Baje la libreria de forms y me desaparece el error, pero aparece esto ahora
Cita: Exception in thread "main" java.lang.NoClassDefFoundError: com/jgoodies/common/base/SystemUtils
at com.jgoodies.forms.util.LayoutStyle.initialLayoutS tyle(LayoutStyle.java:73)
at com.jgoodies.forms.util.LayoutStyle.<clinit>(Layou tStyle.java:60)
at com.jgoodies.forms.factories.Borders.<clinit>(Bord ers.java:134)
at java.initComponents(java.java:37)
at java.<init>(java.java:17)
at Menu.main(Menu.java:12)
Caused by: java.lang.ClassNotFoundException: com.jgoodies.common.base.SystemUtils
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 6 more