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.harmonyhub/src/main/java/org/openhab/binding/harmonyhub/internal/handler/HarmonyDeviceHandler.java

@@ -15,7 +15,6 @@ package org.openhab.binding.harmonyhub.internal.handler;
 import static org.openhab.binding.harmonyhub.internal.HarmonyHubBindingConstants.*;
 
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Set;
@@ -65,7 +64,7 @@ public class HarmonyDeviceHandler extends BaseThingHandler {
 
     private final Logger logger = LoggerFactory.getLogger(HarmonyDeviceHandler.class);
 
-    public static final Set<ThingTypeUID> SUPPORTED_THING_TYPES_UIDS = Collections.singleton(HARMONY_DEVICE_THING_TYPE);
+    public static final Set<ThingTypeUID> SUPPORTED_THING_TYPES_UIDS = Set.of(HARMONY_DEVICE_THING_TYPE);
 
     private final HarmonyHubDynamicTypeProvider typeProvider;
 

bundles/org.openhab.binding.harmonyhub/src/main/java/org/openhab/binding/harmonyhub/internal/handler/HarmonyHubHandler.java

@@ -126,9 +126,9 @@ public class HarmonyHubHandler extends BaseBridgeHandler implements HarmonyClien
 
         switch (channel.getUID().getId()) {
             case CHANNEL_CURRENT_ACTIVITY:
-                if (command instanceof DecimalType) {
+                if (command instanceof DecimalType decimalCommand) {
                     try {
-                        client.startActivity(((DecimalType) command).intValue());
+                        client.startActivity(decimalCommand.intValue());
                     } catch (Exception e) {
                         logger.warn("Could not start activity", e);
                     }