Description of the bug: java.lang.NullPointerException: Cannot invoke "com.intellij.openapi.vfs.VirtualFile.getPath ()" because "file" is null at com.google.idea ...

When calling a WebService from within the EJB-Container it produces a NullPointerException. Here is the code, generated with Netbeans 6.9.1 by means of "New -> Web Service Client -> WSDL URL" and " ...

ERROR: NullPointerException encountered while trying to adding String to Deque that is set to null. java.lang.NullPointerException INFO: Successful at adding String to Deque that is set to null ...

Ever come across the null pointer exception in Java? We explain what this error message means, why it happens, and how to avoid the billion-dollar mistake.