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.bsblan/src/main/java/org/openhab/binding/bsblan/internal/handler/BsbLanBaseThingHandler.java

@@ -71,8 +71,8 @@ public abstract class BsbLanBaseThingHandler extends BaseThingHandler {
                 return null;
             }
             ThingHandler handler = bridge.getHandler();
-            if (handler instanceof BsbLanBridgeHandler) {
-                this.bridgeHandler = (BsbLanBridgeHandler) handler;
+            if (handler instanceof BsbLanBridgeHandler lanBridgeHandler) {
+                this.bridgeHandler = lanBridgeHandler;
             }
         }
         return this.bridgeHandler;

bundles/org.openhab.binding.bsblan/src/main/java/org/openhab/binding/bsblan/internal/helper/BsbLanParameterConverter.java

@@ -106,7 +106,7 @@ public class BsbLanParameterConverter {
 
     private static State getStateForSwitchValueChannel(BsbLanApiParameterDTO parameter) {
         // treat "0" as OFF and everything else as ON
-        return parameter.value.equals("0") ? OnOffType.OFF : OnOffType.ON;
+        return "0".equals(parameter.value) ? OnOffType.OFF : OnOffType.ON;
     }
 
     /**
@@ -134,9 +134,7 @@ public class BsbLanParameterConverter {
     }
 
     private static @Nullable String getValueForNumberValueChannel(Command command) {
-        if (command instanceof QuantityType<?>) {
-            // the target unit is yet unknown, so just use the value as is (without converting based on the unit)
-            QuantityType<?> quantity = (QuantityType<?>) command;
+        if (command instanceof QuantityType<?> quantity) {
             return String.valueOf(quantity.doubleValue());
         }
         // check if numeric

bundles/org.openhab.binding.bsblan/src/test/java/org/openhab/binding/bsblan/internal/api/BsbLanApiContentConverterTests.java

@@ -35,8 +35,17 @@ public class BsbLanApiContentConverterTests {
 
     @Test
     public void parseBsbLanApiParameterQueryResponse() {
-        String content = "{\r\n" + "\"700\": {\r\n" + "\"name\": \"Betriebsart\",\r\n" + "\"value\": \"0\",\r\n"
-                + "\"unit\": \"\",\r\n" + "\"desc\": \"Schutzbetrieb\",\r\n" + "\"dataType\": 1\r\n" + "}\r\n" + "}";
+        String content = """
+                {
+                "700": {
+                "name": "Betriebsart",
+                "value": "0",
+                "unit": "",
+                "desc": "Schutzbetrieb",
+                "dataType": 1
+                }
+                }\
+                """;
 
         BsbLanApiParameterQueryResponseDTO r = BsbLanApiContentConverter.fromJson(content,
                 BsbLanApiParameterQueryResponseDTO.class);