Updating classpath container java lang nullpointerexception datingonlinebelgium
WTPProject Configurator.configure Classpath(WTPProject Configurator.java:107) at org.eclipse.m2internal. Default Classpath Manager Delegate.populate Classpath(Default Classpath Manager Delegate.java:61) at org.eclipse.m2internal.
Build Path Classpath(Build Path Manager.java:253) at org.eclipse.m2internal.
Let's illustrate with the simple example (above) first.
We start by looking at the line that the stack trace has told us is where the NPE happened: In Java all the variables you declare are actually "references" to the objects (or primitives) and not the objects themselves.
Build Path Classpath(Build Path Manager.java:371) at org.eclipse.m2internal.
Build Path Manager.update Classpath(Build Path Manager.java:191) at org.eclipse.m2internal.
Virtual Underlying Files(Virtual File.java:104) at org.common.componentcore.internal.resources. Virtual Underlying Resources(Virtual File.java:93) at org.common.componentcore.internal.resources. Virtual Resource.exists(Virtual Resource.java:88) at org.common.internal. Manifest Non Binary Component Manifest(Manifest Utilities.java:124) at org.common.internal.
Manifest Manifest(Manifest Utilities.java:81) at org.common.internal. Manifest Manifest Classpath(Manifest Utilities.java:147) at org.j2ee.componentcore. J2EEModule Virtual Manifest Classpath(J2EEModule Virtual Component.java:248) at org.j2ee.componentcore.
The short answer is to apply logical inference to the evidence provided by the stack trace, the source code and the relevant API documentation.
I'm running the latest Spring Tool Suite edition of Eclipse, and I've attempting to import a collection of existing Maven projects.
Whenever I do so, Eclipse throws a Null Pointer Exception, but no stack trace is available from the Error Log view.
This question’s answers are a collaborative effort. because it's a programmer error and the programmer will need that information for debugging purposes.
If you see something that can be improved, just edit the answer to improve it! Alternatively, there may be cases where the purpose of the method is not solely to operate on the passed in object, and therefore a null parameter may be acceptable.In this case, you would need to check for a null parameter and behave differently. For example, s are exceptions that occur when you try to use a reference that points to no location in memory (null) as though it were referencing an object.