Hello. Please review a small fix for jdk 9. The problem is in the Util.waitForIdle(Robot) which does not take into account that robot can be null. Bug: https://bugs.openjdk.java.net/browse/JDK-8068275 Webrev can be found at: http://cr.openjdk.java.net/~serb/8068275/webrev.01 -- Best regards, Sergey.