Index: trunk/test/unit/org/openstreetmap/josm/tools/UtilsTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/tools/UtilsTest.java	(revision 13519)
+++ trunk/test/unit/org/openstreetmap/josm/tools/UtilsTest.java	(revision 13520)
@@ -213,4 +213,13 @@
             System.setProperty("java.version", "9.0.1");
             assertEquals(9, Utils.getJavaVersion());
+
+            System.setProperty("java.version", "10");
+            assertEquals(10, Utils.getJavaVersion());
+
+            System.setProperty("java.version", "10-ea");
+            assertEquals(10, Utils.getJavaVersion());
+
+            System.setProperty("java.version", "10.0.1");
+            assertEquals(10, Utils.getJavaVersion());
         } finally {
             System.setProperty("java.version", javaVersion);