我可以修改现有对象的JComboBox弹出背景颜色吗？

I have an existing JComboBox object. I can modify many of its properties using the internal methods. However, I could not find similar methods to customize the popup's appearance - specifically, the popup's background color. I have an existing object, so I wish to use its existing methods/properties, not to write a dedicated class. Is this possible?I have an existing JComboBox object. I can modi