swing - JTattoo to make Round buttons in java - Stack Overflow
Java Swing Tips: Rounded Corner JButton
A simple demonstration of the LineBorder class built with rounded corners : Border « Swing JFC « Java
java - Button with round edges - Stack Overflow
Draws a 100 by 50 rectangle with a solid blue fill, a black outline, and rounded corners : Rectangle « Windows Presentation Foundation « VB.Net Tutorial