diff --git a/README.md b/README.md
index bbd8726b42..0e47a6df46 100644
--- a/README.md
+++ b/README.md
@@ -203,8 +203,9 @@ to Gradle (in Preferences -> Build, Execution, Deployment -> Build Tools -> Grad
 
 ### Requirements
 
-* JDK >= 1.8 referred to by the `JAVA_HOME` environment variable. JDK must include JavaFX.
+* JDK >= 11 referred to by the `JAVA_HOME` environment variable.
 * JDK 1.6 referred to by the `JDK_16` environment variable. It is okay to have `JDK_16` pointing to `JAVA_HOME` for external contributions.
+* JDK 1.8 referred to by the `JDK_18` environment variable. Only used by nightly stress-tests. It is okay to have `JDK_16` pointing to `JAVA_HOME` for external contributions.
 
 ## Contributions and releases
 
diff --git a/build.gradle b/build.gradle
index e03179dddb..85d60cca51 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ * Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
  */
 import org.jetbrains.kotlin.konan.target.HostManager
 
@@ -68,6 +68,7 @@ buildscript {
         classpath "org.jetbrains.dokka:dokka-gradle-plugin:$dokka_version"
         classpath "org.jetbrains.kotlinx:atomicfu-gradle-plugin:$atomicfu_version"
         classpath "com.moowork.gradle:gradle-node-plugin:$gradle_node_version"
+        classpath "org.openjfx:javafx-plugin:$javafx_plugin_version"
         classpath "org.jetbrains.kotlinx:binary-compatibility-validator:$binary_compatibility_validator_version"
 
         // JMH plugins
@@ -261,8 +262,26 @@ configure(subprojects.findAll { !unpublished.contains(it.name) }) {
 // Report Kotlin compiler version when building project
 println("Using Kotlin compiler version: $org.jetbrains.kotlin.config.KotlinCompilerVersion.VERSION")
 
+// --------------- Publish only from under JDK11+ ---------------
+task checkJdkForPublish {
+    doFirst {
+        String javaVersion = System.properties["java.version"]
+        int i = javaVersion.indexOf('.')
+        int javaVersionMajor =  (i < 0 ? javaVersion : javaVersion.substring(0, i)).toInteger()
+        if (javaVersionMajor < 11) {
+            throw new GradleException("Project can be build for publishing only under JDK 11+, but found ${javaVersion}")
+        }
+    }
+}
+
 // --------------- Configure sub-projects that are published ---------------
-task deploy(dependsOn: getTasksByName("publish", true) + getTasksByName("publishNpm", true))
+def publishTasks = getTasksByName("publish", true) + getTasksByName("publishNpm", true)
+
+publishTasks.each {
+    it.dependsOn checkJdkForPublish
+}
+
+task deploy(dependsOn: publishTasks)
 
 apply plugin: 'base'
 
diff --git a/gradle.properties b/gradle.properties
index b693ededcd..bb3e946b8e 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,5 +1,5 @@
 #
-# Copyright 2016-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+# Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
 #
 
 # Kotlin
@@ -17,8 +17,16 @@ byte_buddy_version=1.9.3
 reactor_vesion=3.2.5.RELEASE
 reactive_streams_version=1.0.2
 rxjava2_version=2.2.8
+javafx_version=11.0.2
+javafx_plugin_version=0.0.8
 binary_compatibility_validator_version=0.1.1
 
+# Android versions
+android_version=4.1.1.4
+android_support_version=26.1.0
+robolectric_version=4.0.2
+baksmali_version=2.2.7
+
 # JS
 gradle_node_version=1.2.0
 node_version=8.9.3
diff --git a/kotlinx-coroutines-debug/test/RunningThreadStackMergeTest.kt b/kotlinx-coroutines-debug/test/RunningThreadStackMergeTest.kt
index 3f3c69cdb2..c0b7f50134 100644
--- a/kotlinx-coroutines-debug/test/RunningThreadStackMergeTest.kt
+++ b/kotlinx-coroutines-debug/test/RunningThreadStackMergeTest.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ * Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
  */
 package kotlinx.coroutines.debug
 
