/dpt/ - Daily Programming Thread

What are you working on, /g/?

What license do you guys use on your homework exercises?
I tend to use the GPLv3 because it's the only license that makes sure your code is completely free, so nobody can sell it except you.
Here's my first exercise, in case you want to extend or share it:

/*
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
public class HelloWorld {
public static void main(String args[]) {
System.out.println("Hello, World!");
}
}