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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
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/* @test
 * @bug 4677611
 * @summary JViewport sets Opaque after UpdateUI (prevents UI delegates
 * to determine look)
 * @run main bug4677611
 */

import java.awt.Color;

import javax.swing.JScrollPane;
import javax.swing.JViewport;

public class bug4677611 {
    public static void main(String[] args) throws Exception {
        JScrollPane sp = new JScrollPane();
        JViewport vp = new MyViewport();
        vp.setBackground(Color.blue);
        sp.setViewport(vp);

        if (vp.isOpaque()) {
            throw new RuntimeException("JViewport shouldn't set Opaque " +
                    "after update the UI");
        }
    }

    static class MyViewport extends JViewport {
        public void updateUI() {
            setOpaque(false);
            super.updateUI();
        }
    }
}