Java 17 features (A-G) (#15516)

- 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

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

bundles/org.openhab.binding.gardena/src/main/java/org/openhab/binding/gardena/internal/handler/GardenaAccountHandler.java

@@ -21,8 +21,8 @@ import java.time.format.DateTimeFormatter;
 import java.time.format.DateTimeParseException;
 import java.time.format.FormatStyle;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.Map;
+import java.util.Set;
 import java.util.concurrent.ScheduledFuture;
 import java.util.concurrent.TimeUnit;
 
@@ -262,7 +262,7 @@ public class GardenaAccountHandler extends BaseBridgeHandler implements GardenaS
 
     @Override
     public Collection<Class<? extends ThingHandlerService>> getServices() {
-        return Collections.singleton(GardenaDeviceDiscoveryService.class);
+        return Set.of(GardenaDeviceDiscoveryService.class);
     }
 
     @Override

bundles/org.openhab.binding.gardena/src/main/java/org/openhab/binding/gardena/internal/handler/GardenaThingHandler.java

@@ -231,7 +231,7 @@ public class GardenaThingHandler extends BaseThingHandler {
     public void handleCommand(ChannelUID channelUID, Command command) {
         logger.debug("Command received: {}", command);
         try {
-            boolean isOnCommand = command instanceof OnOffType && ((OnOffType) command) == OnOffType.ON;
+            boolean isOnCommand = command instanceof OnOffType onOffCommand && onOffCommand == OnOffType.ON;
             String dataItemProperty = getDeviceDataItemProperty(channelUID);
             if (RefreshType.REFRESH == command) {
                 logger.debug("Refreshing Gardena connection");

bundles/org.openhab.binding.gardena/src/main/java/org/openhab/binding/gardena/internal/model/dto/command/ValveCommand.java

@@ -20,7 +20,7 @@ package org.openhab.binding.gardena.internal.model.dto.command;
 public class ValveCommand extends GardenaCommand {
     private static final String COMMAND_TYPE = "VALVE_CONTROL";
 
-    public static enum ValveControl {
+    public enum ValveControl {
         START_SECONDS_TO_OVERRIDE,
         STOP_UNTIL_NEXT_TASK,
         PAUSE,