我试图在JRE 8中显示一个标签,说明所有内容都只有3秒,因为我无法在JRE 7中使用DatePicker而且我发现了这个错误. @H_502_2@Exception in thread "Timer-2" java.lang.IllegalStateException: Not on FX application thread; currentThread = Timer-2 at com.sun.javafx.tk.Toolkit.checkFxUserThread(Unknown Source) at com.sun.javafx.tk.quantum.QuantumToolkit.checkFxUserThread(Unknown Source) at javafx.scene.Scene.addToDirtyList(Unknown Source) at javafx.scene.Node.addToSceneDirtyList(Unknown Source) at javafx.scene.Node.impl_markDirty(Unknown Source) at javafx.scene.Node$7.invalidated(Unknown Source) at javafx.beans.property.BooleanPropertyBase.markInvalid(Unknown Source) at javafx.beans.property.BooleanPropertyBase.set(Unknown Source) at javafx.css.StyleableBooleanProperty.set(Unknown Source) at javafx.scene.Node.setVisible(Unknown Source) at Pantallas.PersonalContabilidad$1.run(PersonalContabilidad.java:221) at java.util.TimerThread.mainLoop(Unknown Source) at java.util.TimerThread.run(Unknown Source)

正确是一个标签,我显示3秒,它在correct.setVisible(false)失败;这是第221行

@H_502_2@correct.setVisible(true); timer.schedule(new TimerTask() { @Override public void run() { correct.setVisible(false); } },3*1000);