NPE when using UIUtil on linux

[i-n-g-o]

hi.

when initializing on linux (this is on ubuntu in a VM with oracle java 1.8.0_121) initSystemFontData() in UIUtil.java line 254 throws a NPE because font is null.

getLabelFont() returns null.

(UIUtil.initSystemFontData() gets called because the System property "hidpi" is not set. looking into JBUI.java:47 it sets the scaleFactor = 1.0f; if hidpi != null and not "true")

a workaround is to set hidpi=false and avoid the call to initSystemFontData() alltogether.

the real question is: why does getLabelFont() return null?

using this test application:

import javax.swing.*;

public class Darculatest
{
	public static void main(String[] args) {

		System.out.println("setting look and feel");

		try {

			UIManager.setLookAndFeel("com.bulenkov.darcula.DarculaLaf");
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

throws this exceptions:

setting look and feel
Exception in thread "main" java.lang.ExceptionInInitializerError
	at com.bulenkov.iconloader.IconLoader.<clinit>(IconLoader.java:53)
	at com.bulenkov.darcula.DarculaLaf.getDefaults(DarculaLaf.java:97)
	at javax.swing.UIManager.setLookAndFeel(UIManager.java:539)
	at javax.swing.UIManager.setLookAndFeel(UIManager.java:583)
	at Darculatest.main(Darculatest.java:11)
Caused by: java.lang.NullPointerException
	at com.bulenkov.iconloader.util.UIUtil.initSystemFontData(UIUtil.java:254)
	at com.bulenkov.iconloader.util.JBUI.calculateScaleFactor(JBUI.java:47)
	at com.bulenkov.iconloader.util.JBUI.<clinit>(JBUI.java:33)
	... 5 more

[wikes82]

I'm having this same issue, I found workaround by calling javax.swing.UIManager.getFont("Label.font"); before setting the L&F

[acely]

Have the same issue on linux, @bulenkov maybe it needs fixing.