update to jdk 23

Author: saurabh.kumar

.github/workflows/maven.yml

@@ -16,10 +16,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
-    - name: Set up JDK 22
+    - name: Set up JDK 23
       uses: actions/setup-java@v4
       with:
-        java-version: 22
+        java-version: 23
         distribution: 'temurin'
     - name: Build with Maven JavaCon
       run: mvn -B package --file JavaCon/pom.xml

JavaCon/Collections/src/main/java/map/MapWithChangedKey.java

@@ -0,0 +1,41 @@
+package map;
+
+import java.util.HashMap;
+
+public class MapWithChangedKey {
+
+    public static void main(String[] args) {
+        sb();
+        string2();
+    }
+
+    private static void sb() {
+        final var map = new HashMap<StringBuilder, String>();
+        final var key1 = new StringBuilder("key1");
+        final var key2 = new StringBuilder("key2");
+
+        map.put(key1, "value1");
+        map.put(key2, "value2");
+
+        key1.append("__changed");
+
+        System.out.println("sb value for key1: " + map.get(key1));
+        System.out.println("sb value for key1: " + map.get(new StringBuilder("key1__changed")));
+        System.out.println("sb value for key2: " + map.get(new StringBuilder("key2")));
+    }
+
+    private static void string2() {
+        final var map = new HashMap<String, String>();
+        var key1 = "key1";
+        final var key2 = "key2";
+
+        map.put(key1, "value1");
+        map.put(key2, "value2");
+
+        key1 += "__changed";
+
+        System.out.println("sb value for key1: " + map.get(key1));
+        System.out.println("sb value for key1: " + map.get("key1__changed"));
+        System.out.println("sb value for key2: " + map.get("key2"));
+    }
+}

JavaCon/Java25Features/pom.xml

@@ -17,7 +17,7 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <release>22</release>
+                    <release>23</release>
                     <compilerArgs>--enable-preview</compilerArgs>
                 </configuration>
             </plugin>

JavaCon/Java25Features/src/main/java/com/saurabh/java/StringLiteralJDK21.java

@@ -15,7 +15,7 @@ public static void main(String[] args) {
         try {
             throw new IllegalArgumentException("test");
         } catch (IllegalStateException _) {
-            System.out.println(STR."Got an illegal state exception for: \{car.name()}");
+//            System.out.println("Got an illegal state exception for: \{car.name()}");
         } catch (RuntimeException _) {
             System.out.println("Got a runtime exception!");
         }

JavaCon/Java25Features/src/main/java/com/saurabh/java/UnnamedPatternVariable.java

@@ -15,7 +15,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <maven.compiler.release>22</maven.compiler.release>
+        <maven.compiler.release>23</maven.compiler.release>
 
         <!-- testing -->
         <junit-jupiter.version>5.11.3</junit-jupiter.version>