
-      for (int i = 0; i < 100; i++) {
+      for (int i = 0; i < LINE_LENGTH; i++) {
          if (i < numberOfEquals) {
             sb.append("=");
          } else {
@@ -337,7 +345,7 @@ class LoadingBar {
          }
       }
       sb.append("] ").append(PERCENTAGE_FORMAT.format(wholePercentage)).append("% ")
-         .append(minutesToTimeString(passedMinutes)).append(" - ").append(minutesToTimeString(remainingMinutes));
+          .append(minutesToTimeString(passedMinutes)).append(" - ").append(minutesToTimeString(remainingMinutes));
       if (progressive) {
          sb.append("\r");
       }
@@ -346,6 +354,6 @@ class LoadingBar {
 
 
    private static String minutesToTimeString(long minutes) {
-      return LocalTime.of((int) minutes / 60, (int) minutes % 60).format(TIME_FORMATTER);
+      return LocalTime.of((int) minutes / MINS_PER_HOUR, (int) minutes % MINS_PER_HOUR).format(TIME_FORMATTER);
    }
 }
diff --git a/SimpleLoadingBar.java b/SimpleLoadingBar.java
index 0ab2fe0..28f4761 100644
--- a/SimpleLoadingBar.java
+++ b/SimpleLoadingBar.java
@@ -6,12 +6,14 @@ import java.util.Objects;
 import java.util.concurrent.TimeUnit;
 import java.util.regex.Pattern;
 
-class SimpleLoadingBar {
+public class SimpleLoadingBar {
 
    private static final String TIME_FORMAT = "HH:mm";
    private static final DateTimeFormatter TIME_FORMATTER = DateTimeFormatter.ofPattern(TIME_FORMAT);
-   private static final Pattern TIME_PATTERN = Pattern.compile("(?>[01][0-9]|2[0-4]):[0-5][0-9]");
+   private static final Pattern TIME_PATTERN = Pattern.compile("(?>[01]\\d|2[0-4]):[0-5]\\d");
    private static final DecimalFormat PERCENTAGE_FORMAT = new DecimalFormat("00.00");
+   private static final int MINS_PER_HOUR = 60;
+   private static final int LINE_LENGTH = 100;
 
 
    public static void main(String[] args) {
@@ -29,7 +31,7 @@ class SimpleLoadingBar {
       if (args.length > 1) {
          startTime = firstTime;
          nextArg = args[1];
-         if (nextArg.equals("-msg")) {
+         if ("-msg".equals(nextArg)) {
             title = args.length > 2 ? args[2] : title;
          } else {
             verifyTimeFormat(nextArg, "Zweites Argument");
@@ -47,7 +49,7 @@ class SimpleLoadingBar {
          return;
       }
       // if there are 3 arguments, the third will be discarded.
-      boolean hasTitleArg = args.length > 3 && args[2].equals("-msg");
+      boolean hasTitleArg = args.length > 3 && "-msg".equals(args[2]);
       title = hasTitleArg ? args[3] : title;
       title = title.isBlank() ? fallbackTitle : title;
       showLoadingBar(startTime, endTime, title);
@@ -55,11 +57,11 @@ class SimpleLoadingBar {
 
 
    private static void printHelp() {
-      System.out.println(new StringBuilder().append("Mögliche Argumente für LoadingBar:\n")
-         .append("Startzeit, Endzeit, Endnachricht (Optional)\n")
-         .append(TIME_FORMAT).append(" ").append(TIME_FORMAT).append("-msg <Nachricht>\n")
-         .append("Endzeit (Startzeit = jetzt), Endnachricht (Optional)\n")
-         .append(TIME_FORMAT).append("-msg <Nachricht>\n")
+      System.out.println("Mögliche Argumente für LoadingBar:\n"
+          + "Startzeit, Endzeit, Endnachricht (Optional)\n"
+          + TIME_FORMAT + " " + TIME_FORMAT + " -msg <Nachricht>\n"
+          + "Endzeit (Startzeit = jetzt), Endnachricht (Optional)\n"
+          + TIME_FORMAT + " -msg <Nachricht>\n"
       );
    }
 
@@ -78,12 +80,11 @@ class SimpleLoadingBar {
       if (TIME_PATTERN.matcher(param).matches()) {
          return;
       }
-      System.out.println(errMsgPrefix + " \"" + param + "\" muss Uhrzeitformat ("+ TIME_FORMAT + ") entsprechen.");
+      System.out.println(errMsgPrefix + " \"" + param + "\" muss Uhrzeitformat (" + TIME_FORMAT + ") entsprechen.");
       System.exit(1);
    }
 
 
-
    public static void showLoadingBar(LocalTime startTime, LocalTime endTime, String title) {
       long initialMinutes = startTime.until(endTime, ChronoUnit.MINUTES);
       System.out.print(minutesToTimeString(initialMinutes) + " gesamt; Endzeit: " + TIME_FORMATTER.format(endTime) + "\n");
@@ -117,7 +118,7 @@ class SimpleLoadingBar {
       long remainingMinutes = initialMinutes - passedMinutes;
       int numberOfEquals = (int) wholePercentage;
       var sb = new StringBuilder("[");
-      for (int i = 0; i < 100; i++) {
+      for (int i = 0; i < LINE_LENGTH; i++) {
          if (i < numberOfEquals) {
             sb.append("=");
          } else {
@@ -125,7 +126,7 @@ class SimpleLoadingBar {
          }
       }
       sb.append("] ").append(PERCENTAGE_FORMAT.format(wholePercentage)).append("% ")
-         .append(minutesToTimeString(passedMinutes)).append(" - ").append(minutesToTimeString(remainingMinutes));
+          .append(minutesToTimeString(passedMinutes)).append(" - ").append(minutesToTimeString(remainingMinutes));
       if (progressive) {
          sb.append("\r");
       }
@@ -134,15 +135,12 @@ class SimpleLoadingBar {
 
 
    private static String minutesToTimeString(long minutes) {
-      return LocalTime.of((int) minutes / 60, (int) minutes % 60).format(TIME_FORMATTER);
+      return LocalTime.of((int) minutes / MINS_PER_HOUR, (int) minutes % MINS_PER_HOUR).format(TIME_FORMATTER);
    }
 
 
    private static String formatTitle(String title) {
-      var sb = new StringBuilder();
-      for (int i = 0; i < title.length(); i++) {
-         sb.append("*");
-      }
-      return sb.toString() + "\n" + title + "\n" + sb.toString();
+      String separator = "*".repeat(title.length());
+      return separator + "\n" + title + "\n" + separator;
    }
 }