diff --git a/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/main/ClassWriter.java b/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/main/ClassWriter.java
index b8227e9b1a01..6b02140800bc 100644
--- a/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/main/ClassWriter.java
+++ b/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/main/ClassWriter.java
@@ -420,6 +420,7 @@ public class ClassWriter {
     }
 
     List<StructRecordComponent> components = cl.getRecordComponents();
+    List<String> permittedSubclassSignature = cl.getPermittedSubclasses();
 
     if (components != null) {
       // records are implicitly final
@@ -428,6 +429,13 @@ public class ClassWriter {
 
     appendModifiers(buffer, flags, CLASS_ALLOWED, isInterface, CLASS_EXCLUDED);
 
+    if (permittedSubclassSignature != null) {
+      buffer.append("sealed ");
+    }
+    else if (node.isNonSealed()) {
+      buffer.append("non-sealed ");
+    }
+
     if (isEnum) {
       buffer.append("enum ");
     }
@@ -498,9 +506,33 @@ public class ClassWriter {
       }
     }
 
+    if (permittedSubclassSignature != null) {
+      List<ClassNode> permittedOuterSubClasses = getClassNodes(permittedSubclassSignature).stream()
+        .filter(subClass -> !subClass.enclosingClasses.contains(node.classStruct.qualifiedName))
+        .collect(Collectors.toList());
+      if (!permittedOuterSubClasses.isEmpty()) { // only generate permits lists for nested classes
+        buffer.append("permits ");
+        for (int i = 0; i < permittedOuterSubClasses.size(); i++) {
+          if (i > 0) {
+            buffer.append(", ");
+          }
+          ClassNode subClass = permittedOuterSubClasses.get(i);
+          DecompilerContext.getImportCollector().getShortName(subClass.classStruct.qualifiedName); // add qualified name to potential import list
+          buffer.append(subClass.simpleName);
+        }
+        buffer.append(' ');
+      }
+    }
     buffer.append('{').appendLineSeparator();
   }
 
+  private static List<ClassNode> getClassNodes(List<String> qualifiedClassNames) {
+    return qualifiedClassNames.stream()
+      .map(str -> DecompilerContext.getClassProcessor().getMapRootClasses().get(str))
+      .collect(Collectors.toList()
+    );
+  }
+
   private static boolean isVarArgRecord(StructClass cl) {
     String canonicalConstructorDescriptor =
       cl.getRecordComponents().stream().map(c -> c.getDescriptor()).collect(Collectors.joining("", "(", ")V"));
diff --git a/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/main/ClassesProcessor.java b/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/main/ClassesProcessor.java
index 7bb50aaeb939..3a2d70ecc3aa 100644
--- a/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/main/ClassesProcessor.java
+++ b/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/main/ClassesProcessor.java
@@ -1,4 +1,4 @@
-// Copyright 2000-2021 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package org.jetbrains.java.decompiler.main;
 
 import org.jetbrains.java.decompiler.code.CodeConstants;
@@ -22,6 +22,7 @@ import org.jetbrains.java.decompiler.struct.attr.StructEnclosingMethodAttribute;
 import org.jetbrains.java.decompiler.struct.attr.StructGeneralAttribute;
 import org.jetbrains.java.decompiler.struct.attr.StructInnerClassesAttribute;
 import org.jetbrains.java.decompiler.struct.consts.ConstantPool;
+import org.jetbrains.java.decompiler.struct.consts.PrimitiveConstant;
 import org.jetbrains.java.decompiler.struct.gen.VarType;
 import org.jetbrains.java.decompiler.util.InterpreterUtil;
 import org.jetbrains.java.decompiler.util.TextBuffer;
@@ -29,6 +30,7 @@ import org.jetbrains.java.decompiler.util.TextBuffer;
 import java.io.IOException;
 import java.util.*;
 import java.util.Map.Entry;
+import java.util.stream.Collectors;
 
 public class ClassesProcessor implements CodeConstants {
   public static final int AVERAGE_CLASS_SIZE = 16 * 1024;
@@ -122,6 +124,27 @@ public class ClassesProcessor implements CodeConstants {
       }
     }
 
