The release of Java SE 15 in Sept 2020 will introduce "sealed classes" (JEP 360) as a preview feature. A sealed class is a class or interface which restricts which other classes or interfaces may ...

For JavaOne 2010 , Mark Reinhold will be presenting "JDK 7 and Java SE 7" (S314556) at 10 am on Monday, September 20, at Hilton San Francisco in the Grand Ballroom AB.