diff --git a/java/java-impl/src/com/intellij/pom/java/AcceptedLanguageLevelsSettings.java b/java/java-impl/src/com/intellij/pom/java/AcceptedLanguageLevelsSettings.java
index bb7cf6c84020..fec689dd1eff 100644
--- a/java/java-impl/src/com/intellij/pom/java/AcceptedLanguageLevelsSettings.java
+++ b/java/java-impl/src/com/intellij/pom/java/AcceptedLanguageLevelsSettings.java
@@ -12,7 +12,10 @@ import com.intellij.openapi.roots.LanguageLevelModuleExtensionImpl;
 import com.intellij.openapi.roots.LanguageLevelProjectExtension;
 import com.intellij.openapi.startup.StartupActivity;
 import com.intellij.openapi.startup.StartupManager;
+import com.intellij.openapi.ui.DialogWrapper;
 import com.intellij.openapi.ui.Messages;
+import com.intellij.openapi.util.text.StringUtil;
+import com.intellij.ui.components.LegalNoticeDialog;
 import com.intellij.util.containers.ContainerUtil;
 import com.intellij.util.ui.UIUtil;
 import com.intellij.util.xmlb.XmlSerializerUtil;
@@ -65,7 +68,7 @@ public class AcceptedLanguageLevelsSettings implements PersistentStateComponent<
     return LanguageLevel.HIGHEST.compareTo(languageLevel) >= 0 || getSettings().acceptedNames.contains(languageLevel.name());
   }
 
-  public static void acceptLanguageLevel(LanguageLevel languageLevel) {
+  private static void acceptLanguageLevel(LanguageLevel languageLevel) {
     getSettings().acceptedNames.add(languageLevel.name());
   }
 
@@ -98,21 +101,32 @@ public class AcceptedLanguageLevelsSettings implements PersistentStateComponent<
   }
 
   /**
-   * Show legal dialog and set highest accepted level if dialog is rejected
+   * Shows a legal notice dialog and downgrades to the highest accepted level if the dialog is rejected.
    *
    * @return {@code null} if level was rejected
    */
   public static LanguageLevel checkAccepted(Component parent, LanguageLevel level) {
-    return level == null || isLanguageLevelAccepted(level) || new LegalNoticeDialog(parent, level).showAndGet() ? level : null;
+    return level == null || isLanguageLevelAccepted(level) || showDialog(parent, level) ? level : null;
   }
 
-  private static Notification createNotification(LanguageLevel l, Project project) {
-    String content = LegalNoticeDialog.getLegalNotice(l) + "<br/><a href='accept'>Accept</a>&nbsp;&nbsp;<a href='decline'>Decline</a>";
+  private static boolean showDialog(Component parent, LanguageLevel level) {
+    int result = LegalNoticeDialog.build(EXPERIMENTAL_FEATURE_ALERT, getLegalNotice(level)).withParent(parent).show();
+    if (result == DialogWrapper.OK_EXIT_CODE) {
+      acceptLanguageLevel(level);
+      return true;
+    }
+    else {
+      return false;
+    }
+  }
+
+  private static Notification createNotification(LanguageLevel level, Project project) {
+    String content = getLegalNotice(level) + "<br/><a href='accept'>Accept</a>&nbsp;&nbsp;<a href='decline'>Decline</a>";
     return NOTIFICATION_GROUP.createNotification(
-      LegalNoticeDialog.EXPERIMENTAL_FEATURE_ALERT, content, NotificationType.WARNING, (notification, event) -> {
+      EXPERIMENTAL_FEATURE_ALERT, content, NotificationType.WARNING, (notification, event) -> {
         if (event.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
           switch (event.getDescription()) {
-            case "accept": acceptLanguageLevel(l); break;
+            case "accept": acceptLanguageLevel(level); break;
             case "decline": decreaseLanguageLevel(project); break;
           }
           notification.expire();
@@ -122,7 +136,7 @@ public class AcceptedLanguageLevelsSettings implements PersistentStateComponent<
 
   private static void decreaseLanguageLevel(Project project) {
     String message = UIUtil.toHtml("Support for experimental features was rejected.<br/>Language levels would be decreased accordingly");
-    Messages.showErrorDialog(project, message, LegalNoticeDialog.EXPERIMENTAL_FEATURE_ALERT);
+    Messages.showErrorDialog(project, message, EXPERIMENTAL_FEATURE_ALERT);
 
