a program that fails only when run as a macOS bundled app

[Alan Snyder]

I’ve run into a strange situation, a tiny Java Swing program that works when run from the command line (java -jar) but fails when run as a macOS
bundled app created by the packager. I am using Java 10:

java version "10" 2018-03-20
Java(TM) SE Runtime Environment 18.3 (build 10+46)
Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10+46, mixed mode)

The specific error appears to involve creating a window with an unsupported set of style bits. A similar error is described in JDK-8181476 [1].
NSWindow logs an assertion error. The problem does not arise in Java 8, probably because it uses a different set of style bits.

Does anyone have an idea why the behavior would be different for the bundled app vs the command line?

Anyone willing to take a look at it?

Alan


[1] https://bugs.openjdk.java.net/browse/JDK-8181476 <https://bugs.openjdk.java.net/browse/JDK-8181476>


package test;

import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class Test
{
public Test()
{
// This frame is always displayed:
JFrame fr1 = new JFrame("Test 1");
fr1.getRootPane().putClientProperty("Window.style", "small");
fr1.setResizable(false);
fr1.setBounds(0, 0, 200, 200);
fr1.setVisible(true);

// This frame fails to display when run as a Java 10 bundled app:
JFrame fr2 = new JFrame("Test 2");
fr2.getRootPane().putClientProperty("Window.style", "small");
fr2.setBounds(300, 0, 200, 200);
fr2.setVisible(true);
}

public static void main(String[] args)
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
new Test();
}
});
}
}