diff --git a/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/refactoring/ChangeMethodParametersRefactoringAction.java b/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/refactoring/ChangeMethodParametersRefactoringAction.java
new file mode 100644
index 000000000000..a01e58c050f9
--- /dev/null
+++ b/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/refactoring/ChangeMethodParametersRefactoringAction.java
@@ -0,0 +1,79 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.netbeans.modules.java.lsp.server.refactoring;
+
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.io.IOException;
+import javax.lang.model.element.Element;
+import javax.lang.model.element.ElementKind;
+import javax.lang.model.element.ExecutableElement;
+import org.netbeans.api.java.source.ElementHandle;
+import org.netbeans.api.java.source.JavaSource;
+import org.openide.awt.ActionID;
+import org.openide.awt.ActionReference;
+import org.openide.awt.ActionRegistration;
+import org.openide.filesystems.FileObject;
+import org.openide.util.NbBundle.Messages;
+
+@ActionID(
+        category = "Refactoring",
+        id = "org.netbeans.modules.java.lsp.server.refactoring.ChangeMethodParametersRefactoringAction"
+)
+@ActionRegistration(
+        iconBase = "org/netbeans/modules/java/lsp/server/refactoring/newHTML.png",
+        displayName = "#CTL_ChangeMethodParametersRefactoringAction"
+)
+@ActionReference(path = "Menu/Refactoring", position = 1120)
+@Messages("CTL_ChangeMethodParametersRefactoringAction=Change Method Parameters Refactoring")
+public final class ChangeMethodParametersRefactoringAction implements ActionListener {
+    private final FileObject file;
+
+    public ChangeMethodParametersRefactoringAction(FileObject file) {
+        this.file = file;
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent evt) {
+        JavaSource js = JavaSource.forFileObject(file);
+        if (js != null) {
+            try {
+                js.runUserActionTask(ci -> {
+                    ci.toPhase(JavaSource.Phase.ELEMENTS_RESOLVED);
+                    ExecutableElement method = null;
+                    METHOD: for (Element type : ci.getTopLevelElements()) {
+                        for (Element e : type.getEnclosedElements()) {
+                            System.err.println("e: " + e);
+                            if (e.getKind() == ElementKind.METHOD) {
+                                method = (ExecutableElement) e;
+                                break METHOD;
+                            }
+                        }
+                    }
+                    if (method != null) {
+                        ElementHandle<ExecutableElement> handle = ElementHandle.create(method);
+                        Pages.showChangeMethodParametersUI(ci, null, file, handle, method);
+                    }
+                }, true);
+            } catch (IOException ex) {
+                throw new IllegalStateException(ex);
+            }
+        }
+    }
+}
diff --git a/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/refactoring/newHTML.png b/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/refactoring/newHTML.png
new file mode 100644
index 000000000000..608de64f86ce
Binary files /dev/null and b/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/refactoring/newHTML.png differ
diff --git a/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/refactoring/ui/TestHtmlUI.html b/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/refactoring/ui/TestHtmlUI.html
new file mode 100644
index 000000000000..747fe464be71
--- /dev/null
+++ b/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/refactoring/ui/TestHtmlUI.html
@@ -0,0 +1,45 @@
+<!--
+
+    Licensed to the Apache Software Foundation (ASF) under one
+    or more contributor license agreements.  See the NOTICE file
+    distributed with this work for additional information
+    regarding copyright ownership.  The ASF licenses this file
+    to you under the Apache License, Version 2.0 (the
+    "License"); you may not use this file except in compliance
+    with the License.  You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing,
+    software distributed under the License is distributed on an
+    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+    KIND, either express or implied.  See the License for the
+    specific language governing permissions and limitations
+    under the License.
+
+-->
+<html>
+    <head>
+        <title>TestHtmlUI</title>
+        <meta charset="UTF-8">
+    </head>
+    <body>
+        <div data-bind="template: templateName"></div>
+
+        <!-- UI of the main window -->
+        <script type="text/html" id="window">
+            <input data-bind="textInput: text"></input> 
+            <button data-bind="click: showDialog, enable: text">Ask!</button>
+        </script>
+
+        <!-- UI of the dialog -->
+        <script type="text/html" id="dialog">
+            <div><span data-bind="text: text"></span> How are you?</div>
+            <!-- you need to check the checkbox to enabled the OK button -->
+            <input type="checkbox" data-bind="checked: ok">OK?<br>
+            <!-- next button is enabled when the checkbox is checked -->
+            <button id='OK' hidden data-bind="enable: ok">Good</button>
+            <button id='BAD' hidden>Bad</button>
+        </script>
+    </body>
+</html>
\ No newline at end of file
diff --git a/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/refactoring/ui/TestHtmlUICntrl.java b/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/refactoring/ui/TestHtmlUICntrl.java
new file mode 100644
index 000000000000..c33fb93b9068
--- /dev/null
+++ b/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/refactoring/ui/TestHtmlUICntrl.java
@@ -0,0 +1,90 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.netbeans.modules.java.lsp.server.refactoring.ui;
+
+import net.java.html.json.Model;
+import net.java.html.json.Function;
+import net.java.html.json.Property;
+import net.java.html.json.ComputedProperty;
+import org.netbeans.api.htmlui.OpenHTMLRegistration;
+import org.netbeans.api.htmlui.HTMLDialog;
+import org.openide.util.NbBundle;
+import org.openide.awt.ActionID;
+import org.openide.awt.ActionReference;
+import org.openide.awt.ActionReferences;
+
+/**
+ * HTML page which displays a window and also a dialog.
+ */
+@Model(className = "TestHtmlUI", targetId = "", properties = {
+    @Property(name = "text", type = String.class)
+})
+public final class TestHtmlUICntrl {
+
+    @ComputedProperty
+    static String templateName() {
+        return "window";
+    }
+
+    @Function
+    static void showDialog(TestHtmlUI model) {
+        String reply = Pages.showTestHtmlUIDialog(model.getText());
+        if ("OK".equals(reply)) {
+            model.setText("Happy World!");
+        } else {
+            model.setText("Sad World!");
+        }
+    }
+
+    @ActionID(
+            category = "Tools",
+            id = "org.netbeans.modules.java.lsp.server.refactoring.ui.TestHtmlUI"
+    )
+    @ActionReferences({
+        @ActionReference(path = "Menu/Refactoring", position = 1125)
+    })
+    @NbBundle.Messages("CTL_TestHtmlUI=Open HTML Hello World!")
+    @OpenHTMLRegistration(
+            url = "TestHtmlUI.html",
+            displayName = "#CTL_TestHtmlUI"
+    //, iconBase="SET/PATH/TO/ICON/HERE"
+    )
+    public static TestHtmlUI onPageLoad() {
+        return new TestHtmlUI("Hello World!").applyBindings();
+    }
+
+    //
+    // dialog UI
+    // 
+    @HTMLDialog(url = "TestHtmlUI.html")
+    static void showTestHtmlUIDialog(String t) {
+        new TestHtmlUIDialog(t, false).applyBindings();
+    }
+
+    @Model(className = "TestHtmlUIDialog", targetId = "", properties = {
+        @Property(name = "text", type = String.class),
+        @Property(name = "ok", type = boolean.class),})
+    static final class DialogCntrl {
+
+        @ComputedProperty
+        static String templateName() {
+            return "dialog";
+        }
+    }
+}