     WriteAction.run(() -> {
       LanguageLevel highestAcceptedLevel = getHighestAcceptedLevel();
@@ -141,4 +155,14 @@ public class AcceptedLanguageLevelsSettings implements PersistentStateComponent<
       }
     });
   }
+
+  private static final String EXPERIMENTAL_FEATURE_ALERT = "Experimental Feature Alert";
+
+  private static String getLegalNotice(LanguageLevel level) {
+    return
+      "You must accept the terms of legal notice of the beta Java specification to enable support for " +
+      "\"" + StringUtil.substringAfter(level.getPresentableText(), " - ") + "\".<br/><br/>" +
+      "<b>The implementation of an early-draft specification developed under the Java Community Process (JCP) " +
+      "is made available for testing and evaluation purposes only and is not compatible with any specification of the JCP.</b>";
+  }
 }
\ No newline at end of file
diff --git a/java/java-impl/src/com/intellij/pom/java/LegalNoticeDialog.java b/java/java-impl/src/com/intellij/pom/java/LegalNoticeDialog.java
deleted file mode 100644
index ad41c85cbc0b..000000000000
--- a/java/java-impl/src/com/intellij/pom/java/LegalNoticeDialog.java
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright 2000-2018 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.
-package com.intellij.pom.java;
-
-import com.intellij.icons.AllIcons;
-import com.intellij.openapi.ui.DialogWrapper;
-import com.intellij.openapi.util.text.StringUtil;
-import com.intellij.ui.components.JBLabel;
-import com.intellij.util.ui.JBUI;
-import com.intellij.util.ui.UIUtil;
-import org.jetbrains.annotations.Nullable;
-
-import javax.swing.*;
-import java.awt.*;
-
-class LegalNoticeDialog extends DialogWrapper {
-  static final String EXPERIMENTAL_FEATURE_ALERT = "Experimental Feature Alert";
-  private final LanguageLevel myLanguageLevel;
-
-  public LegalNoticeDialog(Component parentComponent, LanguageLevel languageLevel) {
-    super(parentComponent, false);
-    myLanguageLevel = languageLevel;
-    setTitle(EXPERIMENTAL_FEATURE_ALERT);
-    init();
-    setOKButtonText("Accept");
-    setCancelButtonText("Decline");
-    pack();
-  }
-
-  @Nullable
-  @Override
-  protected JComponent createCenterPanel() {
-    JPanel panel = new JPanel(new BorderLayout());
-    JPanel iconPanel = new JPanel(new BorderLayout());
-    iconPanel.add(new JBLabel(AllIcons.General.WarningDialog), BorderLayout.NORTH);
-    iconPanel.setBorder(JBUI.Borders.emptyRight(2));
-    panel.add(iconPanel, BorderLayout.WEST);
-    JEditorPane message = new JEditorPane();
-    message.setEditorKit(UIUtil.getHTMLEditorKit());
-    message.setEditable(false);
-    message.setBackground(UIUtil.getOptionPaneBackground());
-    message.setPreferredSize(JBUI.size(500, 100));
-    message.setText(UIUtil.toHtml(getLegalNotice(myLanguageLevel)));
-    panel.add(message, BorderLayout.CENTER);
-    return panel;
-  }
-
-  static String getLegalNotice(LanguageLevel languageLevel) {
-    return
-      "You must accept the terms of legal notice of the beta Java specification to enable support for \"" +
-      StringUtil.substringAfter(languageLevel.getPresentableText(), " - ") +
-      "\".<br/><br/>" +
-      "<b>The implementation of an early-draft specification developed under the Java Community Process (JCP) " +
-      "is made available for testing and evaluation purposes only and is not compatible with any specification of the JCP.</b>";
-  }
-
-  @Override
-  protected void doOKAction() {
-    AcceptedLanguageLevelsSettings.acceptLanguageLevel(myLanguageLevel);
-    super.doOKAction();
-  }
-}
\ No newline at end of file
diff --git a/platform/platform-impl/src/com/intellij/ui/components/LegalNoticeDialog.java b/platform/platform-impl/src/com/intellij/ui/components/LegalNoticeDialog.java
new file mode 100644
index 000000000000..88a60f2b27e0
--- /dev/null
+++ b/platform/platform-impl/src/com/intellij/ui/components/LegalNoticeDialog.java
@@ -0,0 +1,118 @@
+// Copyright 2000-2018 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.
+package com.intellij.ui.components;
+
+import com.intellij.CommonBundle;
+import com.intellij.icons.AllIcons;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.ui.DialogWrapper;
