{
JSlider slider1 = new JSlider(JSlider.HORIZONTAL);
slider1.setBounds(10, 20, 400, 40);
BasicSliderUI ui1 = new BasicSliderUI(slider1);
slider1.setUI(ui1);
harness.check(ui1.valueForXPosition(0), 0);
harness.check(ui1.valueForXPosition(200), 50);
harness.check(ui1.valueForXPosition(400), 100);
harness.check(ui1.valueForXPosition(-50), 0);
harness.check(ui1.valueForXPosition(450), 100);
}