+    // set non-sealed if class extends or implements a sealed class
+    for (Entry<String, ClassNode> ent : mapRootClasses.entrySet()) {
+      ClassNode clazz = ent.getValue();
+      List<String> qualifiedSealedSuperNames = new ArrayList<>(Arrays.asList(clazz.classStruct.getInterfaceNames()));
+      PrimitiveConstant superConst = clazz.classStruct.superClass;
+      if (superConst != null) qualifiedSealedSuperNames.add(superConst.getString());
+      List<ClassNode> potentialSealedSupers = qualifiedSealedSuperNames.stream()
+        .map(mapRootClasses::get)
+        .filter(Objects::nonNull)
+        .collect(Collectors.toList());
+      for (ClassNode potentialSealedSuper : potentialSealedSupers) {
+        if (potentialSealedSuper.classStruct.getPermittedSubclasses() != null &&
+          potentialSealedSuper.classStruct.getPermittedSubclasses().contains(clazz.classStruct.qualifiedName) &&
+          (clazz.access & CodeConstants.ACC_FINAL) == 0 &&
+          clazz.classStruct.getPermittedSubclasses() == null
+        ) {
+          clazz.setNonSealed(true);
+        }
+      }
+    }
+
     if (bDecompileInner) {
       // connect nested classes
       for (Entry<String, ClassNode> ent : mapRootClasses.entrySet()) {
@@ -418,6 +441,7 @@ public class ClassesProcessor implements CodeConstants {
 
     public int type;
     public int access;
+    public boolean isNonSealed = false;
     public String simpleName;
     public final StructClass classStruct;
     private ClassWrapper wrapper;
@@ -491,6 +515,14 @@ public class ClassesProcessor implements CodeConstants {
       return node.wrapper;
     }
 
+    public boolean isNonSealed() {
+      return isNonSealed;
+    }
+
+    public void setNonSealed(boolean nonSealed) {
+      isNonSealed = nonSealed;
+    }
+
     public static class LambdaInformation {
       public String method_name;
       public String method_descriptor;
diff --git a/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/struct/StructClass.java b/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/struct/StructClass.java
index 4809851539c0..b9739cc85bf1 100644
--- a/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/struct/StructClass.java
+++ b/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/struct/StructClass.java
@@ -3,6 +3,7 @@ package org.jetbrains.java.decompiler.struct;
 
 import org.jetbrains.java.decompiler.code.CodeConstants;
 import org.jetbrains.java.decompiler.struct.attr.StructGeneralAttribute;
+import org.jetbrains.java.decompiler.struct.attr.StructPermittedSubclassesAttribute;
 import org.jetbrains.java.decompiler.struct.attr.StructRecordAttribute;
 import org.jetbrains.java.decompiler.struct.consts.ConstantPool;
 import org.jetbrains.java.decompiler.struct.consts.PrimitiveConstant;
@@ -160,6 +161,12 @@ public class StructClass extends StructMember {
     return recordAttr.getComponents();
   }
 
+  public List<String> getPermittedSubclasses() {
+    StructPermittedSubclassesAttribute permittedSubClassAttr = getAttribute(StructGeneralAttribute.ATTRIBUTE_PERMITTED_SUBCLASSES);
+    if (permittedSubClassAttr == null) return null;
+    return permittedSubClassAttr.getClasses();
+  }
+
   public int[] getInterfaces() {
     return interfaces;
   }
diff --git a/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/struct/attr/StructGeneralAttribute.java b/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/struct/attr/StructGeneralAttribute.java
index 6239ee41c24e..898ef9f2f7ea 100644
--- a/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/struct/attr/StructGeneralAttribute.java
+++ b/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/struct/attr/StructGeneralAttribute.java
@@ -1,4 +1,4 @@
-// Copyright 2000-2021 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package org.jetbrains.java.decompiler.struct.attr;
 
