--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/jdk.editpad/share/classes/jdk/editpad/EditPad.java	Wed Nov 02 16:24:43 2016 -0700
@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.editpad;
+
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+import java.awt.Font;
+import java.awt.event.ActionListener;
+import java.awt.event.KeyEvent;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import java.util.MissingResourceException;
+import java.util.ResourceBundle;
+import java.util.function.Consumer;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.JTextArea;
+
+/**
+ * A minimal Swing editor as a fallback when the user does not specify an
+ * external editor.
+ */
+class EditPad implements Runnable {
+
+    private static final String L10N_RB_NAME  = "jdk.editpad.resources.l10n";
+    private ResourceBundle rb  = null;
+    private final String windowLabel;
+    private final Consumer<String> errorHandler;
+    private final String initialText;
+    private final Runnable closeMark;
+    private final Consumer<String> saveHandler;
+
+    /**
+     * Create an Edit Pad minimal editor.
+     *
+     * @param windowLabel the label string for the Edit Pad window
+     * @param errorHandler a handler for unexpected errors
+     * @param initialText the source to load in the Edit Pad
+     * @param closeMark a Runnable that is run when Edit Pad closes
+     * @param saveHandler a handler for changed source (sent the full source)
+     */
+    EditPad(String windowLabel, Consumer<String> errorHandler, String initialText,
+            Runnable closeMark, Consumer<String> saveHandler) {
+        this.windowLabel = windowLabel;
+        this.errorHandler = errorHandler;
+        this.initialText = initialText;
+        this.closeMark = closeMark;
+        this.saveHandler = saveHandler;
+    }
+
+    @Override
+    public void run() {
+        JFrame jframe = new JFrame(windowLabel == null
+                ? getResourceString("editpad.name")
+                : windowLabel);
+        Runnable closer = () -> {
+            jframe.setVisible(false);
+            jframe.dispose();
+            closeMark.run();
+        };
+        jframe.addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowClosing(WindowEvent e) {
+                closer.run();
+            }
+        });
+        jframe.setLocationRelativeTo(null);
+        jframe.setLayout(new BorderLayout());
+        JTextArea textArea = new JTextArea(initialText);
+        textArea.setFont(new Font("monospaced", Font.PLAIN, 13));
+        jframe.add(new JScrollPane(textArea), BorderLayout.CENTER);
+        jframe.add(buttons(closer, textArea), BorderLayout.SOUTH);
+
+        jframe.setSize(800, 600);
+        jframe.setVisible(true);
+    }
+
+    private JPanel buttons(Runnable closer, JTextArea textArea) {
+        FlowLayout flow = new FlowLayout();
+        flow.setHgap(35);
+        JPanel buttons = new JPanel(flow);
+        addButton(buttons, "editpad.cancel", KeyEvent.VK_C, e -> {
+            closer.run();
+        });
+        addButton(buttons, "editpad.accept", KeyEvent.VK_A, e -> {
+            saveHandler.accept(textArea.getText());
+        });
+        addButton(buttons, "editpad.exit",   KeyEvent.VK_X, e -> {
+            saveHandler.accept(textArea.getText());
+            closer.run();
+        });
+        return buttons;
+    }
+
+    private void addButton(JPanel buttons, String rkey, int mnemonic, ActionListener action) {
+        JButton but = new JButton(getResourceString(rkey));
+        but.setMnemonic(mnemonic);
+        buttons.add(but);
+        but.addActionListener(action);
+    }
+
+    private String getResourceString(String key) {
+        if (rb == null) {
+            try {
+                rb = ResourceBundle.getBundle(L10N_RB_NAME);
+            } catch (MissingResourceException mre) {
+                error("Cannot find ResourceBundle: %s", L10N_RB_NAME);
+                return "";
+            }
+        }
+        String s;
+        try {
+            s = rb.getString(key);
+        } catch (MissingResourceException mre) {
+            error("Missing resource: %s in %s", key, L10N_RB_NAME);
+            return "";
+        }
+        return s;
+    }
+
+    private void error(String fmt, Object... args) {
+        errorHandler.accept(String.format(fmt, args));
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/jdk.editpad/share/classes/jdk/editpad/EditPadProvider.java	Wed Nov 02 16:24:43 2016 -0700
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.editpad;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.function.Consumer;
+import javax.swing.SwingUtilities;
+import jdk.internal.editor.spi.BuildInEditorProvider;
+
+/**
+ * Defines the provider of an Edit Pad implementation.
