Workaround for obscure error when compiling tests

de.hft-stuttgart.cityunits.tests/src/de/hftstuttgart/cityunits/tests/QuantityTest.java

@@ -12,7 +12,7 @@ import de.hftstuttgart.cityunits.model.UrbanSimulationUnits;
 import tech.units.indriya.quantity.Quantities;
 import tech.units.indriya.unit.Units;
 
-
+// Quantities.getQuantity("1.50 €"); does not compile in Maven without cast to String ???
 class QuantityTest
 {
 	@BeforeAll
@@ -23,8 +23,7 @@ class QuantityTest
 
 	@Test
 	void testTemperature() {
-		java.lang.String cs = "5 °C";
-		Quantity<?> q = Quantities.getQuantity(cs);
+		Quantity<?> q = Quantities.getQuantity((String)"5 °C");
 
 		assertEquals("[Θ]", q.getUnit().getDimension().toString(), "Wrong dimension!");
 		assertEquals("278.15 K", q.toSystemUnit().toString(), "Wrong calculation of Celsius to Kelvin!");
@@ -42,14 +41,13 @@ class QuantityTest
 
 	@Test
 	void testUrbanSimulationUnitMoney() {
-		Quantity<?> cost = Quantities.getQuantity("1.50 €");
+		Quantity<?> cost = Quantities.getQuantity((String)"1.50 €");
 		assertEquals(cost.getUnit(), UrbanSimulationUnits.EURO, "Wrong currency!");
 	}
 
 	@Test
 	void testUrbanSimulationUnitPPMAndTon() {
-		Quantity<?> q = Quantities.getQuantity("20 ppm").multiply(Quantities.getQuantity("10 t"));
-
+		Quantity<?> q = Quantities.getQuantity((String)"20 ppm").multiply(Quantities.getQuantity((String)"10 t"));
 		assertEquals("[M]", q.getUnit().getDimension().toString());
 		assertEquals(UrbanSimulationUnits.PARTS_PER_MILLION.multiply(UrbanSimulationUnits.TON), q.getUnit());
 		assertEquals(200, q.getValue());
@@ -57,7 +55,7 @@ class QuantityTest
 
 	@Test
 	void testkWhPerCubicMeter() {
-		Quantity<?> q = Quantities.getQuantity("5.2 kW*h/m³");
+		Quantity<?> q = Quantities.getQuantity((String)"5.2 kW*h/m³");
 		assertEquals("[M]/([L]·[T]²)", q.getUnit().getDimension().toString(), "Wrong dimension!");
 		assertEquals("187200000 W·s/m³", q.toSystemUnit().toString());
 	}