How java swing draws to screen from different operating systems?

Question

I know Swing use Java2d which extends AWT to draw on screen but, what low level toolkit is used by swing to render? GTK or QT for example?

Answer 1

Concrete implementations of Graphics2D on each supported platform direct painting to a heavyweight peer component provided by the host, e.g. Quartz on Mac OS X, Graphics Device Interface on Windows, and Xlib/XCB, part of the X Window System often used on Linux.