diff --git a/src/de/inetsoftware/jwebassembly/module/nativecode/ReplacementForClass.java b/src/de/inetsoftware/jwebassembly/module/nativecode/ReplacementForClass.java
index c48478c..0136ccd 100644
--- a/src/de/inetsoftware/jwebassembly/module/nativecode/ReplacementForClass.java
+++ b/src/de/inetsoftware/jwebassembly/module/nativecode/ReplacementForClass.java
@@ -1,5 +1,5 @@
 /*
-   Copyright 2020 Volker Berlin (i-net software)
+   Copyright 2020 - 2021 Volker Berlin (i-net software)
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
@@ -39,6 +39,7 @@ import de.inetsoftware.jwebassembly.module.TypeManager;
 /**
  * Replacement for java.lang.Class
  *
+ * @param <T> the type of the class modeled by this {@code Class}
  * @author Volker Berlin
  */
 @Replace( "java/lang/Class" )
@@ -59,15 +60,6 @@ class ReplacementForClass<T> {
         this.vtable = vtable;
     }
 
-    /**
-     * Replacement for {@link Class#getName()}
-     * 
-     * @return the name
-     */
-    public String getName() {
-        return StringTable.stringConstant( getIntFromMemory( vtable + TYPE_DESCRIPTION_TYPE_NAME ) );
-    }
-
     /**
      * Replacement for {@link Object#getClass()}. The documentation of the memory of the type description is done in method:
      * {@link TypeManager.StructType#writeToStream(java.io.ByteArrayOutputStream, java.util.function.ToIntFunction)}
@@ -179,6 +171,24 @@ class ReplacementForClass<T> {
                     "return" )
     private static native int getIntFromMemory( int pos );
 
+    /**
+     * Replacement of the Java methods isArray()
+     * @return {@code true} if this object represents an array class;
+     */
+    public boolean isArray() {
+        int classIdx = getIntFromMemory( vtable + TYPE_DESCRIPTION_ARRAY_TYPE );
+        return classIdx >= 0;
+    }
+
+    /**
+     * Replacement for {@link Class#getName()}
+     * 
+     * @return the name
+     */
+    public String getName() {
+        return StringTable.stringConstant( getIntFromMemory( vtable + TYPE_DESCRIPTION_TYPE_NAME ) );
+    }
+
     /**
      * Replacement of the Java methods
      */
@@ -187,7 +197,7 @@ class ReplacementForClass<T> {
     }
 
     /**
-     * Replacement of the Java methods
+     * Replacement of the Java methods getClassLoader0()
      */
     ClassLoader getClassLoader0() {
         return null;
diff --git a/test/de/inetsoftware/jwebassembly/runtime/ArrayOperations.java b/test/de/inetsoftware/jwebassembly/runtime/ArrayOperations.java
index 3a0f652..c9f29b5 100644
--- a/test/de/inetsoftware/jwebassembly/runtime/ArrayOperations.java
+++ b/test/de/inetsoftware/jwebassembly/runtime/ArrayOperations.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2018 - 2019 Volker Berlin (i-net software)
+ * Copyright 2018 - 2021 Volker Berlin (i-net software)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -85,6 +85,8 @@ public class ArrayOperations extends AbstractBaseTest {
             addParam( list, script, "booleanArrayComponentTypeClassName" );
             addParam( list, script, "objectArrayComponentTypeClassName" );
             addParam( list, script, "arrayNewInstance_getLength" );
+            addParam( list, script, "isArrayOfArray" );
+            addParam( list, script, "isArrayOfObject" );
         }
         rule.setTestParameters( list );
         return list;
@@ -328,5 +330,19 @@ public class ArrayOperations extends AbstractBaseTest {
             Object obj = Array.newInstance( byte.class, 42 );
             return Array.getLength( obj );
         }
+
+        @Export
+        static boolean isArrayOfArray() {
+            Object obj = new Object[42];
+            Class<?> clazz = obj.getClass();
+            return clazz.isArray();
+        }
+
+        @Export
+        static boolean isArrayOfObject() {
+            Object obj = new Object();
+            Class<?> clazz = obj.getClass();
+            return clazz.isArray();
+        }
     }
 }