Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

via robocode by saracarolina84
, 1 year ago
This exception has no message.
java.lang.NullPointerException: 	at net.sf.robocode.host.io.RobotFileSystemManager.getDataFile(RobotFileSystemManager.java:139)	at net.sf.robocode.host.proxies.AdvancedRobotProxy$1.run(AdvancedRobotProxy.java:213)	at net.sf.robocode.host.proxies.AdvancedRobotProxy$1.run(AdvancedRobotProxy.java:212)	at java.security.AccessController.doPrivileged(Native Method)	at net.sf.robocode.host.proxies.AdvancedRobotProxy.getDataFile(AdvancedRobotProxy.java:211)	at robocode.AdvancedRobot.getDataFile(AdvancedRobot.java:723)	at undefined.RobotPractica5.onWin(RobotPractica5.java:345)	at robocode.WinEvent.dispatch(WinEvent.java:68)	at robocode.Event$HiddenEventHelper.dispatch(Event.java:249)	at net.sf.robocode.security.HiddenAccess.dispatch(HiddenAccess.java:195)	at net.sf.robocode.host.events.EventManager.dispatch(EventManager.java:486)