FULL PRODUCT VERSION :


A DESCRIPTION OF THE PROBLEM :
We call JToggleButton#setBorderPainted(false).
With Java 9 and Windows LF (other LF not tested) the button has no longer a visual inidicator when the button is toggled in contrary to Java 8 where the button is light-blue-gray.

Tested with Java 9 b177, 8 u102, 8 u131, 8 u144 on Windows 7 and Windows 2012 R2.

It was recommended to fill a bug for this:
http://mail.openjdk.java.net/pipermail/swing-dev/2017-July/007663.html


REGRESSION. Last worked in version 8u144

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the reproducer.
Toggle/untoggle the JToggleButton and see that there is no visual difference (set focus to JTextField after toggle/untoggle).


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.JToggleButton;
import javax.swing.UIManager;
import javax.swing.WindowConstants;
import java.awt.BorderLayout;
import java.awt.EventQueue;

public final class Reproducer {
  public static void main(String[] args) throws Exception {
    EventQueue.invokeAndWait(new Runnable() {
      @Override
      public void run() {
        try {
          UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        } catch (Exception e) {
          e.printStackTrace();
          System.exit(1);
        }
      }
    });

    EventQueue.invokeLater(new Runnable() {
      @Override
      public void run() {
        JTextField text = new JTextField();

        JToggleButton button = new JToggleButton("Test");
        button.setBorderPainted(false);

        JPanel pane = new JPanel(new BorderLayout());
        pane.setBorder(BorderFactory.createEmptyBorder(8, 8, 8, 8));
        pane.add(text, BorderLayout.NORTH);
        pane.add(button, BorderLayout.SOUTH);

        JFrame frame = new JFrame();
        frame.getContentPane().add(pane);
        frame.setSize(200, 200);
        frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
        frame.setVisible(true);
      }
    });
  }
}

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

CUSTOMER SUBMITTED WORKAROUND :
Do not call JToggleButton#setBorderPainted(false).