+ *
+ * @author Robert Field
+ */
+public class EditPadProvider implements BuildInEditorProvider {
+
+    /**
+     * @return the rank of a provider, greater is better.
+     */
+    @Override
+    public int rank() {
+        return 5;
+    }
+
+    /**
+     * Create an Edit Pad minimal editor.
+     *
+     * @param windowLabel the label string for the Edit Pad window, or null,
+     * for default window label
+     * @param initialText the source to load in the Edit Pad
+     * @param saveHandler a handler for changed source (can be sent the full source)
+     * @param errorHandler a handler for unexpected errors
+     */
+    @Override
+    public void edit(String windowLabel, String initialText,
+            Consumer<String> saveHandler, Consumer<String> errorHandler) {
+        CountDownLatch closeLock = new CountDownLatch(1);
+        SwingUtilities.invokeLater(
+                new EditPad(windowLabel, errorHandler, initialText, closeLock::countDown, saveHandler));
+        do {
+            try {
+                closeLock.await();
+                break;
+            } catch (InterruptedException ex) {
+                // ignore and loop
+            }
+        } while (true);
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/jdk.editpad/share/classes/jdk/editpad/resources/l10n.properties	Wed Nov 02 16:24:43 2016 -0700
@@ -0,0 +1,29 @@
+#
+# Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.  Oracle designates this
+# particular file as subject to the "Classpath" exception as provided
+# by Oracle in the LICENSE file that accompanied this code.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+editpad.name = Edit Pad
+editpad.cancel = Cancel
+editpad.accept = Accept
+editpad.exit = Exit

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/jdk.editpad/share/classes/module-info.java	Wed Nov 02 16:24:43 2016 -0700
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * Implementation of the edit pad service.
+ */
+module jdk.editpad {
+    requires jdk.internal.ed;
+    requires java.desktop;
+    provides jdk.internal.editor.spi.BuildInEditorProvider
+              with jdk.editpad.EditPadProvider;
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/jdk.internal.ed/share/classes/jdk/internal/editor/external/ExternalEditor.java	Wed Nov 02 16:24:43 2016 -0700
@@ -0,0 +1,192 @@
+/*
+ * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.editor.external;
+
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.nio.file.ClosedWatchServiceException;
+import java.nio.file.FileSystems;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.WatchKey;
+import java.nio.file.WatchService;
+import java.util.Arrays;
+import java.util.Scanner;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import static java.nio.file.StandardWatchEventKinds.ENTRY_CREATE;
+import static java.nio.file.StandardWatchEventKinds.ENTRY_DELETE;
+import static java.nio.file.StandardWatchEventKinds.ENTRY_MODIFY;
+
+/**
+ * Wrapper for controlling an external editor.
+ */
+public class ExternalEditor {
+    private final Consumer<String> errorHandler;
+    private final Consumer<String> saveHandler;
+    private final boolean wait;
+
+    private final Runnable suspendInteractiveInput;
+    private final Runnable resumeInteractiveInput;
+    private final Runnable promptForNewLineToEndWait;
+
+    private WatchService watcher;
+    private Thread watchedThread;
+    private Path dir;
+    private Path tmpfile;
+
+    /**
+     * Launch an external editor.
+     *
+     * @param cmd the command to launch (with parameters)
+     * @param initialText initial text in the editor buffer
+     * @param errorHandler handler for error messages
+     * @param saveHandler handler sent the buffer contents on save
+     * @param suspendInteractiveInput a callback to suspend caller (shell) input
+     * @param resumeInteractiveInput a callback to resume caller input
+     * @param wait true, if editor process termination cannot be used to
+     * determine when done
+     * @param promptForNewLineToEndWait a callback to prompt for newline if
+     * wait==true
+     */
+    public static void edit(String[] cmd, String initialText,
+            Consumer<String> errorHandler,
+            Consumer<String> saveHandler,
+            Runnable suspendInteractiveInput,
+            Runnable resumeInteractiveInput,
+            boolean wait,
+            Runnable promptForNewLineToEndWait) {
+        ExternalEditor ed = new ExternalEditor(errorHandler, saveHandler, suspendInteractiveInput,
+             resumeInteractiveInput, wait, promptForNewLineToEndWait);
+        ed.edit(cmd, initialText);
+    }
+
+    ExternalEditor(Consumer<String> errorHandler,
+            Consumer<String> saveHandler,
+            Runnable suspendInteractiveInput,
+            Runnable resumeInteractiveInput,
+            boolean wait,
+            Runnable promptForNewLineToEndWait) {
