Please help, 2D Array of Vectors and Incompatible types :(

Question

I have a 2D array of vectors called nodeLocations but when I try and access the vector inside I get a compile error.
My code is something like this:
nodeLocations[j].addElement(noArc)
My editor picks up that its a Vector and shows me addElement as an acceptable entry to put after the "." yet the compiler says:
"addElement(java.lang.Object) in java.util.Vector cannot be applied to (int)"
Can someone please help?
Thank you in advance.
also a related problem:
I get inconvertible types (says int required) when I try and get an element from a vector stored in a 2D Array. I know that it comes out as an object and so should be cast but it does not seem to work. My code is as follows:
else if (((int)(nodeLocations[nodeNumber][adjNodeNumber].elementAt(0))) != distance)
I would appreciate any help anyone can give.
Similar errors to the above two happen when
I try a push with a Stack in a vector.
I try to get something out of the stack inside the vector.

Answer 1

The Vector class's addElement() method requires an Object parameter. It appears that you're trying to add an int to the Vector. You'll need to create an Integer object and place that into the vector (see sample below) or use the pre-release version of JDK 1.5 which provides autoboxing capabilities.
int z = 5;
Integer x = new Integer(z);
nodeLocations[j].addElement(x);