Arrays to Vectors

[DMAN3021]

Hello,

I have a Vector of int[]. Now I want to take one of these int[] and put it into a variable. Heres the code I have so far:

int[] CurNode = new int[8];

CurNode = Tree.elementAt(i);

Tree is a Vector Containing 8 arrays of integer, all with 8 elements in them. I want to take one of the elements, and put it in CurNode. I get the following error:

AITree.java:52: incompatible types
found: java.lang.Object
required: int[]
        CurNode = Tree.elementAt(i);
                                ^

Thanks for your help,

Dan...

 

[sedj]

Vectors, ArrayLists and related lists all hold Object types. You must cast your Objects to their appropriate type before usuage when extracting from a Vector.

An int array (int[]) is regarded by Java as an object, so you are able to cast straight from Object to int[] as below.

		int[] arr = new int[] {1,2,3,4};
		Vector v = new Vector();
		v.addElement(arr);

		int[] arr2 = (int[])v.elementAt(0);
		
		System.err.println(arr2[0]);