[ Thanks to emyar for this link.
]
At JavaOne in May, 2006, Sun Microsystems announced they were
going to release Java as free software under the terms of the GPL.
The size of the task (6.5 million lines of code) was only eclipsed
by the size of the opportunity for Java as a free and open
technology.“At JavaOne in May 2007, Sun announced that the work was largely
completed and so OpenJDK was launched. What was less newsworthy was
the fact that on release–OpenJDK still relied on code that was
encumbered–between 4 and 5 percent of the code was closed, non
free source that Sun didn’t own…”