检测 JSplitPane 分隔线移动

有没有办法检测 JSplitPane 分隔线何时移动？有没有办法为分隔线移动添加监听器？

JPanel panel1 = new JPanel();
JPanel panel2 = new JPanel();
JSplitPane sp = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, panel1, panel2);
// What do I put here to be notified if the divider in sp is moved?

我想你正在寻找添加属性更改监听器 http://docs.oracle.com/javase/7/docs/api/java/awt/Container.html#addPropertyChangeListener%28java.beans.PropertyChangeListener%29 from Container。像这样的东西...

sp.addPropertyChangeListener(JSplitPane.DIVIDER_LOCATION_PROPERTY, 
    new PropertyChangeListener() {
        @Override
        public void propertyChange(PropertyChangeEvent pce) {}
});