--- /dev/null	2019-11-20 11:11:38.000000000 -0500
+++ new/test/jdk/tools/jpackage/helpers/jdk/jpackage/test/Functional.java	2019-11-20 11:11:35.713991100 -0500
@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2019, 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.
+ */
+package jdk.jpackage.test;
+
+import java.lang.reflect.InvocationTargetException;
+import java.util.function.Consumer;
+import java.util.function.Function;
+import java.util.function.Predicate;
+import java.util.function.Supplier;
+
+
+public class Functional {
+    @FunctionalInterface
+    public interface ThrowingConsumer<T> {
+        void accept(T t) throws Throwable;
+
+        public static <T> Consumer<T> toConsumer(ThrowingConsumer<T> v) {
+            return o -> {
+                try {
+                    v.accept(o);
+                } catch (Throwable ex) {
+                    rethrowUnchecked(ex);
+                }
+            };
+        }
+    }
+
+    @FunctionalInterface
+    public interface ThrowingSupplier<T> {
+        T get() throws Throwable;
+
+        public static <T> Supplier<T> toSupplier(ThrowingSupplier<T> v) {
+            return () -> {
+                try {
+                    return v.get();
+                } catch (Throwable ex) {
+                    rethrowUnchecked(ex);
+                }
+                // Unreachable
+                return null;
+            };
+        }
+    }
+
+    @FunctionalInterface
+    public interface ThrowingFunction<T, R> {
+        R apply(T t) throws Throwable;
+
+        public static <T, R> Function<T, R> toFunction(ThrowingFunction<T, R> v) {
+            return (t) -> {
+                try {
+                    return v.apply(t);
+                } catch (Throwable ex) {
+                    rethrowUnchecked(ex);
+                }
+                // Unreachable
+                return null;
+            };
+        }
+    }
+
+    @FunctionalInterface
+    public interface ThrowingRunnable {
+        void run() throws Throwable;
+
+        public static Runnable toRunnable(ThrowingRunnable v) {
+            return () -> {
+                try {
+                    v.run();
+                } catch (Throwable ex) {
+                    rethrowUnchecked(ex);
+                }
+            };
+        }
+    }
+
+    public static <T> Supplier<T> identity(Supplier<T> v) {
+        return v;
+    }
+
+    public static <T> Consumer<T> identity(Consumer<T> v) {
+        return v;
+    }
+
+    public static Runnable identity(Runnable v) {
+        return v;
+    }
+
+    public static <T, R> Function<T, R> identity(Function<T, R> v) {
+        return v;
+    }
+
+    public static <T, R> Function<T, R> identityFunction(Function<T, R> v) {
+        return v;
+    }
+
+    public static <T> Predicate<T> identity(Predicate<T> v) {
+        return v;
+    }
+
+    public static <T> Predicate<T> identityPredicate(Predicate<T> v) {
+        return v;
+    }
+
+    public static class ExceptionBox extends RuntimeException {
+        public ExceptionBox(Throwable throwable) {
+            super(throwable);
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public static void rethrowUnchecked(Throwable throwable) throws ExceptionBox {
+        if (throwable instanceof ExceptionBox) {
+            throw (ExceptionBox)throwable;
+        }
+
+        if (throwable instanceof InvocationTargetException) {
+            new ExceptionBox(throwable.getCause());
+        }
+
+        throw new ExceptionBox(throwable);
+    }
+}