Here a typical display offering to download the latest browser software:

This web page requires one of the following up-to-date browsers:
Click the corresponding browser icon to download the latest free browser software, or click the browser name for more information.
	Opera 9.27	with the Java 1.6.0_06 JRE (Java Runtime Environment). It is the fastest browser, especially at starting up. This is the browser I use myself, so it is the one most likely to render correctly. It is now free and ad-free.
	Firefox 2.0.0.14	with the Java 1.6.0_06 JRE (Java Runtime Environment). Most widely supported next to IE.
	Sea Monkey 1.1.9	with the Java 1.6.0_06 JRE (Java Runtime Environment). Similar to Firefox, with integrated Email.
	Safari 3.1.1	with the Java 1.6.0_06 JRE (Java Runtime Environment). Now works both on Macs and PCs. Some rendering problems.
	Flock 1.1.4	with the Java 1.6.0_06 JRE (Java Runtime Environment). Similar to Firefox for social networking.
	IE 8 beta (8.0.6001)	with the Java 1.6.0_06 JRE (Java Runtime Environment). It is pain to get Java Web Start working.
	IE 7 (7.0.6000)	with the Java 1.6.0_06 JRE (Java Runtime Environment). It is pain to get Java Web Start working.
	IE 6 (6.0.2800)	with the Java 1.6.0_06 JRE (Java Runtime Environment). Not secure.
	Sun’s Java	1.6.0_06 JRE (Java Runtime Environment)

You may not use either of Sun’s Java coffee cup logos, either the old style or the new orange style on your own projects or site. Sun reserves it for their exclusive use. There is a copy of the orange logo in C:\Program Files\java\jre1.6.0_06\lib\resources.jar called JavaCup32.png but you may not use it in your applications.

Sun has 22 logos for customer use. Most require that your program pass a test suite. The Jump To Java logo, the Get Java logo and the Get Java Powered logo merely require that you use Java on your website. You still must get permission first though.

However, you may use Duke and variations freely without permission.