@@ -20,7 +20,7 @@ class RunningThreadStackMergeTest : DebugTestBase() {
         verifyDump(
             "Coroutine \"coroutine#1\":BlockingCoroutine{Active}@62230679", // <- this one is ignored
             "Coroutine \"coroutine#2\":StandaloneCoroutine{Active}@50284dc4, state: RUNNING\n" +
-                    "\tat sun.misc.Unsafe.park(Native Method)\n" +
+                    "\tat jdk.internal.misc.Unsafe.park(Native Method)\n" +
                     "\tat java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)\n" +
                     "\tat java.util.concurrent.locks.AbstractQueuedSynchronizer\$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)\n" +
                     "\tat java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:234)\n" +
@@ -75,7 +75,7 @@ class RunningThreadStackMergeTest : DebugTestBase() {
         verifyDump(
             "Coroutine \"coroutine#1\":BlockingCoroutine{Active}@62230679", // <- this one is ignored
             "Coroutine \"coroutine#2\":StandaloneCoroutine{Active}@3aea3c67, state: RUNNING\n" +
-                    "\tat sun.misc.Unsafe.park(Native Method)\n" +
+                    "\tat jdk.internal.misc.Unsafe.park(Native Method)\n" +
                     "\tat java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)\n" +
                     "\tat java.util.concurrent.locks.AbstractQueuedSynchronizer\$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)\n" +
                     "\tat java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:234)\n" +
@@ -116,7 +116,7 @@ class RunningThreadStackMergeTest : DebugTestBase() {
         verifyDump(
             "Coroutine \"coroutine#1\":BlockingCoroutine{Active}@62230679", // <- this one is ignored
             "Coroutine \"coroutine#2\":StandaloneCoroutine{Active}@3aea3c67, state: RUNNING\n" +
-                    "\tat sun.misc.Unsafe.park(Native Method)\n" +
+                    "\tat jdk.internal.misc.Unsafe.park(Native Method)\n" +
                     "\tat java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)\n" +
                     "\tat java.util.concurrent.locks.AbstractQueuedSynchronizer\$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)\n" +
                     "\tat java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:234)\n" +
diff --git a/kotlinx-coroutines-debug/test/StracktraceUtils.kt b/kotlinx-coroutines-debug/test/StracktraceUtils.kt
index 2600e4a572..de31ac10a4 100644
--- a/kotlinx-coroutines-debug/test/StracktraceUtils.kt
+++ b/kotlinx-coroutines-debug/test/StracktraceUtils.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ * Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
  */
 
 package kotlinx.coroutines.debug
@@ -11,6 +11,9 @@ public fun String.trimStackTrace(): String =
     trimIndent()
         .replace(Regex(":[0-9]+"), "")
         .replace(Regex("#[0-9]+"), "")
+        .replace(Regex("(?<=\tat )[^\n]*/"), "")
+        .replace(Regex("\t"), "")
+        .replace("sun.misc.Unsafe.park", "jdk.internal.misc.Unsafe.park") // JDK8->JDK11
         .applyBackspace()
 
 public fun String.applyBackspace(): String {
@@ -30,16 +33,12 @@ public fun String.applyBackspace(): String {
 
 public fun verifyStackTrace(e: Throwable, traces: List<String>) {
     val stacktrace = toStackTrace(e)
+    val trimmedStackTrace = stacktrace.trimStackTrace()
     traces.forEach {
-        val expectedLines = it.trimStackTrace().split("\n")
-        for (i in 0 until expectedLines.size) {
-            traces.forEach {
-                assertTrue(
-                    stacktrace.trimStackTrace().contains(it.trimStackTrace()),
-                    "\nExpected trace element:\n$it\n\nActual stacktrace:\n$stacktrace"
-                )
-            }
-        }
+        assertTrue(
+            trimmedStackTrace.contains(it.trimStackTrace()),
+            "\nExpected trace element:\n$it\n\nActual stacktrace:\n$stacktrace"
+        )
     }
 
     val causes = stacktrace.count("Caused by")
diff --git a/ui/kotlinx-coroutines-android/android-unit-tests/build.gradle b/ui/kotlinx-coroutines-android/android-unit-tests/build.gradle
index 83b8dcd7d9..d724cd90d1 100644
--- a/ui/kotlinx-coroutines-android/android-unit-tests/build.gradle
+++ b/ui/kotlinx-coroutines-android/android-unit-tests/build.gradle
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ * Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
  */
 