+import com.intellij.openapi.util.Pair;
+import com.intellij.ui.Gray;
+import com.intellij.util.ui.JBUI;
+import com.intellij.util.ui.UIUtil;
+import org.jetbrains.annotations.Nls;
+import org.jetbrains.annotations.NotNull;
+
+import javax.swing.*;
+import javax.swing.border.CompoundBorder;
+import java.awt.*;
+import java.util.ArrayList;
+import java.util.List;
+
+import static com.intellij.openapi.util.Pair.pair;
+
+public final class LegalNoticeDialog extends DialogWrapper {
+  public static final class Builder {
+    private final String title;
+    private final String message;
+    private Project project;
+    private Component parent;
+    private String cancelText;
+    private Pair<String, Integer> customAction;
+
+    private Builder(String title, String message) {
+      this.title = title;
+      this.message = message;
+    }
+
+    public Builder withParent(Project project) {
+      this.project = project;
+      return this;
+    }
+
+    public Builder withParent(Component parent) {
+      this.parent = parent;
+      return this;
+    }
+
+    public Builder withCancelText(@NotNull @Nls String text) {
+      cancelText = text;
+      return this;
+    }
+
+    public Builder withCustomAction(@NotNull @Nls String text, int exitCode) {
+      assert exitCode >= DialogWrapper.NEXT_USER_EXIT_CODE;
+      customAction = pair(text, exitCode);
+      return this;
+    }
+
+    public int show() {
+      LegalNoticeDialog dialog = new LegalNoticeDialog(this);
+      dialog.show();
+      return dialog.getExitCode();
+    }
+  }
+
+  public static Builder build(@NotNull @Nls(capitalization = Nls.Capitalization.Title) String title,
+                              @NotNull @Nls(capitalization = Nls.Capitalization.Sentence) String message) {
+    return new Builder(title, message);
+  }
+
+  private final Builder myBuilder;
+  private JComponent myFocusedComponent;
+
+  private LegalNoticeDialog(Builder builder) {
+    super(builder.project, builder.parent, true, IdeModalityType.PROJECT);
+    myBuilder = builder;
+    setTitle(builder.title);
+    setOKButtonText(CommonBundle.message("button.accept"));
+    setCancelButtonText(builder.cancelText != null ? builder.cancelText : CommonBundle.message("button.decline"));
+    init();
+    pack();
+  }
+
+  @Override
+  protected JComponent createCenterPanel() {
+    JPanel iconPanel = new JPanel(new BorderLayout());
+    iconPanel.add(new JBLabel(AllIcons.General.WarningDialog), BorderLayout.NORTH);
+
+    JEditorPane messageArea = new JEditorPane();
+    messageArea.setEditorKit(UIUtil.getHTMLEditorKit());
+    messageArea.setEditable(false);
+    messageArea.setPreferredSize(JBUI.size(500, 100));
+    messageArea.setBorder(new CompoundBorder(BorderFactory.createLineBorder(Gray._200), JBUI.Borders.empty(3)));
+    messageArea.setText(UIUtil.toHtml(myBuilder.message));
+    myFocusedComponent = messageArea;
+
+    JPanel panel = new JPanel(new BorderLayout(JBUI.scale(3), 0));
+    panel.add(iconPanel, BorderLayout.WEST);
+    panel.add(messageArea, BorderLayout.CENTER);
+    return panel;
+  }
+
+  @NotNull
+  @Override
+  protected Action[] createActions() {
+    List<Action> actions = new ArrayList<>();
+    actions.add(getOKAction());
+    if (myBuilder.customAction != null) {
+      actions.add(new DialogWrapperExitAction(myBuilder.customAction.first, myBuilder.customAction.second));
+    }
+    actions.add(getCancelAction());
+    return actions.toArray(new Action[0]);
+  }
+
+  @Override
+  public JComponent getPreferredFocusedComponent() {
+    return myFocusedComponent;
+  }
+}
\ No newline at end of file
diff --git a/platform/platform-resources-en/src/messages/CommonBundle.properties b/platform/platform-resources-en/src/messages/CommonBundle.properties
index d71ded1d3e7c..bf94ecd0f3ea 100644
--- a/platform/platform-resources-en/src/messages/CommonBundle.properties
+++ b/platform/platform-resources-en/src/messages/CommonBundle.properties
@@ -44,6 +44,8 @@ close.action.name=Close
 button.edit=Edit
 button.remove=Remove
 button.remove.r=&Remove
+button.accept=Accept
+button.decline=Decline
 
