diff --git a/java/java-psi-impl/src/com/intellij/lang/java/lexer/JavaLexer.java b/java/java-psi-impl/src/com/intellij/lang/java/lexer/JavaLexer.java
index b771724eacbe..297eb7f0cbb8 100644
--- a/java/java-psi-impl/src/com/intellij/lang/java/lexer/JavaLexer.java
+++ b/java/java-psi-impl/src/com/intellij/lang/java/lexer/JavaLexer.java
@@ -40,7 +40,11 @@ public final class JavaLexer extends LexerBase {
             level.isAtLeast(LanguageLevel.JDK_10) && VAR.contentEquals(id) ||
             level.isAtLeast(LanguageLevel.JDK_15_PREVIEW) && RECORD.contentEquals(id) ||
             level.isAtLeast(LanguageLevel.JDK_14) && YIELD.contentEquals(id) ||
-            (level.isAtLeast(LanguageLevel.JDK_15_PREVIEW) && (level == LanguageLevel.JDK_X || level.isPreview()) && (SEALED.contentEquals(id) || PERMITS.contentEquals(id))));
+            (isSealedAvailable(level) && (SEALED.contentEquals(id) || PERMITS.contentEquals(id))));
+  }
+
+  public static boolean isSealedAvailable(@NotNull LanguageLevel level) {
+    return level.isAtLeast(LanguageLevel.JDK_15_PREVIEW) && (level == LanguageLevel.JDK_X || level.isPreview());
   }
 
   private final _JavaLexer myFlexLexer;
diff --git a/java/java-psi-impl/src/com/intellij/lang/java/parser/DeclarationParser.java b/java/java-psi-impl/src/com/intellij/lang/java/parser/DeclarationParser.java
index d71d4bf49af9..2bb4558eb8d6 100644
--- a/java/java-psi-impl/src/com/intellij/lang/java/parser/DeclarationParser.java
+++ b/java/java-psi-impl/src/com/intellij/lang/java/parser/DeclarationParser.java
@@ -4,6 +4,7 @@ package com.intellij.lang.java.parser;
 import com.intellij.core.JavaPsiBundle;
 import com.intellij.lang.PsiBuilder;
 import com.intellij.lang.PsiBuilderUtil;
+import com.intellij.lang.java.lexer.JavaLexer;
 import com.intellij.openapi.util.Pair;
 import com.intellij.pom.java.LanguageLevel;
 import com.intellij.psi.JavaTokenType;
@@ -434,13 +435,13 @@ public class DeclarationParser {
   }
 
   private static boolean isSealedToken(PsiBuilder builder, IElementType tokenType) {
-    return getLanguageLevel(builder).isAtLeast(LanguageLevel.JDK_15_PREVIEW) &&
+    return JavaLexer.isSealedAvailable(getLanguageLevel(builder)) &&
            tokenType == JavaTokenType.IDENTIFIER &&
            PsiKeyword.SEALED.equals(builder.getTokenText());
   }
 
   private static boolean isNonSealedToken(PsiBuilder builder, IElementType tokenType) {
-    if (!getLanguageLevel(builder).isAtLeast(LanguageLevel.JDK_15_PREVIEW) ||
+    if (!JavaLexer.isSealedAvailable(getLanguageLevel(builder)) ||
         tokenType != JavaTokenType.IDENTIFIER ||
         !"non".equals(builder.getTokenText()) ||
         builder.lookAhead(1) != JavaTokenType.MINUS ||