 repositories {
@@ -7,10 +7,9 @@ repositories {
 }
 
 dependencies {
-    testImplementation 'com.google.android:android:4.1.1.4'
-    testImplementation 'com.android.support:support-annotations:26.1.0'
-    testImplementation 'com.google.android:android:4.1.1.4'
-    testImplementation 'org.robolectric:robolectric:4.0-alpha-3'
+    testImplementation "com.google.android:android:$android_version"
+    testImplementation "com.android.support:support-annotations:$android_support_version"
+    testImplementation "org.robolectric:robolectric:$robolectric_version"
     testImplementation project(":kotlinx-coroutines-test")
     testImplementation project(":kotlinx-coroutines-android")
 }
diff --git a/ui/kotlinx-coroutines-android/build.gradle b/ui/kotlinx-coroutines-android/build.gradle
index b3075f780e..c05881eb6c 100644
--- a/ui/kotlinx-coroutines-android/build.gradle
+++ b/ui/kotlinx-coroutines-android/build.gradle
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ * Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
  */
 
 repositories {
@@ -18,12 +18,12 @@ configurations {
 }
 
 dependencies {
-    compileOnly 'com.google.android:android:4.1.1.4'
-    compileOnly 'com.android.support:support-annotations:26.1.0'
+    compileOnly "com.google.android:android:$android_version"
+    compileOnly "com.android.support:support-annotations:$android_support_version"
 
-    testImplementation 'com.google.android:android:4.1.1.4'
-    testImplementation 'org.robolectric:robolectric:4.0-alpha-3'
-    testImplementation 'org.smali:baksmali:2.2.7'
+    testImplementation "com.google.android:android:$android_version"
+    testImplementation "org.robolectric:robolectric:$robolectric_version"
+    testImplementation "org.smali:baksmali:$baksmali_version"
 
     // TODO Replace with a 1.6.x version once released to maven.google.com.
     r8 'com.android.tools:r8:a7ce65837bec81c62261bf0adac73d9c09d32af2'
diff --git a/ui/kotlinx-coroutines-javafx/build.gradle b/ui/kotlinx-coroutines-javafx/build.gradle
index 3b17101f53..9d1c128239 100644
--- a/ui/kotlinx-coroutines-javafx/build.gradle
+++ b/ui/kotlinx-coroutines-javafx/build.gradle
@@ -1,4 +1,41 @@
 /*
- * Copyright 2016-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ * Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
  */
 
+static int javaVersionMajor() {
+    String javaVersion = System.properties["java.version"]
+    int i = javaVersion.indexOf('.')
+    return (i < 0 ? javaVersion : javaVersion.substring(0, i)).toInteger()
+}
+
+// JDK11+ does not bundle JavaFx and the plugin for JavaFx support is compiled with class file version 55.0 (JDK 11)
+if (javaVersionMajor() >= 11) {
+    apply plugin: 'org.openjfx.javafxplugin'
+    
+    javafx {
+        version = javafx_version
+        modules = ['javafx.controls']
+        configuration = 'compile'
+    }
+}
+
+task checkJdk8() {
+    // only fail w/o JDK_18 when actually trying to test, not during project setup phase
+    doLast {
+        if (!System.env.JDK_18) {
+            throw new GradleException("JDK_18 environment variable is not defined. " +
+                    "Can't run JDK 8 compatibility tests. " +
+                    "Please ensure JDK 8 is installed and that JDK_18 points to it.")
+        }
+    }
+}
+
+task jdk8Test(type: Test, dependsOn: [compileTestKotlin, checkJdk8]) {
+    classpath = files { test.classpath }
+    testClassesDirs = files { test.testClassesDirs }
+    executable = "$System.env.JDK_18/bin/java"
+}
+
+// Run these tests only during nightly stress test
+jdk8Test.onlyIf { project.properties['stressTest'] != null }
+build.dependsOn jdk8Test
diff --git a/ui/kotlinx-coroutines-javafx/src/JavaFxDispatcher.kt b/ui/kotlinx-coroutines-javafx/src/JavaFxDispatcher.kt
index 4d7571c29f..e1e2d246b5 100644
--- a/ui/kotlinx-coroutines-javafx/src/JavaFxDispatcher.kt
+++ b/ui/kotlinx-coroutines-javafx/src/JavaFxDispatcher.kt
@@ -11,6 +11,7 @@ import javafx.util.*
 import kotlinx.coroutines.*
 import kotlinx.coroutines.internal.*
 import kotlinx.coroutines.javafx.JavaFx.delay
+import java.lang.UnsupportedOperationException
 import java.lang.reflect.*
 import java.util.concurrent.*
 import kotlin.coroutines.*
@@ -115,6 +116,7 @@ private class PulseTimer : AnimationTimer() {
     }
 }
 