+        this.errorHandler = errorHandler;
+        this.saveHandler = saveHandler;
+        this.wait = wait;
+        this.suspendInteractiveInput = suspendInteractiveInput;
+        this.resumeInteractiveInput = resumeInteractiveInput;
+        this.promptForNewLineToEndWait = promptForNewLineToEndWait;
+    }
+
+    private void edit(String[] cmd, String initialText) {
+        try {
+            setupWatch(initialText);
+            launch(cmd);
+        } catch (IOException ex) {
+            errorHandler.accept(ex.getMessage());
+        }
+    }
+
+    /**
+     * Creates a WatchService and registers the given directory
+     */
+    private void setupWatch(String initialText) throws IOException {
+        this.watcher = FileSystems.getDefault().newWatchService();
+        this.dir = Files.createTempDirectory("extedit");
+        this.tmpfile = Files.createTempFile(dir, null, ".java");
+        Files.write(tmpfile, initialText.getBytes(Charset.forName("UTF-8")));
+        dir.register(watcher,
+                ENTRY_CREATE,
+                ENTRY_DELETE,
+                ENTRY_MODIFY);
+        watchedThread = new Thread(() -> {
+            for (;;) {
+                WatchKey key;
+                try {
+                    key = watcher.take();
+                } catch (ClosedWatchServiceException ex) {
+                    // The watch service has been closed, we are done
+                    break;
+                } catch (InterruptedException ex) {
+                    // tolerate an interrupt
+                    continue;
+                }
+
+                if (!key.pollEvents().isEmpty()) {
+                    saveFile();
+                }
+
+                boolean valid = key.reset();
+                if (!valid) {
+                    // The watch service has been closed, we are done
+                    break;
+                }
+            }
+        });
+        watchedThread.start();
+    }
+
+    private void launch(String[] cmd) throws IOException {
+        String[] params = Arrays.copyOf(cmd, cmd.length + 1);
+        params[cmd.length] = tmpfile.toString();
+        ProcessBuilder pb = new ProcessBuilder(params);
+        pb = pb.inheritIO();
+
+        try {
+            suspendInteractiveInput.run();
+            Process process = pb.start();
+            // wait to exit edit mode in one of these ways...
+            if (wait) {
+                // -wait option -- ignore process exit, wait for carriage-return
+                Scanner scanner = new Scanner(System.in);
+                promptForNewLineToEndWait.run();
+                scanner.nextLine();
+            } else {
+                // wait for process to exit
+                process.waitFor();
+            }
+        } catch (IOException ex) {
+            errorHandler.accept("process IO failure: " + ex.getMessage());
+        } catch (InterruptedException ex) {
+            errorHandler.accept("process interrupt: " + ex.getMessage());
+        } finally {
+            try {
+                watcher.close();
+                watchedThread.join(); //so that saveFile() is finished.
+                saveFile();
+            } catch (InterruptedException ex) {
+                errorHandler.accept("process interrupt: " + ex.getMessage());
+            } finally {
+                resumeInteractiveInput.run();
+            }
+        }
+    }
+
+    private void saveFile() {
+        try {
+            saveHandler.accept(Files.lines(tmpfile).collect(Collectors.joining("\n", "", "\n")));
+        } catch (IOException ex) {
+            errorHandler.accept("Failure in read edit file: " + ex.getMessage());
+        }
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/jdk.internal.ed/share/classes/jdk/internal/editor/spi/BuildInEditorProvider.java	Wed Nov 02 16:24:43 2016 -0700
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.editor.spi;
+
+import java.util.function.Consumer;
+
+/**
+ * Defines the provider of a built-in editor.
+ */
+public interface BuildInEditorProvider {
+
+    /**
+     * @return the rank of a provider, greater is better.
+     */
+    int rank();
+
+    /**
+     * Create a simple built-in editor.
+     *
+     * @param windowLabel the label string for the Edit Pad window, or null,
+     * for default window label
+     * @param initialText the source to load in the Edit Pad
+     * @param saveHandler a handler for changed source (can be sent the full source)
+     * @param errorHandler a handler for unexpected errors
+     */
+    void edit(String windowLabel, String initialText,
+            Consumer<String> saveHandler, Consumer<String> errorHandler);
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/jdk.internal.ed/share/classes/module-info.java	Wed Nov 02 16:24:43 2016 -0700
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * Internal editor support for JDK tools.  Includes the Service Provider
+ * Interface to built-in editors.
