This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I disagree. It's no descendant of JComponent, but that's the only thing that would make it "not Swing", according to you. However, JComponent itself extends Container which extends Component, so both JFrame and JComponent have their roots in AWT. Also, JFrame uses several Swing components (JRootPane, JLayeredPane, JPanel for its content pane) for displaying the actual contents.