 import org.jetbrains.java.decompiler.struct.consts.ConstantPool;
@@ -36,6 +36,7 @@ public class StructGeneralAttribute {
   public static final Key<StructMethodParametersAttribute> ATTRIBUTE_METHOD_PARAMETERS = new Key<>("MethodParameters");
   public static final Key<StructModuleAttribute> ATTRIBUTE_MODULE = new Key<>("Module");
   public static final Key<StructRecordAttribute> ATTRIBUTE_RECORD = new Key<>("Record");
+  public static final Key<StructPermittedSubclassesAttribute> ATTRIBUTE_PERMITTED_SUBCLASSES = new Key<>("PermittedSubclasses");
 
   @SuppressWarnings("unused")
   public static class Key<T extends StructGeneralAttribute> {
@@ -100,6 +101,8 @@ public class StructGeneralAttribute {
     }
     else if (ATTRIBUTE_RECORD.name.equals(name)) {
       return new StructRecordAttribute();
+    } else if (ATTRIBUTE_PERMITTED_SUBCLASSES.name.equals(name)) {
+      return new StructPermittedSubclassesAttribute();
     }
     else {
       return null; // unsupported attribute
diff --git a/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/struct/attr/StructPermittedSubclassesAttribute.java b/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/struct/attr/StructPermittedSubclassesAttribute.java
new file mode 100644
index 000000000000..848418bbc785
--- /dev/null
+++ b/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/struct/attr/StructPermittedSubclassesAttribute.java
@@ -0,0 +1,35 @@
+// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+package org.jetbrains.java.decompiler.struct.attr;
+
+import org.jetbrains.java.decompiler.struct.consts.ConstantPool;
+import org.jetbrains.java.decompiler.util.DataInputFullStream;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+
+/*
+  PermittedSubclasses_attribute {
+      u2 attribute_name_index;
+      u4 attribute_length;
+      u2 number_of_classes;
+      u2 classes[number_of_classes];
+  }
+ */
+public class StructPermittedSubclassesAttribute extends StructGeneralAttribute {
+  List<String> classes;
+
+  @Override
+  public void initContent(DataInputFullStream data, ConstantPool pool) throws IOException {
+    int numberOfClasses = data.readUnsignedShort();
+    String[] classes = new String[numberOfClasses];
+    for (int i = 0; i < numberOfClasses; i++) {
+      classes[i] = pool.getPrimitiveConstant(data.readUnsignedShort()).getString();
+    }
+    this.classes = Arrays.asList(classes);
+  }
+
+  public List<String> getClasses() {
+    return classes;
+  }
+}
diff --git a/plugins/java-decompiler/engine/test/org/jetbrains/java/decompiler/SingleClassesTest.java b/plugins/java-decompiler/engine/test/org/jetbrains/java/decompiler/SingleClassesTest.java
index f84a02d0b202..1c346d4eae42 100644
--- a/plugins/java-decompiler/engine/test/org/jetbrains/java/decompiler/SingleClassesTest.java
+++ b/plugins/java-decompiler/engine/test/org/jetbrains/java/decompiler/SingleClassesTest.java
@@ -147,6 +147,24 @@ public class SingleClassesTest {
   @Test public void testRecordVararg() { doTest("records/TestRecordVararg"); }
   @Test public void testRecordGenericVararg() { doTest("records/TestRecordGenericVararg"); }
   @Test public void testRecordAnno() { doTest("records/TestRecordAnno"); }
+  @Test public void testRootWithClassInner() { doTest("sealed/RootWithClassInner"); }
+  @Test public void testRootWithInterfaceInner() { doTest("sealed/RootWithInterfaceInner"); }
+  @Test public void testRootWithClassOuter() { doTest("sealed/RootWithClassOuter",
+    "sealed/ClassExtends", "sealed/ClassNonSealed", "sealed/ClassNonSealedExtendsImplements");
+  }
+  @Test public void testRootWithInterfaceOuter() { doTest("sealed/RootWithInterfaceOuter",
+    "sealed/ClassImplements", "sealed/InterfaceNonSealed", "sealed/ClassNonSealedExtendsImplements");
+  }
+  @Test public void testClassNonSealed() { doTest("sealed/ClassNonSealed",
+    "sealed/RootWithClassOuter", "sealed/ClassExtends", "sealed/ClassNonSealedExtendsImplements");
+  }
+  @Test public void testClassNonSealedExtendsImplements() { doTest("sealed/ClassNonSealedExtendsImplements",
+    "sealed/RootWithClassOuter", "sealed/ClassExtends", "sealed/ClassNonSealed");
+  }
+  @Test public void testInterfaceNonSealed() { doTest("sealed/InterfaceNonSealed",
+    "sealed/RootWithInterfaceOuter", "sealed/ClassImplements", "sealed/ClassNonSealedExtendsImplements");
+  }
+  @Test public void testRootWithModule() { doTest("sealed/foo/RootWithModule", "sealed/bar/BarClassExtends");}
   @Test public void testInheritanceChainCycle() { doTest("pkg/TestInheritanceChainCycle"); }
   @Test public void testDynamicConstantPoolEntry() { doTest("java11/TestDynamicConstantPoolEntry"); }
 