+ */
+module jdk.internal.ed {
+
+    exports jdk.internal.editor.spi to jdk.editpad, jdk.jshell, jdk.scripting.nashorn.shell;
+    exports jdk.internal.editor.external to jdk.jshell, jdk.scripting.nashorn.shell;
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/jdk/editpad/EditPadTest.java	Wed Nov 02 16:24:43 2016 -0700
@@ -0,0 +1,342 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8167636 8167639 8168972
+ * @summary Testing built-in editor.
+ * @modules java.desktop/java.awt
+ *          jdk.internal.ed/jdk.internal.editor.spi
+ *          jdk.editpad/jdk.editpad
+ * @run testng EditPadTest
+ */
+
+import java.awt.AWTException;
+import java.awt.Component;
+import java.awt.Container;
+import java.awt.Dimension;
+import java.awt.Frame;
+import java.awt.GraphicsEnvironment;
+import java.awt.Point;
+import java.awt.Robot;
+import java.awt.event.InputEvent;
+import java.awt.event.WindowEvent;
+import java.lang.reflect.InvocationTargetException;
+import java.util.ServiceLoader;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.function.Consumer;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.JTextArea;
+import javax.swing.JViewport;
+import javax.swing.SwingUtilities;
+
+import org.testng.annotations.AfterClass;
+import org.testng.annotations.BeforeClass;
+import org.testng.annotations.Test;
+import jdk.internal.editor.spi.BuildInEditorProvider;
+import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.assertTrue;
+
+@Test
+public class EditPadTest {
+
+    private static final int DELAY = 500;
+    private static final String WINDOW_LABEL = "Test Edit Pad";
+
+    private static ExecutorService executor;
+    private static Robot robot;
+    private static JFrame frame = null;
+    private static JTextArea area = null;
+    private static JButton cancel = null;
+    private static JButton accept = null;
+    private static JButton exit = null;
+
+    @BeforeClass
+    public static void setUpEditorPadTest() {
+        if (!GraphicsEnvironment.isHeadless()) {
+            try {
+                robot = new Robot();
+                robot.setAutoWaitForIdle(true);
+                robot.setAutoDelay(DELAY);
+            } catch (AWTException e) {
+                throw new ExceptionInInitializerError(e);
+            }
+        }
+    }
+
+    @AfterClass
+    public static void shutdown() {
+        executorShutdown();
+    }
+
+    public void testSimple() {
+        testEdit("abcdef", 1, "xyz",
+                () -> assertSource("abcdef"),
+                () -> writeSource("xyz"),
+                () -> accept(),
+                () -> assertSource("xyz"),
+                () -> shutdownEditor());
+    }
+
+    public void testCancel() {
+        testEdit("abcdef", 0, "abcdef",
+                () -> assertSource("abcdef"),
+                () -> writeSource("xyz"),
+                () -> cancel());
+    }
+
+    public void testAbort() {
+        testEdit("abcdef", 0, "abcdef",
+                () -> assertSource("abcdef"),
+                () -> writeSource("xyz"),
+                () -> shutdownEditor());
+    }
+
+    public void testAcceptCancel() {
+        testEdit("abcdef", 1, "xyz",
+                () -> assertSource("abcdef"),
+                () -> writeSource("xyz"),
+                () -> accept(),
+                () -> assertSource("xyz"),
+                () -> writeSource("!!!!!!!!!"),
+                () -> cancel());
+    }
+
+    public void testAcceptEdit() {
+        testEdit("abcdef", 2, "xyz",
+                () -> assertSource("abcdef"),
+                () -> writeSource("NoNo"),
+                () -> accept(),
+                () -> assertSource("NoNo"),
+                () -> writeSource("xyz"),
+                () -> exit());
+    }
+
+    private void testEdit(String initialText,
+            int savedCount, String savedText, Runnable... actions) {
+        class Handler {
+
+            String text = null;
+            int count = 0;
+
+            void handle(String s) {
+                ++count;
+                text = s;
+            }
+        }
+        Handler save = new Handler();
+        Handler error = new Handler();
+
+        if (GraphicsEnvironment.isHeadless()) {
+            // Do not actually run if we are headless
+            return;
+        }
+        Future<?> task = doActions(actions);
+        builtInEdit(initialText, save::handle, error::handle);
+        complete(task);
+        assertEquals(error.count, 0, "Error: " + error.text);
+        assertTrue(save.count != savedCount
+                || save.text == null
+                    ? savedText != null
+                    : savedText.equals(save.text),
+                "Expected " + savedCount + " saves, got " + save.count
+                + ", expected \"" + savedText + "\" got \"" + save.text + "\"");
+    }
+
+    private static ExecutorService getExecutor() {
+        if (executor == null) {
+            executor = Executors.newSingleThreadExecutor();
+        }
+        return executor;
+    }
+
+    private static void executorShutdown() {
+        if (executor != null) {
+            executor.shutdown();
+            executor = null;
