Strange JavaFX Application Thread exception - javafx

Question

We are making a card game named Dominion with client-server, using Java Serialization. We are working also with observer/observable and threads (threads for reading messages on server and client side).
We are highlighting the card with CSS if a player is able to play or buy a card. The highlight is added by the update methode of the interface Observer where a gamecard is being observed. If a specific condition is true, we will add the highlight to the gamecard (class GameCard is implements Observer).
In general it works fine, but there is a card (named Militia) which forces the opponents to discard cards from their hand until they got only 3 cards left. We can play this for several times without exceptions, but suddenly there are several exceptions (after about 7-10 times played the Militia cards). We have no idea why.
What could be the reason of this exceptions? I think it doesn't help if I post the code, I will post the exceptions:
Exception in thread "JavaFX Application Thread" java.lang.NullPointerException
at com.sun.javafx.text.PrismTextLayout.addTextRun(PrismTextLayout.java:755)
at com.sun.javafx.text.GlyphLayout.addTextRun(GlyphLayout.java:140)
at com.sun.javafx.text.GlyphLayout.breakRuns(GlyphLayout.java:210)
at com.sun.javafx.text.PrismTextLayout.buildRuns(PrismTextLayout.java:770)
at com.sun.javafx.text.PrismTextLayout.layout(PrismTextLayout.java:1021)
at com.sun.javafx.text.PrismTextLayout.ensureLayout(PrismTextLayout.java:223)
at com.sun.javafx.text.PrismTextLayout.getBounds(PrismTextLayout.java:246)
at javafx.scene.text.Text.getLogicalBounds(Text.java:358)
at javafx.scene.text.Text.impl_computeGeomBounds(Text.java:1168)
at javafx.scene.Node.updateGeomBounds(Node.java:3579)
at javafx.scene.Node.getGeomBounds(Node.java:3532)
at javafx.scene.Node.getLocalBounds(Node.java:3480)
at javafx.scene.Node.updateTxBounds(Node.java:3643)
at javafx.scene.Node.getTransformedBounds(Node.java:3426)
at javafx.scene.Parent.getChildTransformedBounds(Parent.java:1732)
at javafx.scene.Parent.recomputeBounds(Parent.java:1524)
at javafx.scene.Parent.impl_computeGeomBounds(Parent.java:1388)
at javafx.scene.Node.updateGeomBounds(Node.java:3579)
at javafx.scene.Node.getGeomBounds(Node.java:3532)
at javafx.scene.Node.getLocalBounds(Node.java:3480)
at javafx.scene.Node.updateTxBounds(Node.java:3643)
at javafx.scene.Node.getTransformedBounds(Node.java:3426)
at javafx.scene.Parent.getChildTransformedBounds(Parent.java:1732)
at javafx.scene.Parent.updateCachedBounds(Parent.java:1596)
at javafx.scene.Parent.recomputeBounds(Parent.java:1535)
at javafx.scene.Parent.impl_computeGeomBounds(Parent.java:1388)
at javafx.scene.layout.Region.impl_computeGeomBounds(Region.java:3078)
at javafx.scene.Node.updateGeomBounds(Node.java:3579)
at javafx.scene.Node.getGeomBounds(Node.java:3532)
at javafx.scene.Node.getLocalBounds(Node.java:3480)
at javafx.scene.Node.updateTxBounds(Node.java:3643)
at javafx.scene.Node.getTransformedBounds(Node.java:3426)
at javafx.scene.Parent.getChildTransformedBounds(Parent.java:1732)
at javafx.scene.Parent.recomputeBounds(Parent.java:1524)
at javafx.scene.Parent.impl_computeGeomBounds(Parent.java:1388)
at javafx.scene.layout.Region.impl_computeGeomBounds(Region.java:3078)
at javafx.scene.Node.updateGeomBounds(Node.java:3579)
at javafx.scene.Node.getGeomBounds(Node.java:3532)
at javafx.scene.Node.getLocalBounds(Node.java:3480)
at javafx.scene.Node.updateTxBounds(Node.java:3643)
at javafx.scene.Node.getTransformedBounds(Node.java:3426)
at javafx.scene.Parent.getChildTransformedBounds(Parent.java:1732)
at javafx.scene.Parent.recomputeBounds(Parent.java:1524)
at javafx.scene.Parent.impl_computeGeomBounds(Parent.java:1388)
at javafx.scene.layout.Region.impl_computeGeomBounds(Region.java:3078)
at javafx.scene.Node.updateGeomBounds(Node.java:3579)
at javafx.scene.Node.getGeomBounds(Node.java:3532)
at javafx.scene.Node.computeLocalBounds(Node.java:3595)
at javafx.scene.Node.updateLocalBounds(Node.java:3625)
