java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sun.javaws.Launcher.executeApplication(Launcher.java:1468)
at com.sun.javaws.Launcher.executeMainClass(Launcher.java:1414)
at com.sun.javaws.Launcher.doLaunchApp(Launcher.java:1225)
at com.sun.javaws.Launcher.run(Launcher.java:114)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ExceptionInInitializerError
at org.lwjgl.Sys.createImplementation(Sys.java:111)
at org.lwjgl.Sys.<clinit>(Sys.java:100)
at org.lwjgl.opengl.Display.<clinit>(Display.java:128)
at org.newdawn.slick.AppGameContainer$1.run(AppGameContainer.java:39)
at java.security.AccessController.doPrivileged(Native Method)
at org.newdawn.slick.AppGameContainer.<clinit>(AppGameContainer.java:36)
at SlickGame.main(SlickGame.java:628)
... 9 more
Caused by: java.security.AccessControlException: access denied (java.util.PropertyPermission org.lwjgl.util.Debug read)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323)
at java.security.AccessController.checkPermission(AccessController.java:546)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at java.lang.SecurityManager.checkPropertyAccess(SecurityManager.java:1285)
at java.lang.System.getProperty(System.java:650)
at java.lang.Boolean.getBoolean(Boolean.java:221)
at org.lwjgl.LWJGLUtil$4.run(LWJGLUtil.java:451)
at java.security.AccessController.doPrivileged(Native Method)
at org.lwjgl.LWJGLUtil.getPrivilegedBoolean(LWJGLUtil.java:449)
at org.lwjgl.LWJGLUtil.<clinit>(LWJGLUtil.java:268)
... 16 more
Edit: Had to delete the slick files that Eclipse put in my jar (the imports).