Prim's Algorithm...Help me!

Question

Graph Theory Project:
1. Implement Prim's algorithm in Java using the data structures and the
pseudo-code from handout. Your output should produce a set of vertices and
edges of a spanning tree of the example.
Prim's Algorithm
Problem: Determine a minimum spanning tree.
Inputs: integer n>=2, and a connected, weighted, undirected graph containing
n vertices. The graph is represented by a two-dimensional array W, which has
both its row and columns indexed from 1 to n, where W[ i ] [ j ] is the
weight on the edge between the ith and the jth vertex.
Output: set of edges F in a minimum spanning tree for the graph.
public static set_of_edges prim( int n, number [ ] [ ] W)
index i, vnear;
number min;
edge e;
set_of_edges F;
index [ ] nearest = new index [2 . . n];
number [ ] distance = new number [2 . . n];
F = null or empty value;
for ( i = 2; i <= n; i++) {
nearest [ i ] = 1; // For all vertices, initialize v1 to be the nearest
distance [ i ] = W[1] [ i ]; // vertex in Y and initialize the distance
//from Y to be
} //the weight on the edge to v1.
repeat (n - 1 times) {                           //Add all n-1 vertices to Y.
min = (infinity)
for (i = 2; i <= n; i++); //Check each vertex for
if (0 <= distance [ i ] < min) {              //being nearest to Y.
min = distance [ i ];
vnear = i;
e = edge connecting vertices indexed
by vnear and nearest [vnear];
add e to F;
distance[vnear] = -1; //Add vertex indexed by vnear
for ( i = 2; i <= n; i++) // to Y.
if (W[ i ] [vnear] < distance[ i ]) //For each vertex not in Y,
distance [ i ] = W[ i ] [vnear]; //update its distance from Y.
nearest[ i ] = vnear;
return F;
}

Answer 1

My level in intermediate in Java. Yes. I have been
told how to do output to produce a set of vertices
and edges of a spanning tree. I am not going to do
make applet graph only to show numbers.Ok, you're intermediate in Java, so you know the syntax and should be able to make a start.
When you run into problems with your code, post it here on the forum (using code tags: http://forum.java.sun.com/help.jspa?sec=formatting) and explain what it is you're having trouble with.
Good luck.