at javafx.scene.Node.getLocalBounds(Node.java:3486)
at javafx.scene.Node.updateTxBounds(Node.java:3643)
at javafx.scene.Node.getTransformedBounds(Node.java:3426)
at javafx.scene.Parent.getChildTransformedBounds(Parent.java:1732)
at javafx.scene.Parent.updateCachedBounds(Parent.java:1596)
at javafx.scene.Parent.recomputeBounds(Parent.java:1535)
at javafx.scene.Parent.impl_computeGeomBounds(Parent.java:1388)
at javafx.scene.layout.Region.impl_computeGeomBounds(Region.java:3078)
at javafx.scene.Node.updateGeomBounds(Node.java:3579)
at javafx.scene.Node.getGeomBounds(Node.java:3532)
at javafx.scene.Node.getLocalBounds(Node.java:3480)
at javafx.scene.Node.updateTxBounds(Node.java:3643)
at javafx.scene.Node.getTransformedBounds(Node.java:3426)
at javafx.scene.Parent.getChildTransformedBounds(Parent.java:1732)
at javafx.scene.Parent.recomputeBounds(Parent.java:1524)
at javafx.scene.Parent.impl_computeGeomBounds(Parent.java:1388)
at javafx.scene.layout.Region.impl_computeGeomBounds(Region.java:3078)
at javafx.scene.Node.updateGeomBounds(Node.java:3579)
at javafx.scene.Node.getGeomBounds(Node.java:3532)
at javafx.scene.Node.getLocalBounds(Node.java:3480)
at javafx.scene.Node.updateTxBounds(Node.java:3643)
at javafx.scene.Node.getTransformedBounds(Node.java:3426)
at javafx.scene.Parent.getChildTransformedBounds(Parent.java:1732)
at javafx.scene.Parent.recomputeBounds(Parent.java:1524)
at javafx.scene.Parent.impl_computeGeomBounds(Parent.java:1388)
at javafx.scene.layout.Region.impl_computeGeomBounds(Region.java:3078)
at javafx.scene.Node.updateGeomBounds(Node.java:3579)
at javafx.scene.Node.getGeomBounds(Node.java:3532)
at javafx.scene.Node.getLocalBounds(Node.java:3480)
at javafx.scene.Node.updateTxBounds(Node.java:3643)
at javafx.scene.Node.getTransformedBounds(Node.java:3426)
at javafx.scene.Parent.getChildTransformedBounds(Parent.java:1732)
at javafx.scene.Parent.updateCachedBounds(Parent.java:1596)
at javafx.scene.Parent.recomputeBounds(Parent.java:1535)
at javafx.scene.Parent.impl_computeGeomBounds(Parent.java:1388)
at javafx.scene.layout.Region.impl_computeGeomBounds(Region.java:3078)
at javafx.scene.Node.updateGeomBounds(Node.java:3579)
at javafx.scene.Node.getGeomBounds(Node.java:3532)
at javafx.scene.Node.getLocalBounds(Node.java:3480)
at javafx.scene.Node.updateTxBounds(Node.java:3643)
at javafx.scene.Node.getTransformedBounds(Node.java:3426)
at javafx.scene.Parent.getChildTransformedBounds(Parent.java:1732)
at javafx.scene.Parent.recomputeBounds(Parent.java:1524)
at javafx.scene.Parent.impl_computeGeomBounds(Parent.java:1388)
at javafx.scene.layout.Region.impl_computeGeomBounds(Region.java:3078)
at javafx.scene.Node.updateGeomBounds(Node.java:3579)
at javafx.scene.Node.getGeomBounds(Node.java:3532)
at javafx.scene.Node.getLocalBounds(Node.java:3480)
at javafx.scene.Node.updateTxBounds(Node.java:3643)
at javafx.scene.Node.getTransformedBounds(Node.java:3426)
at javafx.scene.Parent.getChildTransformedBounds(Parent.java:1732)
at javafx.scene.Parent.updateCachedBounds(Parent.java:1596)
at javafx.scene.Parent.recomputeBounds(Parent.java:1535)
at javafx.scene.Parent.impl_computeGeomBounds(Parent.java:1388)
at javafx.scene.layout.Region.impl_computeGeomBounds(Region.java:3078)
at javafx.scene.Node.updateGeomBounds(Node.java:3579)
at javafx.scene.Node.getGeomBounds(Node.java:3532)
at javafx.scene.Node.getLocalBounds(Node.java:3480)
at javafx.scene.Node.impl_intersectsBounds(Node.java:5015)
at javafx.scene.layout.Region.impl_pickNodeLocal(Region.java:2931)
at javafx.scene.Node.impl_pickNode(Node.java:4914)
at javafx.scene.Scene$MouseHandler.pickNode(Scene.java:3899)
at javafx.scene.Scene$MouseHandler.access$1600(Scene.java:3485)
at javafx.scene.Scene.pick(Scene.java:1942)
at javafx.scene.Scene.access$6700(Scene.java:159)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3711)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:381)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$353(GlassViewEventHandler.java:417)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:416)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$147(WinApplication.java:177)