diff --git a/plugins/java-decompiler/engine/testData/classes/sealed/ClassExtends.class b/plugins/java-decompiler/engine/testData/classes/sealed/ClassExtends.class
new file mode 100644
index 000000000000..b153738d028c
Binary files /dev/null and b/plugins/java-decompiler/engine/testData/classes/sealed/ClassExtends.class differ
diff --git a/plugins/java-decompiler/engine/testData/classes/sealed/ClassImplements.class b/plugins/java-decompiler/engine/testData/classes/sealed/ClassImplements.class
new file mode 100644
index 000000000000..6576356f25df
Binary files /dev/null and b/plugins/java-decompiler/engine/testData/classes/sealed/ClassImplements.class differ
diff --git a/plugins/java-decompiler/engine/testData/classes/sealed/ClassNonSealed.class b/plugins/java-decompiler/engine/testData/classes/sealed/ClassNonSealed.class
new file mode 100644
index 000000000000..fcb5e012e85f
Binary files /dev/null and b/plugins/java-decompiler/engine/testData/classes/sealed/ClassNonSealed.class differ
diff --git a/plugins/java-decompiler/engine/testData/classes/sealed/ClassNonSealedExtendsImplements.class b/plugins/java-decompiler/engine/testData/classes/sealed/ClassNonSealedExtendsImplements.class
new file mode 100644
index 000000000000..cd97721aa387
Binary files /dev/null and b/plugins/java-decompiler/engine/testData/classes/sealed/ClassNonSealedExtendsImplements.class differ
diff --git a/plugins/java-decompiler/engine/testData/classes/sealed/InterfaceNonSealed.class b/plugins/java-decompiler/engine/testData/classes/sealed/InterfaceNonSealed.class
new file mode 100644
index 000000000000..a74bbfd72d10
Binary files /dev/null and b/plugins/java-decompiler/engine/testData/classes/sealed/InterfaceNonSealed.class differ
diff --git a/plugins/java-decompiler/engine/testData/classes/sealed/RootWithClassInner$Inner.class b/plugins/java-decompiler/engine/testData/classes/sealed/RootWithClassInner$Inner.class
new file mode 100644
index 000000000000..d7e5a2112eaa
Binary files /dev/null and b/plugins/java-decompiler/engine/testData/classes/sealed/RootWithClassInner$Inner.class differ
diff --git a/plugins/java-decompiler/engine/testData/classes/sealed/RootWithClassInner.class b/plugins/java-decompiler/engine/testData/classes/sealed/RootWithClassInner.class
new file mode 100644
index 000000000000..0d6aa19c9a9f
Binary files /dev/null and b/plugins/java-decompiler/engine/testData/classes/sealed/RootWithClassInner.class differ
diff --git a/plugins/java-decompiler/engine/testData/classes/sealed/RootWithClassOuter.class b/plugins/java-decompiler/engine/testData/classes/sealed/RootWithClassOuter.class
new file mode 100644
index 000000000000..9f9125504e60
Binary files /dev/null and b/plugins/java-decompiler/engine/testData/classes/sealed/RootWithClassOuter.class differ
diff --git a/plugins/java-decompiler/engine/testData/classes/sealed/RootWithInterfaceInner$Inner.class b/plugins/java-decompiler/engine/testData/classes/sealed/RootWithInterfaceInner$Inner.class
new file mode 100644
index 000000000000..2fad668da34f
Binary files /dev/null and b/plugins/java-decompiler/engine/testData/classes/sealed/RootWithInterfaceInner$Inner.class differ
diff --git a/plugins/java-decompiler/engine/testData/classes/sealed/RootWithInterfaceInner.class b/plugins/java-decompiler/engine/testData/classes/sealed/RootWithInterfaceInner.class
