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.danfossairunit/src/main/java/org/openhab/binding/danfossairunit/internal/DanfossAirUnit.java

@@ -236,16 +236,16 @@ public class DanfossAirUnit {
     }
 
     private DecimalType setNumberTypeRegister(Command cmd, byte[] register) throws IOException {
-        if (cmd instanceof DecimalType) {
-            byte value = (byte) ((DecimalType) cmd).intValue();
+        if (cmd instanceof DecimalType decimalCommand) {
+            byte value = (byte) decimalCommand.intValue();
             set(REGISTER_1_WRITE, register, value);
         }
         return new DecimalType(BigDecimal.valueOf(getByte(REGISTER_1_READ, register)));
     }
 
     private PercentType setPercentTypeRegister(Command cmd, byte[] register) throws IOException {
-        if (cmd instanceof PercentType) {
-            byte value = (byte) ((((PercentType) cmd).intValue() + 5) / 10);
+        if (cmd instanceof PercentType percentCommand) {
+            byte value = (byte) ((percentCommand.intValue() + 5) / 10);
             set(REGISTER_1_WRITE, register, value);
         }
         return new PercentType(BigDecimal.valueOf(getByte(REGISTER_1_READ, register) * 10));

bundles/org.openhab.binding.danfossairunit/src/main/java/org/openhab/binding/danfossairunit/internal/DanfossAirUnitCommunicationController.java

@@ -52,6 +52,7 @@ public class DanfossAirUnitCommunicationController implements CommunicationContr
         this.port = port;
     }
 
+    @Override
     public synchronized void connect() throws IOException {
         if (connected) {
             return;
@@ -64,6 +65,7 @@ public class DanfossAirUnitCommunicationController implements CommunicationContr
         connected = true;
     }
 
+    @Override
     public synchronized void disconnect() {
         if (!connected) {
             return;
@@ -83,10 +85,12 @@ public class DanfossAirUnitCommunicationController implements CommunicationContr
         connected = false;
     }
 
+    @Override
     public byte[] sendRobustRequest(byte[] operation, byte[] register) throws IOException {
         return sendRobustRequest(operation, register, EMPTY);
     }
 
+    @Override
     public synchronized byte[] sendRobustRequest(byte[] operation, byte[] register, byte[] value) throws IOException {
         connect();
         byte[] request = new byte[4 + value.length];

bundles/org.openhab.binding.danfossairunit/src/main/java/org/openhab/binding/danfossairunit/internal/DanfossAirUnitHandlerFactory.java

@@ -14,7 +14,6 @@ package org.openhab.binding.danfossairunit.internal;
 
 import static org.openhab.binding.danfossairunit.internal.DanfossAirUnitBindingConstants.THING_TYPE_AIRUNIT;
 
-import java.util.Collections;
 import java.util.Set;
 
 import org.eclipse.jdt.annotation.NonNullByDefault;
@@ -38,7 +37,7 @@ import org.osgi.service.component.annotations.Component;
 @Component(configurationPid = "binding.danfossairunit", service = ThingHandlerFactory.class)
 public class DanfossAirUnitHandlerFactory extends BaseThingHandlerFactory {
 
-    private static final Set<ThingTypeUID> SUPPORTED_THING_TYPES_UIDS = Collections.singleton(THING_TYPE_AIRUNIT);
+    private static final Set<ThingTypeUID> SUPPORTED_THING_TYPES_UIDS = Set.of(THING_TYPE_AIRUNIT);
 
     @Override
     public boolean supportsThingType(ThingTypeUID thingTypeUID) {