Include JavaFX plugin (specify dependent JavaFX modules) and apply changes to relevant modules (explorer, demobench, client/jfx).

client/jfx/build.gradle

@@ -1,3 +1,13 @@
+// JDK 11 JavaFX
+plugins {
+    id 'org.openjfx.javafxplugin' version '0.0.7'
+}
+javafx {
+    modules = [ 'javafx.controls',
+                'javafx.fxml'
+    ]
+}
+
 apply plugin: 'kotlin'
 apply plugin: 'net.corda.plugins.quasar-utils'
 apply plugin: 'net.corda.plugins.publish-utils'

client/jfx/src/main/kotlin/net/corda/client/jfx/utils/AggregatedList.kt

@@ -41,6 +41,9 @@ class AggregatedList<A, E : Any, K : Any>(
         val toKey: (E) -> K,
         val assemble: (K, ObservableList<E>) -> A
 ) : TransformationList<A, E>(list) {
+    override fun getViewIndex(p0: Int): Int {
+        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
 
     private class AggregationGroup<E, out A>(
             val keyHashCode: Int,

client/jfx/src/main/kotlin/net/corda/client/jfx/utils/ConcatenatedList.kt

@@ -11,6 +11,10 @@ import java.util.*
  * is propagated as expected.
  */
 class ConcatenatedList<A>(sourceList: ObservableList<ObservableList<A>>) : TransformationList<A, ObservableList<A>>(sourceList) {
+    override fun getViewIndex(p0: Int): Int {
+        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
     // A wrapper for input lists so we hash differently even if a list is reused in the input.
     @VisibleForTesting
     internal class WrappedObservableList<A>(

client/jfx/src/main/kotlin/net/corda/client/jfx/utils/FlattenedList.kt

@@ -12,6 +12,9 @@ import java.util.*
  * are reflected in the exposed list as expected.
  */
 class FlattenedList<A>(val sourceList: ObservableList<out ObservableValue<out A>>) : TransformationList<A, ObservableValue<out A>>(sourceList) {
+    override fun getViewIndex(p0: Int): Int {
+        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
 
     /**
      * We maintain an ObservableValue->index map. This is needed because we need the ObservableValue's index in order to

client/jfx/src/main/kotlin/net/corda/client/jfx/utils/MappedList.kt

@@ -11,6 +11,10 @@ import java.util.*
  * Use this instead of [EasyBind.map] to trade off memory vs CPU, or if (god forbid) the mapped function is side-effecting.
  */
 class MappedList<A, B>(list: ObservableList<A>, val function: (A) -> B) : TransformationList<B, A>(list) {
+    override fun getViewIndex(p0: Int): Int {
+        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
     private val backingList = ArrayList<B>(list.size)
 
     init {

client/jfx/src/main/kotlin/net/corda/client/jfx/utils/ReplayedList.kt

@@ -10,6 +10,9 @@ import java.util.*
  * non-backed observable
  */
 class ReplayedList<A>(sourceList: ObservableList<A>) : TransformationList<A, A>(sourceList) {
+    override fun getViewIndex(p0: Int): Int {
+        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
 
     val replayedList = ArrayList<A>(sourceList)
 

tools/demobench/build.gradle

@@ -1,3 +1,14 @@
+// JDK 11 JavaFX
+plugins {
+    id 'org.openjfx.javafxplugin' version '0.0.7'
+}
+javafx {
+    modules = [ 'javafx.controls',
+                'javafx.fxml',
+                'javafx.swing'
+    ]
+}
+
 ext {
     tornadofx_version = '1.7.15'
     jna_version = '4.1.0'

tools/explorer/build.gradle

@@ -1,3 +1,14 @@
+// JDK 11 JavaFX
+plugins {
+    id 'org.openjfx.javafxplugin' version '0.0.7'
+}
+javafx {
+    modules = [ 'javafx.controls',
+                'javafx.fxml',
+                'javafx.swing'
+    ]
+}
+
 apply plugin: 'java'
 apply plugin: 'kotlin'
 apply plugin: 'application'

tools/network-bootstrapper/build.gradle

@@ -1,3 +1,14 @@
+// JDK 11 JavaFX
+plugins {
+    id 'org.openjfx.javafxplugin' version '0.0.7'
+}
+javafx {
+    modules = [ 'javafx.controls',
+                'javafx.fxml',
+                'javafx.swing'
+    ]
+}
+
 ext {
     tornadofx_version = '1.7.15'
     controlsfx_version = '8.40.12'

webserver/src/main/java/CordaWebserverCaplet.java

@@ -174,8 +174,8 @@ public class CordaWebserverCaplet extends Capsule {
 
     private static void checkJavaVersion() {
         String version = System.getProperty("java.version");
-        if (version == null || !version.startsWith("1.8")) {
-            System.err.printf("Error: Unsupported Java version %s; currently only version 1.8 is supported.\n", version);
+        if (version == null || Arrays.asList("1.8", "11").stream().noneMatch(version::startsWith)) {
+            System.err.printf("Error: Unsupported Java version %s; currently only version 1.8 or 11 is supported.\n", version);
             System.exit(1);
         }
     }