使用EventHandler更改java图形
每当用户按下箭头DOWN
,我的程序就会绘制不同的图形。我使用了Enum来实现这一点,我将逐一查看,并在按下向下箭头时显示所选类型的图形
在这一刻,我有三种类型的图形,每当我把它们全部返回到第一种时,我的程序就会抛出java.lang.IllegalStateException: Not on FX application thread; currentThread = AWT-EventQueue-0
public class Main extends javax.swing.JFrame {
private static void initAndShowGUI() {
JFrame frame = new JFrame("JavaFX in Swing");
frame.setLayout(new BorderLayout());
Charts charts = new Charts();
frame.setContentPane(charts);
frame.setSize(1024, 720); //Size of dispalayed window
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
//java.awt.EventQueue.invokeLater
public void run() {
initAndShowGUI();
}
});
}
}
public class Charts extends JPanel{
private JFXPanel jfxPanel = new JFXPanel();
private i = 0;
public Charts(){
//show first graph so window won't be empty
drawLineChart(jfxPanel);
registerKeyboardAction((ActionEvent e) -> {
switch(chartParams[i].toString()){
case "BarChart":
drawBarChart(jfxPanel);
i++;
break;
case "PieChart":
drawPieChart(jfxPanel);
i++;
break;
case "LineChart":
i = 0;
drawLineChart(jfxPanel);
break;
default:
i = 0;
System.out.println("Wrong Parameters!");
}
System.out.println(i+ ", ");
}, KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0), WHEN_IN_FOCUSED_WINDOW);
add(jfxPanel,BorderLayout.CENTER);
}
}
所有draw...
方法都可以为空
我犯了一个错误
我犯了这个错误
Exception in thread "AWT-EventQueue-0" java.lang.IllegalStateException: Not on FX application thread; currentThread = AWT-EventQueue-0
at com.sun.javafx.tk.Toolkit.checkFxUserThread(Toolkit.java:279)
at com.sun.javafx.tk.quantum.QuantumToolkit.checkFxUserThread(QuantumToolkit.java:423)
at javafx.scene.Parent$2.onProposedChange(Parent.java:367)
at com.sun.javafx.collections.VetoableListDecorator.remove(VetoableListDecorator.java:329)
at com.sun.javafx.collections.VetoableListDecorator.remove(VetoableListDecorator.java:221)
at javafx.scene.Parent$1.onChanged(Parent.java:246)
at com.sun.javafx.collections.TrackableObservableList.lambda$new$29(TrackableObservableList.java:45)
at com.sun.javafx.collections.ListListenerHelper$Generic.fireValueChangedEvent(ListListenerHelper.java:329)
at com.sun.javafx.collections.ListListenerHelper.fireValueChangedEvent(ListListenerHelper.java:73)
at javafx.collections.ObservableListBase.fireChange(ObservableListBase.java:233)
at javafx.collections.ListChangeBuilder.commit(ListChangeBuilder.java:482)
at javafx.collections.ListChangeBuilder.endChange(ListChangeBuilder.java:541)
at javafx.collections.ObservableListBase.endChange(ObservableListBase.java:205)
at javafx.collections.ModifiableObservableListBase.addAll(ModifiableObservableListBase.java:102)
at com.sun.javafx.collections.VetoableListDecorator.addAll(VetoableListDecorator.java:237)
at com.sun.javafx.collections.VetoableListDecorator.addAll(VetoableListDecorator.java:103)
at javafx.scene.chart.XYChart.<init>(XYChart.java:444)
at javafx.scene.chart.BarChart.<init>(BarChart.java:154)
at javafx.scene.chart.BarChart.<init>(BarChart.java:142)
at cz.test.hibernate.Charts.drawBarChart(Charts.java:210)
at cz.test.hibernate.Charts.lambda$new$0(Charts.java:73)
at javax.swing.JComponent$ActionStandin.actionPerformed(JComponent.java:3425)
at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1663)
at javax.swing.JComponent.processKeyBinding(JComponent.java:2882)
at javax.swing.KeyboardManager.fireBinding(KeyboardManager.java:307)
at javax.swing.KeyboardManager.fireKeyboardAction(KeyboardManager.java:250)
at javax.swing.JComponent.processKeyBindingsForAllComponents(JComponent.java:2974)
at javax.swing.JComponent.processKeyBindings(JComponent.java:2966)
at javax.swing.JComponent.processKeyEvent(JComponent.java:2845)
at javafx.embed.swing.JFXPanel.processKeyEvent(JFXPanel.java:497)
at java.awt.Component.processEvent(Component.java:6310)
at java.awt.Container.processEvent(Container.java:2237)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2295)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:835)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1103)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:974)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:800)
at java.awt.Component.dispatchEventImpl(Component.java:4760)
at java.awt.Container.dispatchEventImpl(Container.java:2295)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
at java.awt.EventQueue$4.run(EventQueue.java:733)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.security.AccessController.doPrivileged(Native Method)1,
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
当我这样使用Platform.runLater()
Platform.runLater(new Runnable() {
@Override
//java.awt.EventQueue.invokeLater
public void run() {
initAndShowGUI();
}
});
事情就是这样:
Exception in thread "main" java.lang.IllegalStateException: Toolkit not initialized
at com.sun.javafx.application.PlatformImpl.runLater(PlatformImpl.java:273)
at com.sun.javafx.application.PlatformImpl.runLater(PlatformImpl.java:268)
at javafx.application.Platform.runLater(Platform.java:83)
at cz.test.hibernate.Main.main(Main.java:109)
我该如何解决这个问题?
这个问题可以是JavaFX
和Swing
的组合吗
# 1 楼答案
好吧,有两个主要错误,然后是一个。第一个是我写的《指挥》节目,所以我要先回答
这可以通过注释中提到的
Platform.runLater()
@john16384
来解决。但这应该用在class Charts
这样它就可以用FX线程来修复错误。但下一个错误可能会出现
例如,如果你想画
BarChart
,你必须初始化CategoryAxis
和NumberAxis
。在这个方法中,不像我之前声明和初始化它们时那样。 因为如果你这样做的话,这些Axis
会多扩展50%,这意味着你的图会小50%