FULL PRODUCT VERSION :
java version "1.8.0_45"


ADDITIONAL OS VERSION INFORMATION :
SunOS NMSServer 5.10 Generic_150400-23 sun4u sparc SUNW,SPARC-Enterprise


A DESCRIPTION OF THE PROBLEM :
Painting the graphics with GradientPaint is not painted the GradientPaint color, instead it is painting black color.

this problem is exist in latest solaries envs
SunOS IMAPV3S011 5.10 Generic_150400-17 sun4v sparc SUNW,SPARC-Enterprise-T5220
SunOS NMSServer 5.10 Generic_150400-23 sun4u sparc SUNW,SPARC-Enterprise

Not exist in
 SunOS solaris-187 5.10 Generic_142909-17 sun4v sparc sun4v
SunOS solaris-91 5.10 Generic_142909-17 sun4v sparc sun4v

This problem is not exist with jre1.6_31 also

This problem not exist in windows os also

REGRESSION. Last worked in version 6u45

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile and run the attached source code in problem solarise and non problem solaries env .

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Tabs should paint with gradient paint color
ACTUAL -
Tabs are not paint with gradient paint color

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Paint;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.SwingUtilities;
import javax.swing.plaf.basic.BasicTabbedPaneUI;

public class TabbedPaneDemo1
{
    public static void main(String[] args)
    {
        final JFrame frame = new JFrame("TabbedPaneDemo");
        frame.setSize(300 , 400);
        frame.setLayout(new FlowLayout());
        JPanel panel = new JPanel();
        JTabbedPane pane = new JTabbedPane(JTabbedPane.TOP ,
                JTabbedPane.SCROLL_TAB_LAYOUT);
        pane.setPreferredSize(new Dimension(250 , 350));
        pane.setUI(new MyTabpaneUI());
        pane.addTab("Tab1" , new JPanel());
        pane.addTab("Tab2" , new JPanel());
        panel.add(pane);
        frame.add(panel);
        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        SwingUtilities.invokeLater(new Runnable()
        {

            @Override
            public void run()
            {
                frame.setVisible(true);
            }
        });

    }

}

class MyTabpaneUI extends BasicTabbedPaneUI
{
    protected void paintTabBackground(Graphics g , int tabPlacement ,
            int tabIndex , int x , int y1 , int w , int h , boolean isSelected)
    {
        super.paintTabBackground(g , tabPlacement , tabIndex , x , y1 , w , h ,
                isSelected);
        if (isSelected)
        {
            Paint paint = new GradientPaint(x , y1 , Color.white , x + w , y1
                    + h , Color.BLUE , true);

            Graphics2D g2D = (Graphics2D) g;
            g2D.setPaint(paint);
            g2D.fillRect(x , y1 , w , h);
        }

    }

}

---------- END SOURCE ----------