There is a couple methods in 'sun.java2d.opengl.GLXSurfaceData' which call 'Math.ceil' with 'int' argument. Calling Math.ceil with integer argument is useless - it will just return the same passed value.

sun.java2d.opengl.GLXSurfaceData.GLXOffScreenSurfaceData#getBounds:

        public Rectangle getBounds() {
            if (type == FLIP_BACKBUFFER) {
                Rectangle r = peer.getBounds();
                r.x = r.y = 0;
                r.width = (int) Math.ceil(r.width * scale);
                r.height = (int) Math.ceil(r.height * scale);
                return r;
            } else {
                return new Rectangle(width, height);
            }
        }

sun.java2d.opengl.GLXSurfaceData.GLXWindowSurfaceData#getBounds

        public Rectangle getBounds() {
            Rectangle r = peer.getBounds();
            r.x = r.y = 0;
            r.width = (int) Math.ceil(r.width * scale);
            r.height = (int) Math.ceil(r.height * scale);
            return r;
        }

All 4 calls are useless. Seems we should remove it.