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 ListCellRender

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