Posted December 22, 2017 java.lang.NoClassDefFoundError: javafx/application/Application at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:763) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader$1.run(URLClassLoader.java:368) at java.net.URLClassLoader$1.run(URLClassLoader.java:362) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:361) at com.sun.jnlp.JNLPClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at com.sun.jnlp.JNLPClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at com.sun.javaws.Launcher.doLaunchApp(Unknown Source) at com.sun.javaws.Launcher.run(Unknown Source) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.ClassNotFoundException: javafx.application.Application at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at com.sun.jnlp.JNLPClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at com.sun.jnlp.JNLPClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 16 more Windows 10 machine with latest version of java 64bit. Share this post Link to post Share on other sites
Posted December 26, 2017 Try using the Java removal tool - https://www.java.com/en/download/uninstalltool.jsp Then reinstall only the Java 64bit. 1 Share this post Link to post Share on other sites