I have this method in my superclass, which extends activity:
protected boolean isStopAvailable(BusStop stop) {
if (stop == null) {
stop = new BusStop();
} else if (stop.getName().length() > 0) {
return true;
} else {
return false;
}
return false;
}
I call it in my subclass isStopAvailable(object); How is it even possible to get a null pointer exception while using a method from the object after I've initiated the object?
If getName() returns null, you will get a NPE. You are trying to do a length function on a null object, hence this exception. You should add another else if check:
...
else if (stop.getName() == null) {
// do something
}
Hope this helps.
I would bet that the name field in stop is null. Your first check is to see if the object is null, not the fields inside of it. Thus, if stop.getName() returns null, you get an NPE when attempting to invoke the length
I suggest that the NPE is thrown in this line: else if (stop.getName().length() > 0)
Thats possible because you've checked if the object BusStop is null but you didn't checked if stop.getName() could be null.
Do something like that:
else if (stop.getName() == null) {
// set stop.setName()
}
Hope this helped, Have Fun!
