How could I create badge icon by using Button？

[zjcscut]

like this，how could I change the border color for any button

[daviddev16]

Hi @zjcscut ! Hope you are doing well!

One thing that you could do is create a custom component with a custom button ui using BasicButtonUI. This example uses Flatlaf version 3.1.1.

In this case, a made a class called BadgedLabel that extends JPanel with a JButton and a JLabel in constructor constrained with the BoxLayout. The BadgedLabel class will be used as a model object in CustomList that extends JList and implements ListCellRenderer<BadgedLabel>. The BadgedLabel also contains the BadgeButtonUI which will be used to customize the JButton UI.

Inside CustomList we can create the BadgedLabel object and add to the JList custom model.

I hope I was able to help in someway!

code-example.zip