at java.lang.Thread.run(Unknown Source)
Exception in thread "JavaFX Application Thread" java.lang.ArrayIndexOutOfBoundsException: -1
at java.util.ArrayList.elementData(Unknown Source)
at java.util.ArrayList.get(Unknown Source)
at com.sun.javafx.collections.ObservableListWrapper.get(ObservableListWrapper.java:89)
at com.sun.javafx.collections.VetoableListDecorator.get(VetoableListDecorator.java:306)
at javafx.scene.Parent.updateCachedBounds(Parent.java:1591)
at javafx.scene.Parent.recomputeBounds(Parent.java:1535)
at javafx.scene.Parent.impl_computeGeomBounds(Parent.java:1388)
at javafx.scene.layout.Region.impl_computeGeomBounds(Region.java:3078)
at javafx.scene.Node.updateGeomBounds(Node.java:3579)
at javafx.scene.Node.getGeomBounds(Node.java:3532)
at javafx.scene.Node.getLocalBounds(Node.java:3480)
at javafx.scene.Node.impl_intersectsBounds(Node.java:5015)
at javafx.scene.layout.Region.impl_pickNodeLocal(Region.java:2931)
at javafx.scene.Node.impl_pickNode(Node.java:4914)
at javafx.scene.Scene$MouseHandler.pickNode(Scene.java:3899)
at javafx.scene.Scene$MouseHandler.access$1600(Scene.java:3485)
at javafx.scene.Scene.pick(Scene.java:1942)
at javafx.scene.Scene.access$6700(Scene.java:159)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3711)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:381)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$353(GlassViewEventHandler.java:417)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:416)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$147(WinApplication.java:177)
at java.lang.Thread.run(Unknown Source)
Exception in thread "JavaFX Application Thread"
...and if we just mouse hover over the stage, it throws hundreds of times this exception:
Exception in thread "JavaFX Application Thread" java.lang.ArrayIndexOutOfBoundsException
Code which could cause the exceptions:
1. in this class we highlight the cards which the opponent has to discard (until he has left 3 cards; see line where croupier.isDiscardModeMilitia....)
public class GameCard extends Button implements Observer {
protected static final boolean MoneyCard = false;
ServiceLocatorClient sl = ServiceLocatorClient.getServiceLocator();
Croupier croupier = Croupier.getCroupier();
Label lbl_cardName;
String text_DE;
boolean holeCard = false;
int costs;
StackSizeInfo stackSizeInfo;
public GameCard(Label cardName, String text_DE) {
super();
this.lbl_cardName = cardName;
this.text_DE=text_DE;
this.assignPicture();
}
public GameCard(){
}
GameCard gc = this;
#Override
public void update(Observable arg0, Object arg1) {
getStyleClass().remove("highlight");
getStyleClass().remove("highlight2");
getStyleClass().remove("highlight3");
//Highlighte alle Karten im Kaufmodus, welche ich mit der aktuelln Buypower und buys kaufen kann
if (croupier.isBuyMode() == true && croupier.getBuyPower() >= this.costs && !this.isHoleCard() && croupier.getBuys() > 0){
this.getStyleClass().add("highlight");
}
//Highlighte alle Geldkarten im Kaufmodus
if (croupier.isBuyMode() == true && this.isHoleCard() && this instanceof MoneyCard){
this.getStyleClass().add("highlight");
}
//Highlighte alle Aktionskarten im Aktionsmodus
if (croupier.isActionMode() == true && this.isHoleCard() && this instanceof ActionCard){
this.getStyleClass().add("highlight");
}
//Highlighte alle HoleCards im Discardmodus (basement)
if (croupier.isDiscardMode() == true && this.isHoleCard()){
this.getStyleClass().add("highlight3");
}
//Highlighte alle HoleCards im TrashModus Kapelle
if (croupier.isTrashModeChapel() == true && this.isHoleCard()){
this.getStyleClass().add("highlight3");
}
//Highlighte alle MoneyCards im TrashModus Mine
if (croupier.isTrashModeMine() == true && this instanceof MoneyCard && this.isHoleCard()){
this.getStyleClass().add("highlight3");
}
//Highlighte alle Karten auf der Hand, welche im Umbaumodus weggeworfen werden können
if (croupier.isTrashModeRebuilding() == true && this.isHoleCard()){