 title.settings=Settings
 title.settings.mac=Preferences
diff --git a/plugins/java-decompiler/plugin/src/messages/Decompiler.properties b/plugins/java-decompiler/plugin/src/messages/Decompiler.properties
index 6af5a1347816..9a3d5d22f82e 100644
--- a/plugins/java-decompiler/plugin/src/messages/Decompiler.properties
+++ b/plugins/java-decompiler/plugin/src/messages/Decompiler.properties
@@ -13,9 +13,7 @@ legal.notice.text=\
   <br><br>\
   Using JetBrains Decompiler is entirely optional. Licensor does neither encourage nor condone \
   the use of JetBrains Decompiler, and disclaims any liability for Licensee's use of JetBrains Decompiler \
-  in violation of applicable laws.\
-  <br><br>
-legal.notice.action.accept=Accept
+  in violation of applicable laws.
 legal.notice.action.reject=Decline and restart
 legal.notice.action.postpone=Decide later
 
diff --git a/plugins/java-decompiler/plugin/src/org/jetbrains/java/decompiler/IdeaDecompiler.kt b/plugins/java-decompiler/plugin/src/org/jetbrains/java/decompiler/IdeaDecompiler.kt
index bb8d6f69631c..4a8c430dd47f 100644
--- a/plugins/java-decompiler/plugin/src/org/jetbrains/java/decompiler/IdeaDecompiler.kt
+++ b/plugins/java-decompiler/plugin/src/org/jetbrains/java/decompiler/IdeaDecompiler.kt
@@ -3,7 +3,6 @@ package org.jetbrains.java.decompiler
 
 import com.intellij.application.options.CodeStyle
 import com.intellij.execution.filters.LineNumbersMapping
-import com.intellij.icons.AllIcons
 import com.intellij.ide.highlighter.JavaFileType
 import com.intellij.ide.plugins.PluginManagerCore
 import com.intellij.ide.util.PropertiesComponent
@@ -15,7 +14,6 @@ import com.intellij.openapi.fileEditor.FileEditorManagerListener
 import com.intellij.openapi.fileTypes.StdFileTypes
 import com.intellij.openapi.progress.ProcessCanceledException
 import com.intellij.openapi.progress.ProgressManager
-import com.intellij.openapi.project.Project
 import com.intellij.openapi.ui.DialogWrapper
 import com.intellij.openapi.util.io.FileUtil
 import com.intellij.openapi.util.registry.Registry
@@ -27,27 +25,19 @@ import com.intellij.psi.PsiJavaModule
 import com.intellij.psi.PsiPackage
 import com.intellij.psi.compiled.ClassFileDecompilers
 import com.intellij.psi.impl.compiled.ClsFileImpl
-import com.intellij.ui.Gray
-import com.intellij.ui.components.JBLabel
-import com.intellij.ui.components.JBPanel
+import com.intellij.ui.components.LegalNoticeDialog
 import com.intellij.util.ArrayUtil
 import com.intellij.util.containers.ContainerUtil
-import com.intellij.util.ui.JBUI
-import com.intellij.util.ui.UIUtil
 import org.jetbrains.java.decompiler.main.decompiler.BaseDecompiler
 import org.jetbrains.java.decompiler.main.extern.IBytecodeProvider
 import org.jetbrains.java.decompiler.main.extern.IFernflowerPreferences
 import org.jetbrains.java.decompiler.main.extern.IResultSaver
-import java.awt.BorderLayout
 import java.io.File
 import java.io.IOException
 import java.util.*
 import java.util.concurrent.Callable
 import java.util.concurrent.Future
 import java.util.jar.Manifest
-import javax.swing.BorderFactory
-import javax.swing.JComponent
-import javax.swing.JEditorPane
 
 class IdeaDecompiler : ClassFileDecompilers.Light() {
   companion object {
@@ -55,6 +45,9 @@ class IdeaDecompiler : ClassFileDecompilers.Light() {
 
     private const val LEGAL_NOTICE_KEY = "decompiler.legal.notice.accepted"
 
