Hello. Please review the fix for jdk 9.The problem occurs when a JTabbedPane was repainted on EDT and the new tab was added in JApplet.init().
Bug: https://bugs.openjdk.java.net/browse/JDK-7056797Webrev can be found at: http://cr.openjdk.java.net/~serb/7056797/webrev.00/webrev
Diff: http://cr.openjdk.java.net/~serb/7056797/webrev.00/diff -- Best regards, Sergey.