javafx argument type mismatch 异常

错误代码：

<children>        <Button fx:id="myButton" layoutX="60.0" layoutY="73.0" mnemonicParsing="false" onMouseClicked="#showDateTime"  PRefHeight="23.0" prefWidth="120.0" text="Show Date Time" />        <TextField fx:id="myTextField" layoutX="60.0" layoutY="155.0" />    </children>

修改里面的onMouseClicked="#showDateTime"  为：onAction="#showDateTime"

就可以解决这个问题