Please run the attached test case. The output will be (JDK9b115 + Win7):

>>> LISTENER: text changed

setter setAlignmentX, bound = true:
@java.beans.BeanProperty(expert=false, hidden=false, visualUpdate=false, bound=true, description=The preferred horizontal alignment of the component., enumerationValues=[], preferred=false, required=false)

setter setAlignmentY, bound = true:
@java.beans.BeanProperty(expert=false, hidden=false, visualUpdate=false, bound=true, description=The preferred vertical alignment of the component., enumerationValues=[], preferred=false, required=false)

>>> LISTENER: text changed

setter setAlignmentY, bound = true:
@java.beans.BeanProperty(expert=false, hidden=false, visualUpdate=false, bound=true, description=The preferred vertical alignment of the component., enumerationValues=[], preferred=false, required=false)


so no events when changing the alignments.

The JComponent's subclasses are affected (buttons, panes, menu items etc.)