[Sync Iteration] java/captains-log/1

solutions/java/captains-log/1/src/main/java/CaptainsLog.java

@@ -0,0 +1,30 @@
+import java.util.Random;
+import java.util.List;
+import java.util.concurrent.ThreadLocalRandom;
+
+class CaptainsLog {
+
+    private static final char[] PLANET_CLASSES = new char[]{'D', 'H', 'J', 'K', 'L', 'M', 'N', 'R', 'T', 'Y'};
+
+    private Random random;
+
+    CaptainsLog(Random random) {
+        this.random = random;
+    }
+
+    char randomPlanetClass() {
+        List<Character> buchstaben = List.of('D', 'H', 'J', 'K', 'L', 'M', 'N', 'R', 'T', 'Y');
+        int index = random.nextInt(buchstaben.size());
+
+        return buchstaben.get(index);
+    }
+
+    String randomShipRegistryNumber() {
+        int zahl = random.nextInt(10000 - 1000) + 1000;
+        return "NCC-" + zahl;
+    }
+
+    double randomStardate() {
+        return 41000 +random.nextDouble() * (42000 - 41000);
+    }
+}