new file mode 100644
index 000000000000..f5fb80a2c3f2
Binary files /dev/null and b/plugins/java-decompiler/engine/testData/classes/sealed/RootWithInterfaceInner.class differ
diff --git a/plugins/java-decompiler/engine/testData/classes/sealed/RootWithInterfaceOuter.class b/plugins/java-decompiler/engine/testData/classes/sealed/RootWithInterfaceOuter.class
new file mode 100644
index 000000000000..bef6fe4ff8d8
Binary files /dev/null and b/plugins/java-decompiler/engine/testData/classes/sealed/RootWithInterfaceOuter.class differ
diff --git a/plugins/java-decompiler/engine/testData/classes/sealed/bar/BarClassExtends.class b/plugins/java-decompiler/engine/testData/classes/sealed/bar/BarClassExtends.class
new file mode 100644
index 000000000000..a6a0f0863742
Binary files /dev/null and b/plugins/java-decompiler/engine/testData/classes/sealed/bar/BarClassExtends.class differ
diff --git a/plugins/java-decompiler/engine/testData/classes/sealed/foo/RootWithModule.class b/plugins/java-decompiler/engine/testData/classes/sealed/foo/RootWithModule.class
new file mode 100644
index 000000000000..fc12fd982b55
Binary files /dev/null and b/plugins/java-decompiler/engine/testData/classes/sealed/foo/RootWithModule.class differ
diff --git a/plugins/java-decompiler/engine/testData/results/ClassNonSealed.dec b/plugins/java-decompiler/engine/testData/results/ClassNonSealed.dec
new file mode 100644
index 000000000000..a03c12c5d9a2
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/results/ClassNonSealed.dec
@@ -0,0 +1,5 @@
+package sealed;
+
+non-sealed class ClassNonSealed extends RootWithClassOuter {
+}
+
diff --git a/plugins/java-decompiler/engine/testData/results/ClassNonSealedExtendsImplements.dec b/plugins/java-decompiler/engine/testData/results/ClassNonSealedExtendsImplements.dec
new file mode 100644
index 000000000000..641302474900
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/results/ClassNonSealedExtendsImplements.dec
@@ -0,0 +1,5 @@
+package sealed;
+
+non-sealed class ClassNonSealedExtendsImplements extends RootWithClassOuter implements RootWithInterfaceOuter {
+}
+
diff --git a/plugins/java-decompiler/engine/testData/results/InterfaceNonSealed.dec b/plugins/java-decompiler/engine/testData/results/InterfaceNonSealed.dec
new file mode 100644
index 000000000000..0fd51b00b7fa
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/results/InterfaceNonSealed.dec
@@ -0,0 +1,5 @@
+package sealed;
+
+non-sealed interface InterfaceNonSealed extends RootWithInterfaceOuter {
+}
+
diff --git a/plugins/java-decompiler/engine/testData/results/RootWithClassInner.dec b/plugins/java-decompiler/engine/testData/results/RootWithClassInner.dec
new file mode 100644
index 000000000000..340dd2761eb0
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/results/RootWithClassInner.dec
@@ -0,0 +1,7 @@
+package sealed;
+
+sealed class RootWithClassInner {
+   static final class Inner extends RootWithClassInner {
+   }
+}
+
diff --git a/plugins/java-decompiler/engine/testData/results/RootWithClassOuter.dec b/plugins/java-decompiler/engine/testData/results/RootWithClassOuter.dec
new file mode 100644
index 000000000000..8893d630b069
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/results/RootWithClassOuter.dec
@@ -0,0 +1,5 @@
