Changing JList row color at runtime

Question

I am trying to change JList rows dynamically. I need change nth row colour, highlight it(n is unknown during compilation). I saw a lot of examples with custom ListCellRenderer, but all were "static".

In other words I have JList with x rows. During runtime my "business logic" detects nth row is important. So I want make its background green, wait one second, and then make it white again. One more thing, don't wan change row selection.

What is the best way to do so?

Answer 1

Simple, set a custom ListCellRenderer to your JList using:

list.setCellRenderer(myListCellrenderer);

Now inside the overridden method getListCellRendererComponent() do something like this:

public Component getListCellRendererComponent(.....) {
    Component c = super.getListCellRendererComponent();
    c.setBackGround(Color.blue)
    return c;
}

The above example assumed that your custom renderer overrid DefaultListCellRenderer