this.getStyleClass().add("highlight3");
}
//Highlighte alle Kupferkarten auf der Hand, die gegen +3Geld weggeworfen werden können (ActionCard Geldverleiher)
if (croupier.isTrashModeMoneylender() == true && this.isHoleCard() && this.getLbl_cardName().getText().equals("copper")){
this.getStyleClass().add("highlight3");
}
//Highlighte alle MoneyCards, welche erworben werden können im Minen-Modus
if (croupier.isModeForMine() == true && this instanceof MoneyCard && !this.isHoleCard() && this.costs <= croupier.getSavedMCValueForMineMode()){
this.getStyleClass().add("highlight");
}
//Highlighte alle Karten zum Kauf, welche erworben werden können im Rebuilding-Modus
if (croupier.isModeForRebuilding() == true && !this.isHoleCard() && this.costs <= croupier.getCardValueForRebuildingMode()){
this.getStyleClass().add("highlight");
}
//Highlighte alle Karten zum Kauf, welche erworben werden können im Rebuilding-Modus
if (croupier.isModeForWorkshop() == true && !this.isHoleCard() && this.costs <= 4){
this.getStyleClass().add("highlight3");
}
//Highlighte alle Moat-Karten wenn ein Angriff gemacht worden ist
if (croupier.isReactionMode() == true && this.isHoleCard() && this.getLbl_cardName().getText().equals("moat")){
this.getStyleClass().add("highlight3");
}
//Highlighte alle Moat-Karten wenn ein Angriff gemacht worden ist
if (croupier.isDiscardModeMilitia() == true && this.isHoleCard()){
this.getStyleClass().add("highlight2");
}
//Highlighte alle Moat-Karten wenn ein Angriff gemacht worden ist
if (croupier.isModeForCurseCard() == true && !this.isHoleCard() && this.getLbl_cardName().getText().equals("curse")){
this.getStyleClass().add("highlight2");
}
//wenn stacksize auf 0, wird highlighting ebenfalls deaktiviert
if (croupier.getStackSize(gc) == 0) {
this.getStyleClass().remove("highlight");
}
//update das STackSize infoLabel auf der Karte
if (this.stackSizeInfo != null){
stackSizeInfo.updateStackSizeInfo();
}
}
public void assignStackSizeInfo(){
stackSizeInfo = new StackSizeInfo(gc,croupier.getStackSize(gc));
}
public void assignPicture(){
if (this.holeCard == false)
this.getStyleClass().addAll("card_mini",lbl_cardName.getText());
else
this.getStyleClass().addAll("card",lbl_cardName.getText()+"_big");
}
public boolean isHoleCard() {
return holeCard;
}
public void setHoleCard(boolean holeCard) {
this.holeCard = holeCard;
}
public Label getLbl_cardName() {
return lbl_cardName;
}
public String getText_DE(){
return this.text_DE;
}
public void setLbl_cardName(Label lbl_cardName) {
this.lbl_cardName = lbl_cardName;
}
}
possible code fragment: here we are updating the GUI. This happens whenever we play a card from the hand. We will remove it first from the LinkedList (HoleCards) in another method and then we call updateGUI
public void updateGUI() {
// Zeichne holeCards Neu
hb_wrapper_holeCards.getChildren().clear();
for (int i = 0; i < croupier.getHoleCards().size(); i++) {
GameCard gc1 = croupier.getHoleCards().get(i);
try{
hb_wrapper_holeCards.getChildren().add(gc1);
gc1.setPrefSize(160, 260);
gc1.setMaxWidth(160);
}catch (NullPointerException e){
//
}
// Zeichne Ablagekarte neu
hb_wrapper_stapel.getChildren().clear();
dummyCardAblagestapel.getStyleClass().clear();
try {
String cssSelector = new String(croupier.getAblagestapel().peekLast().getLbl_cardName().getText()+"_big");
dummyCardAblagestapel.getStyleClass().addAll("card",cssSelector);
hb_wrapper_stapel.getChildren().addAll(dummyCardAblagestapel,nachziehstapel);
} catch(Exception e){
hb_wrapper_stapel.getChildren().addAll(this.dummyCardAblagestapel,nachziehstapel);
}
}
}
note1: I guess it happens in the first fragment where we highlight the cards. After a player has discarded cards until he has only 3 left in the hand, we will remove the highlight. Exactly when he discards his last card, the exception is thrown (but as I said, we can play this for about 7-10 times without exceptions, but suddenly the exceptions are thrown)
note2: I have already tried with Platform.runLater on this 2 code fragments and it didn't help