Remove superfluous use of reflection in Class::isRecord

For a Class to be considered a record class at runtime, Class::isRecord requires that the direct superclass is j.l.Record. While previewing, the implementation did this check reflectively, to avoid a static dependency on a previewing API. Now that records are final, the implementation can simply refer to j.l.Record statically.


--- a/src/java.base/share/classes/java/lang/Class.java
+++ b/src/java.base/share/classes/java/lang/Class.java
@@ -3661,16 +3661,6 @@ public final class Class<T> implements java.io.Serializable,
         this.getSuperclass() == java.lang.Enum.class;
     }
 
- /** java.lang.Record.class */
- private static final Class<?> JAVA_LANG_RECORD_CLASS = javaLangRecordClass();
- private static Class<?> javaLangRecordClass() {
- try {
- return Class.forName0("java.lang.Record", false, null, null);
- } catch (ClassNotFoundException e) {
- throw new InternalError("should not reach here", e);
- }
- }
-
     /**
      * Returns {@code true} if and only if this class is a record class.
      *
@@ -3687,7 +3677,7 @@ public final class Class<T> implements java.io.Serializable,
      * @since 16
      */
     public boolean isRecord() {
- return getSuperclass() == JAVA_LANG_RECORD_CLASS && isRecord0();
+ return getSuperclass() == java.lang.Record.class && isRecord0();
     }