+/** @return [true] if initialized successfully, and [false] if no display is detected */
 internal fun initPlatform(): Boolean = PlatformInitializer.success
 
 // Lazily try to initialize JavaFx platform just once
@@ -122,34 +124,34 @@ private object PlatformInitializer {
     val success = run {
         /*
          * Try to instantiate JavaFx platform in a way which works
-         * both on Java 8 and Java 11 and does not produce "illegal reflective access":
-         *
-         * 1) Try to invoke javafx.application.Platform.startup if this class is
-         *    present in a classpath.
-         * 2) If it is not successful and does not because it is already started,
-         *    fallback to PlatformImpl.
-         *
-         * Ignore exception anyway in case of unexpected changes in API, in that case
-         * user will have to instantiate it manually.
+         * both on Java 8 and Java 11 and does not produce "illegal reflective access".
          */
-        val runnable = Runnable {}
-        runCatching {
-            // Invoke public API if it is present
-            Class.forName("javafx.application.Platform")
-                .getMethod("startup", java.lang.Runnable::class.java)
-                .invoke(null, runnable)
-        }.recoverCatching { exception ->
-            // Recover -> check re-initialization
-            val cause = exception.cause
-            if (exception is InvocationTargetException && cause is IllegalStateException
-                && "Toolkit already initialized" == cause.message) {
-                // Toolkit is already initialized -> success, return
-                Unit
-            } else { // Fallback to Java 8 API
-                Class.forName("com.sun.javafx.application.PlatformImpl")
+        try {
+            val runnable = Runnable {}
+            // Invoke the public API if it is present.
+            runCatching {
+                Class.forName("javafx.application.Platform")
+                        .getMethod("startup", java.lang.Runnable::class.java)
+            }.map { method ->
+                method.invoke(null, runnable)
+                return@run true
+            }
+            // If we are here, it means the public API is not present. Try the private API.
+            Class.forName("com.sun.javafx.application.PlatformImpl")
                     .getMethod("startup", java.lang.Runnable::class.java)
                     .invoke(null, runnable)
+            true
+        } catch (exception: InvocationTargetException) {
+            // Can only happen as a result of [Method.invoke].
+            val cause = exception.cause!!
+            when {
+                // Maybe the problem is that JavaFX is already initialized? Everything is good then.
+                cause is IllegalStateException && "Toolkit already initialized" == cause.message -> true
+                // If the problem is the headless environment, it is okay.
+                cause is UnsupportedOperationException && "Unable to open DISPLAY" == cause.message -> false
+                // Otherwise, the exception demonstrates an anomaly.
+                else -> throw cause
             }
-        }.isSuccess
+        }
     }
 }
diff --git a/ui/kotlinx-coroutines-swing/build.gradle b/ui/kotlinx-coroutines-swing/build.gradle
index 31761abe10..ad8bef0e2f 100644
--- a/ui/kotlinx-coroutines-swing/build.gradle
+++ b/ui/kotlinx-coroutines-swing/build.gradle
@@ -1,7 +1,7 @@
 /*
- * Copyright 2016-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ * Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
  */
 
 dependencies {
     testCompile project(':kotlinx-coroutines-jdk8')
-}
\ No newline at end of file
+}
diff --git a/ui/kotlinx-coroutines-swing/test/SwingTest.kt b/ui/kotlinx-coroutines-swing/test/SwingTest.kt
index 8b41b494cc..cbed5bf1e9 100644
--- a/ui/kotlinx-coroutines-swing/test/SwingTest.kt
+++ b/ui/kotlinx-coroutines-swing/test/SwingTest.kt
@@ -1,10 +1,9 @@
 /*
- * Copyright 2016-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ * Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
  */
 
 package kotlinx.coroutines.swing
 
-import javafx.application.*
 import kotlinx.coroutines.*
 import org.junit.*
 import org.junit.Test
@@ -81,7 +80,7 @@ class SwingTest : TestBase() {
         join(component)
     }
 
-    private suspend fun join(component: SwingTest.SwingComponent) {
+    private suspend fun join(component: SwingComponent) {
         component.coroutineContext[Job]!!.join()
     }