Java 17 features (H-M) (#15520)

- add missing @override
- Java style array syntax
- remove redundant modifiers
- always move String constants to left side in comparisons
- simplify lambda expressions and return statements
- use replace instead of replaceAll w/o regex
- instanceof matching and multiline strings
- remove null check before instanceof

Signed-off-by: Holger Friedrich <mail@holger-friedrich.de>

bundles/org.openhab.binding.haassohnpelletstove/src/main/java/org/openhab/binding/haassohnpelletstove/internal/HaasSohnpelletstoveHandler.java

@@ -82,11 +82,9 @@ public class HaasSohnpelletstoveHandler extends BaseThingHandler {
                 updateOvenData(postData);
             }
         } else if (channelUID.getId().equals(CHANNELSPTEMP)) {
-            if (command instanceof QuantityType<?>) {
-                QuantityType<?> value = (QuantityType<?>) command;
-
+            if (command instanceof QuantityType<?> quantityCommand) {
                 Unit<Temperature> unit = SIUnits.CELSIUS;
-                value = value.toUnit(unit);
+                QuantityType<?> value = quantityCommand.toUnit(unit);
                 if (value != null) {
                     double a = value.doubleValue();
                     String postdata = "{\"sp_temp\":" + a + "}";

bundles/org.openhab.binding.haassohnpelletstove/src/main/java/org/openhab/binding/haassohnpelletstove/internal/MD5Utils.java

@@ -38,8 +38,7 @@ public class MD5Utils {
         } catch (NoSuchAlgorithmException e) {
             throw new IllegalArgumentException(e);
         }
-        byte[] result = md.digest(input);
-        return result;
+        return md.digest(input);
     }
 
     private static String bytesToHex(byte[] bytes) {