+package sealed;
+
+abstract sealed class RootWithClassOuter permits ClassExtends, ClassNonSealed, ClassNonSealedExtendsImplements {
+}
+
diff --git a/plugins/java-decompiler/engine/testData/results/RootWithInterfaceInner.dec b/plugins/java-decompiler/engine/testData/results/RootWithInterfaceInner.dec
new file mode 100644
index 000000000000..c7346d0149c3
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/results/RootWithInterfaceInner.dec
@@ -0,0 +1,7 @@
+package sealed;
+
+sealed interface RootWithInterfaceInner {
+   public static final class Inner implements RootWithInterfaceInner {
+   }
+}
+
diff --git a/plugins/java-decompiler/engine/testData/results/RootWithInterfaceOuter.dec b/plugins/java-decompiler/engine/testData/results/RootWithInterfaceOuter.dec
new file mode 100644
index 000000000000..47a9b5dac67c
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/results/RootWithInterfaceOuter.dec
@@ -0,0 +1,5 @@
+package sealed;
+
+sealed interface RootWithInterfaceOuter permits ClassImplements, InterfaceNonSealed, ClassNonSealedExtendsImplements {
+}
+
diff --git a/plugins/java-decompiler/engine/testData/results/RootWithModule.dec b/plugins/java-decompiler/engine/testData/results/RootWithModule.dec
new file mode 100644
index 000000000000..b77cb9f14399
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/results/RootWithModule.dec
@@ -0,0 +1,7 @@
+package sealed.foo;
+
+import sealed.bar.BarClassExtends;
+
+public abstract sealed class RootWithModule permits BarClassExtends {
+}
+
diff --git a/plugins/java-decompiler/engine/testData/src/sealed/ClassExtends.java b/plugins/java-decompiler/engine/testData/src/sealed/ClassExtends.java
new file mode 100644
index 000000000000..8f2c13f3a73c
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/src/sealed/ClassExtends.java
@@ -0,0 +1,4 @@
+package sealed;
+
+final class ClassExtends extends RootWithClassOuter {
+}
\ No newline at end of file
diff --git a/plugins/java-decompiler/engine/testData/src/sealed/ClassImplements.java b/plugins/java-decompiler/engine/testData/src/sealed/ClassImplements.java
new file mode 100644
index 000000000000..453f8415fa03
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/src/sealed/ClassImplements.java
@@ -0,0 +1,4 @@
+package sealed;
+
+final class FinalImplements implements RootWithInterfaceOuter {
+}
diff --git a/plugins/java-decompiler/engine/testData/src/sealed/ClassNonSealed.java b/plugins/java-decompiler/engine/testData/src/sealed/ClassNonSealed.java
new file mode 100644
index 000000000000..9474dc34d45b
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/src/sealed/ClassNonSealed.java
@@ -0,0 +1,4 @@
+package sealed;
+
+non-sealed class ClassNonSealed extends RootWithClassOuter {
+}
\ No newline at end of file
diff --git a/plugins/java-decompiler/engine/testData/src/sealed/ClassNonSealedImplements.java b/plugins/java-decompiler/engine/testData/src/sealed/ClassNonSealedImplements.java
new file mode 100644
index 000000000000..05683a1216b8
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/src/sealed/ClassNonSealedImplements.java
@@ -0,0 +1,4 @@
+package sealed;
+
+non-sealed class ClassNonSealedImplements extends RootWithClassOuter implements RootWithInterfaceOuter {
+}
\ No newline at end of file