+    private const val POSTPONE_EXIT_CODE = DialogWrapper.CANCEL_EXIT_CODE
+    private const val DECLINE_EXIT_CODE = DialogWrapper.NEXT_USER_EXIT_CODE
+
     private fun getOptions(): Map<String, Any> {
       val options = CodeStyle.getDefaultSettings().getIndentOptions(JavaFileType.INSTANCE)
       val indent = StringUtil.repeat(" ", options.INDENT_SIZE)
@@ -92,9 +85,13 @@ class IdeaDecompiler : ClassFileDecompilers.Light() {
         if (!myLegalNoticeAccepted && file.fileType === StdFileTypes.CLASS && ClassFileDecompilers.find(file) === this@IdeaDecompiler) {
           myFutures[file] = app.executeOnPooledThread(Callable<CharSequence> { decompile(file) })
 
-          val dialog = LegalNoticeDialog(source.project, file)
-          dialog.show()
-          when (dialog.exitCode) {
+          val title = IdeaDecompilerBundle.message("legal.notice.title", StringUtil.last(file.path, 40, true))
+          val message = IdeaDecompilerBundle.message("legal.notice.text")
+          val result = LegalNoticeDialog.build(title, message)
+            .withCancelText(IdeaDecompilerBundle.message("legal.notice.action.postpone"))
+            .withCustomAction(IdeaDecompilerBundle.message("legal.notice.action.reject"), DECLINE_EXIT_CODE)
+            .show()
+          when (result) {
             DialogWrapper.OK_EXIT_CODE -> {
               PropertiesComponent.getInstance().setValue(LEGAL_NOTICE_KEY, true)
               myLegalNoticeAccepted = true
@@ -107,13 +104,13 @@ class IdeaDecompiler : ClassFileDecompilers.Light() {
               connection.disconnect()
             }
 
-            LegalNoticeDialog.DECLINE_EXIT_CODE -> {
+            DECLINE_EXIT_CODE -> {
               myFutures.remove(file)?.cancel(true)
               PluginManagerCore.disablePlugin("org.jetbrains.java.decompiler")
               ApplicationManagerEx.getApplicationEx().restart(true)
             }
 
-            LegalNoticeDialog.POSTPONE_EXIT_CODE -> {
+            POSTPONE_EXIT_CODE -> {
               myFutures.remove(file)?.cancel(true)
             }
           }
@@ -236,44 +233,4 @@ class IdeaDecompiler : ClassFileDecompilers.Light() {
       return -1
     }
   }
-
-  private class LegalNoticeDialog(project: Project, file: VirtualFile) : DialogWrapper(project) {
-    companion object {
-      const val POSTPONE_EXIT_CODE = DialogWrapper.CANCEL_EXIT_CODE
-      const val DECLINE_EXIT_CODE = DialogWrapper.NEXT_USER_EXIT_CODE
-    }
-
-    private var myMessage: JEditorPane? = null
-
-    init {
-      title = IdeaDecompilerBundle.message("legal.notice.title", StringUtil.last(file.path, 40, true))
-      setOKButtonText(IdeaDecompilerBundle.message("legal.notice.action.accept"))
-      setCancelButtonText(IdeaDecompilerBundle.message("legal.notice.action.postpone"))
-      init()
-      pack()
-    }
-
-    override fun createCenterPanel(): JComponent? {
-      val iconPanel = JBPanel<JBPanel<*>>(BorderLayout())
-      iconPanel.add(JBLabel(AllIcons.General.WarningDialog), BorderLayout.NORTH)
-
-      val message = JEditorPane()
-      myMessage = message
-      message.editorKit = UIUtil.getHTMLEditorKit()
-      message.isEditable = false
-      message.preferredSize = JBUI.size(500, 100)
-      message.border = BorderFactory.createLineBorder(Gray._200)
-      message.text = "<div style='margin:5px;'>${IdeaDecompilerBundle.message("legal.notice.text")}</div>"
-
-      val panel = JBPanel<JBPanel<*>>(BorderLayout(JBUI.scale(10), 0))
-      panel.add(iconPanel, BorderLayout.WEST)
-      panel.add(message, BorderLayout.CENTER)
-      return panel
-    }
-
-    override fun createActions() =
-      arrayOf(okAction, DialogWrapperExitAction(IdeaDecompilerBundle.message("legal.notice.action.reject"), DECLINE_EXIT_CODE), cancelAction)
-
-    override fun getPreferredFocusedComponent() = myMessage
-  }
 }
\ No newline at end of file