JUNG errors, on noes!

Pierre-Arronax:github-recruitment farmckon$ javac -cp `echo lib/*jar | tr ' ' :` Ranker.javaerror: error reading lib/collections-generic-4.01.jar; cannot read zip fileRanker.java:1: package edu.uci.ics.jung.algorithms.scoring does not existimport edu.uci.ics.jung.algorithms.scoring.*;^Ranker.java:2: package edu.uci.ics.jung.algorithms.shortestpath does not exist
import edu.uci.ics.jung.algorithms.shortestpath.*;
^
Ranker.java:3: package edu.uci.ics.jung.graph does not exist
import edu.uci.ics.jung.graph.*;
^
Ranker.java:4: package edu.uci.ics.jung.graph.util does not exist
import edu.uci.ics.jung.graph.util.*;
^
Ranker.java:5: package edu.uci.ics.jung.algorithms.cluster does not exist
import edu.uci.ics.jung.algorithms.cluster.*;
^
Ranker.java:12: cannot find symbol
symbol  : class Graph
location: class Ranker
        Graph<String, Integer> g = new DirectedSparseGraph<String, Integer> ();
        ^
Ranker.java:12: cannot find symbol
symbol  : class DirectedSparseGraph
location: class Ranker
        Graph<String, Integer> g = new DirectedSparseGraph<String, Integer> ();
                                       ^
Ranker.java:19: cannot find symbol
symbol  : variable EdgeType
location: class Ranker
                g.addEdge(count,user,(String)fuser,EdgeType.DIRECTED);
                                                   ^
Ranker.java:28: cannot find symbol
symbol  : class BetweennessCentrality
location: class Ranker
        BetweennessCentrality<String, Integer> pr = new BetweennessCentrality<String, Integer>(g);
        ^
Ranker.java:28: cannot find symbol
symbol  : class BetweennessCentrality
location: class Ranker
        BetweennessCentrality<String, Integer> pr = new BetweennessCentrality<String, Integer>(g);
                                                        ^
11 errors