+        }
+    }
+
+    private void builtInEdit(String initialText,
+            Consumer<String> saveHandler, Consumer<String> errorHandler) {
+        ServiceLoader<BuildInEditorProvider> sl
+                = ServiceLoader.load(BuildInEditorProvider.class);
+        // Find the highest ranking provider
+        BuildInEditorProvider provider = null;
+        for (BuildInEditorProvider p : sl) {
+            if (provider == null || p.rank() > provider.rank()) {
+                provider = p;
+            }
+        }
+        if (provider != null) {
+            provider.edit(WINDOW_LABEL,
+                    initialText, saveHandler, errorHandler);
+        } else {
+            throw new InternalError("Cannot find provider");
+        }
+    }
+
+    private Future<?> doActions(Runnable... actions) {
+        return getExecutor().submit(() -> {
+            try {
+                waitForIdle();
+                SwingUtilities.invokeLater(this::seekElements);
+                waitForIdle();
+                for (Runnable act : actions) {
+                    act.run();
+                }
+            } catch (Throwable e) {
+                shutdownEditor();
+                if (e instanceof AssertionError) {
+                    throw (AssertionError) e;
+                }
+                throw new RuntimeException(e);
+            }
+        });
+    }
+
+    private void complete(Future<?> task) {
+        try {
+            task.get();
+            waitForIdle();
+        } catch (ExecutionException e) {
+            if (e.getCause() instanceof AssertionError) {
+                throw (AssertionError) e.getCause();
+            }
+            throw new RuntimeException(e);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        } finally {
+            shutdownEditor();
+        }
+    }
+
+    private void writeSource(String s) {
+        SwingUtilities.invokeLater(() -> area.setText(s));
+    }
+
+    private void assertSource(String expected) {
+        String[] s = new String[1];
+        try {
+            SwingUtilities.invokeAndWait(() -> s[0] = area.getText());
+        } catch (InvocationTargetException | InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+        assertEquals(s[0], expected);
+    }
+
+    private void accept() {
+        clickOn(accept);
+    }
+
+    private void exit() {
+        clickOn(exit);
+    }
+
+    private void cancel() {
+        clickOn(cancel);
+    }
+
+    private void shutdownEditor() {
+        SwingUtilities.invokeLater(this::clearElements);
+        waitForIdle();
+    }
+
+    private void waitForIdle() {
+        robot.waitForIdle();
+        robot.delay(DELAY);
+    }
+
+    private void seekElements() {
+        for (Frame f : Frame.getFrames()) {
+            if (f.getTitle().equals(WINDOW_LABEL)) {
+                frame = (JFrame) f;
+                // workaround
+                frame.setLocation(0, 0);
+                Container root = frame.getContentPane();
+                for (Component c : root.getComponents()) {
+                    if (c instanceof JScrollPane) {
+                        JScrollPane scrollPane = (JScrollPane) c;
+                        for (Component comp : scrollPane.getComponents()) {
+                            if (comp instanceof JViewport) {
+                                JViewport view = (JViewport) comp;
+                                area = (JTextArea) view.getComponent(0);
+                            }
+                        }
+                    }
+                    if (c instanceof JPanel) {
+                        JPanel p = (JPanel) c;
+                        for (Component comp : p.getComponents()) {
+                            if (comp instanceof JButton) {
+                                JButton b = (JButton) comp;
+                                switch (b.getText()) {
+                                    case "Cancel":
+                                        cancel = b;
+                                        break;
+                                    case "Exit":
+                                        exit = b;
+                                        break;
+                                    case "Accept":
+                                        accept = b;
+                                        break;
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private void clearElements() {
+        if (frame != null) {
+            frame.dispatchEvent(new WindowEvent(frame, WindowEvent.WINDOW_CLOSING));
+            frame = null;
+        }
+        area = null;
+        accept = null;
+        cancel = null;
+        exit = null;
+    }
+
+    private void clickOn(JButton button) {
+        waitForIdle();
+        waitForIdle();
+        waitForIdle();
+        waitForIdle();
+        waitForIdle();
+        waitForIdle();
+        Point p = button.getLocationOnScreen();
+        Dimension d = button.getSize();
+        robot.mouseMove(p.x + d.width / 2, p.y + d.height / 2);
+        robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
+        robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
+    }
+}