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.buienradar/src/main/java/org/openhab/binding/buienradar/internal/BuienradarHandler.java

@@ -126,7 +126,7 @@ public class BuienradarHandler extends BaseThingHandler {
         }
         try {
             final Optional<List<Prediction>> predictionsOpt = client.getPredictions(location);
-            if (!predictionsOpt.isPresent()) {
+            if (predictionsOpt.isEmpty()) {
                 // Did not get a result, retry the retrieval.
                 // Buienradar is not a very stable source and returns nothing quite regular
                 if (tries <= 2) {

bundles/org.openhab.binding.buienradar/src/main/java/org/openhab/binding/buienradar/internal/BuienradarHandlerFactory.java

@@ -14,7 +14,6 @@ package org.openhab.binding.buienradar.internal;
 
 import static org.openhab.binding.buienradar.internal.BuienradarBindingConstants.THING_TYPE_RAIN_FORECAST;
 
-import java.util.Collections;
 import java.util.Set;
 
 import org.eclipse.jdt.annotation.NonNullByDefault;
@@ -36,7 +35,7 @@ import org.osgi.service.component.annotations.Component;
 @Component(configurationPid = "binding.buienradar", service = ThingHandlerFactory.class)
 public class BuienradarHandlerFactory extends BaseThingHandlerFactory {
 
-    private static final Set<ThingTypeUID> SUPPORTED_THING_TYPES_UIDS = Collections.singleton(THING_TYPE_RAIN_FORECAST);
+    private static final Set<ThingTypeUID> SUPPORTED_THING_TYPES_UIDS = Set.of(THING_TYPE_RAIN_FORECAST);
 
     @Override
     public boolean supportsThingType(ThingTypeUID thingTypeUID) {