Is it possible to have a java swing border only on the top side?

Question

I know how to create borders using BorderFactory but I don't see anything that lets me specify what sides I want the border on :S

Answer 1

Matte and empty border allow you to specify the sizes on each side, which may be zero.

The Border interface itself is quite easy to implement yourself if you want a custom look. I guess there may be third party libraries available containing styles not included within the Java library.

Answer 2

You can use the MatteBorder to specify the dimensions of the border in each side. The contructor of MatteBorder is:

public MatteBorder(int top,
                   int left,
                   int bottom,
                   int right,
                   Color matteColor)

So if you want to have a border only on the bottom and right sides of your JPanel, you could write something like that:

JPanel panel = new JPanel();
panel.setBorder(BorderFactory.createMatteBorder(0, 0, 1, 1, Color.BLACK);

Answer 3

From Sun tutorial:

The next picture shows some matte borders. When creating a matte border, you specify how many pixels it occupies at the top, left, bottom, and right of a component.

(Java docs)