Null Pointer Exception on Start

[dpolivaev]

SwingSet2 demo with -Dswing.defaultlaf=com.bulenkov.darcula.DarculaLaf on Linux with Java 8 u 222 exits with exception

/home/dimitry/.sdkman/candidates/java/8.0.222-zulu/bin/java -Dswing.defaultlaf=com.bulenkov.darcula.DarculaLaf -javaagent:/home/dimitry/.local/share/JetBrains/Toolbox/apps/IDEA-C/ch-0/191.7479.19/lib/idea_rt.jar=40943:/home/dimitry/.local/share/JetBrains/Toolbox/apps/IDEA-C/ch-0/191.7479.19/bin -Dfile.encoding=UTF-8 -classpath /home/dimitry/.sdkman/candidates/java/8.0.222-zulu/jre/lib/charsets.jar:/home/dimitry/.sdkman/candidates/java/8.0.222-zulu/jre/lib/ext/cldrdata.jar:/home/dimitry/.sdkman/candidates/java/8.0.222-zulu/jre/lib/ext/dnsns.jar:/home/dimitry/.sdkman/candidates/java/8.0.222-zulu/jre/lib/ext/jaccess.jar:/home/dimitry/.sdkman/candidates/java/8.0.222-zulu/jre/lib/ext/localedata.jar:/home/dimitry/.sdkman/candidates/java/8.0.222-zulu/jre/lib/ext/nashorn.jar:/home/dimitry/.sdkman/candidates/java/8.0.222-zulu/jre/lib/ext/openjsse.jar:/home/dimitry/.sdkman/candidates/java/8.0.222-zulu/jre/lib/ext/sunec.jar:/home/dimitry/.sdkman/candidates/java/8.0.222-zulu/jre/lib/ext/sunjce_provider.jar:/home/dimitry/.sdkman/candidates/java/8.0.222-zulu/jre/lib/ext/sunpkcs11.jar:/home/dimitry/.sdkman/candidates/java/8.0.222-zulu/jre/lib/ext/zipfs.jar:/home/dimitry/.sdkman/candidates/java/8.0.222-zulu/jre/lib/jce.jar:/home/dimitry/.sdkman/candidates/java/8.0.222-zulu/jre/lib/jfr.jar:/home/dimitry/.sdkman/candidates/java/8.0.222-zulu/jre/lib/jsse.jar:/home/dimitry/.sdkman/candidates/java/8.0.222-zulu/jre/lib/management-agent.jar:/home/dimitry/.sdkman/candidates/java/8.0.222-zulu/jre/lib/resources.jar:/home/dimitry/.sdkman/candidates/java/8.0.222-zulu/jre/lib/rt.jar:/home/dimitry/temp/Darcula/out/production/demo:/home/dimitry/temp/Darcula/lib/iconloader.jar:/home/dimitry/temp/Darcula/lib/demo/AnimatedTransitions.jar:/home/dimitry/temp/Darcula/lib/demo/AppFramework.jar:/home/dimitry/temp/Darcula/lib/demo/swing-worker.jar:/home/dimitry/temp/Darcula/lib/demo/swingx.jar:/home/dimitry/temp/Darcula/lib/demo/TimingFramework.jar:/home/dimitry/temp/Darcula/out/production/Darcula:/home/dimitry/temp/Darcula/lib/annotations.jar SwingSet2
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 javax.swing.UIManager.initializeDefaultLAF(UIManager.java:1349)
	at javax.swing.UIManager.initialize(UIManager.java:1459)
	at javax.swing.UIManager.maybeInitialize(UIManager.java:1426)
	at javax.swing.UIManager.getUI(UIManager.java:1006)
	at javax.swing.JPanel.updateUI(JPanel.java:126)
	at javax.swing.JPanel.<init>(JPanel.java:86)
	at javax.swing.JPanel.<init>(JPanel.java:109)
	at javax.swing.JPanel.<init>(JPanel.java:117)
	at SwingSet2.<init>(SwingSet2.java:182)
	at SwingSet2.main(SwingSet2.java:245)
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)
	... 14 more

Process finished with exit code 1

It turns out that com.bulenkov.iconloader.util.UIUtil.getLabelFont() returns null and this is not expected.

Could you please give any advice on how to handle this problem?

[muehmar]

In my case, I set the look and feel programmatically in my project and had the same issue. I didn't figure out whats actually the problem, but the following workaround works for me: First I set one of the installed look and feel and then set the darcula look and feel.

[dpolivaev]

Fixed in #57