new project structure

- use objects and inheritance
- enabled combined version for drinking and loading bar without impacting any of them

zeitlaeufer/src/main/java/de/szimnau/tools/CommonTools.java

@@ -0,0 +1,28 @@
+package de.szimnau.tools;
+
+import java.lang.*;
+import java.math.BigDecimal;
+import java.math.MathContext;
+import java.math.RoundingMode;
+import java.util.*;
+
+
+public class CommonTools {
+
+   public static final int MINS_PER_HOUR = 60;
+   public static final BigDecimal MINS_PER_HOUR_BD = BigDecimal.valueOf(MINS_PER_HOUR);
+   public static final MathContext MC_INTEGER = new MathContext(1, RoundingMode.HALF_EVEN);
+
+
+   private CommonTools() {}
+
+
+   public static void print(Object o) {
+      System.out.print(o);
+   }
+
+
+   public static void println(Object o) {
+      System.out.println(o);
+   }
+}

zeitlaeufer/src/main/java/de/szimnau/tools/FormatTools.java

@@ -0,0 +1,32 @@
+package de.szimnau.tools;
+
+import java.lang.*;
+import java.math.BigDecimal;
+import java.text.DecimalFormat;
+import java.time.format.DateTimeFormatter;
+import java.time.LocalTime;
+import java.util.*;
+import java.util.regex.Pattern;
+
+
+public class FormatTools {
+
+   public static final String TIME_FORMAT = "HH:mm";
+   public static final DateTimeFormatter TIME_FORMATTER = DateTimeFormatter.ofPattern(TIME_FORMAT);
+   public static final Pattern TIME_PATTERN = Pattern.compile("(?>[01]\\d|2[0-4]):[0-5]\\d");
+   public static final DecimalFormat PERCENTAGE_FORMAT = new DecimalFormat("00.00");
+
+
+   private FormatTools() {}
+
+
+   public static String minutesToTimeString(long minutes) {
+      return minutesToTimeString(BigDecimal.valueOf(minutes));
+   }
+
+
+   public static String minutesToTimeString(BigDecimal minutes) {
+      BigDecimal[] hoursAndMinutes = minutes.divideAndRemainder(CommonTools.MINS_PER_HOUR_BD, CommonTools.MC_INTEGER);
+      return LocalTime.of(hoursAndMinutes[0].intValue(), hoursAndMinutes[1].intValue()).format(TIME_FORMATTER);
+   }
+}