apacheGH-35053: [Java] Fix MemoryUtil to support Java 21

java/memory/memory-core/src/main/java/org/apache/arrow/memory/util/MemoryUtil.java

@@ -54,6 +54,10 @@ public class MemoryUtil {
    */
   public static final boolean LITTLE_ENDIAN = ByteOrder.nativeOrder() == ByteOrder.LITTLE_ENDIAN;
 
+  // Java 1.8, 9, 11, 17, 21 becomes 1, 9, 11, 17, and 21.
+  private static final int majorVersion =
+    Integer.parseInt(System.getProperty("java.specification.version").split("\\D+")[0]);
+
   static {
     try {
       // try to get the unsafe object
@@ -94,8 +98,9 @@ public Object run() {
               @Override
               public Object run() {
                 try {
-                  final Constructor<?> constructor =
+                  final Constructor<?> constructor = (majorVersion < 21) ?
                       direct.getClass().getDeclaredConstructor(long.class, int.class);
+                      direct.getClass().getDeclaredConstructor(long.class, long.class);
                   constructor.setAccessible(true);
                   logger.debug("Constructor for direct buffer found and made accessible");
                   return constructor;