diff --git a/plugins/java-decompiler/engine/testData/src/sealed/InterfaceNonSealed.java b/plugins/java-decompiler/engine/testData/src/sealed/InterfaceNonSealed.java
new file mode 100644
index 000000000000..4b79bd8f1c40
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/src/sealed/InterfaceNonSealed.java
@@ -0,0 +1,4 @@
+package sealed;
+
+non-sealed interface InterfaceNonSealed extends RootWithInterfaceOuter {
+}
\ No newline at end of file
diff --git a/plugins/java-decompiler/engine/testData/src/sealed/RootWithClassInner.java b/plugins/java-decompiler/engine/testData/src/sealed/RootWithClassInner.java
new file mode 100644
index 000000000000..123872914972
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/src/sealed/RootWithClassInner.java
@@ -0,0 +1,6 @@
+package sealed;
+
+sealed interface RootWithClassInner {
+  final class Inner implements RootWithClassInner {
+  }
+}
\ No newline at end of file
diff --git a/plugins/java-decompiler/engine/testData/src/sealed/RootWithClassOuter.java b/plugins/java-decompiler/engine/testData/src/sealed/RootWithClassOuter.java
new file mode 100644
index 000000000000..f905293a770a
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/src/sealed/RootWithClassOuter.java
@@ -0,0 +1,4 @@
+package sealed;
+
+abstract sealed class RootWithClassOuter permits ClassExtends, ClassNonSealed, ClassNonSealedImplements {
+}
\ No newline at end of file
diff --git a/plugins/java-decompiler/engine/testData/src/sealed/RootWithInterfaceInner.java b/plugins/java-decompiler/engine/testData/src/sealed/RootWithInterfaceInner.java
new file mode 100644
index 000000000000..63d6960cdadb
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/src/sealed/RootWithInterfaceInner.java
@@ -0,0 +1,6 @@
+package sealed;
+
+sealed interface RootWithInterfaceInner {
+  final class Inner implements RootWithInterfaceInner {
+  }
+}
\ No newline at end of file
diff --git a/plugins/java-decompiler/engine/testData/src/sealed/RootWithInterfaceOuter.java b/plugins/java-decompiler/engine/testData/src/sealed/RootWithInterfaceOuter.java
new file mode 100644
index 000000000000..e29d379886f0
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/src/sealed/RootWithInterfaceOuter.java
@@ -0,0 +1,4 @@
+package sealed;
+
+sealed interface RootWithInterfaceOuter permits FinalImplements, InterfaceNonSealed, ClassNonSealedImplements {
+}
\ No newline at end of file
diff --git a/plugins/java-decompiler/engine/testData/src/sealed/bar/BarClassExtends.java b/plugins/java-decompiler/engine/testData/src/sealed/bar/BarClassExtends.java
new file mode 100644
index 000000000000..7d373c334b98
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/src/sealed/bar/BarClassExtends.java
@@ -0,0 +1,6 @@
+package sealed.bar;
+
+import sealed.foo.RootWithModule;
+
+final public class BarClassExtends extends RootWithModule {
+}
\ No newline at end of file
diff --git a/plugins/java-decompiler/engine/testData/src/sealed/foo/RootWithModule.java b/plugins/java-decompiler/engine/testData/src/sealed/foo/RootWithModule.java
new file mode 100644
index 000000000000..d8034d7f3226
--- /dev/null
+++ b/plugins/java-decompiler/engine/testData/src/sealed/foo/RootWithModule.java
@@ -0,0 +1,6 @@
+package sealed.foo;
+
+import sealed.bar.BarClassExtends;
+
+public abstract sealed class RootWithModule permits BarClassExtends {
+}
\ No newline at end of file