Java/Clojure interop can't realize lazy sequence in Java

I am passing a map generated in Clojure into Java ultimately destined for a JTable. The use of the map function creates a lazy sequence that even with doall, into {} is not realized. Clojure:

(defn test-lz-seq []
  (let [myvec [[1 2  nil][3 4 nil][ 5 6 nil][ 7  8 nil]]
        myvec2 (doall (map #(if (nil? (nth % 2)) (assoc % 2 "NA")) myvec))
        colnames ["VarA" "VarB" "VarC"] ]
    (into {} (java.util.HashMap.
            {":colnames" colnames
             ":data" myvec2} ))))

(println (test-lz-seq))

At the repl looks good:

lnrocks.core>  {:data ([1 2 NA] [3 4 NA] [5 6 NA] [7 8 NA]), :colnames [VarA VarB VarC]}

Java code:

import clojure.java.api.Clojure;
import clojure.lang.IFn;
import clojure.lang.PersistentVector;
.
.
.
public class DialogMainFrame extends JFrame {

    private PersistentVector colnames;
    private PersistentVector data;   
  private  IFn require = Clojure.var("clojure.core", "require");
.
.
.
    System.out.println("==========test code===========");
    System.out.println("");

       IFn testLzSeq = Clojure.var("lnrocks.core", "test-lz-seq");   
      Map<String, PersistentVector> hm = (Map)testLzSeq.invoke();
      System.out.println(hm.get(":data"));
      System.out.println(hm.get(":colnames"));

    System.out.println("");
     System.out.println("===================================");

At the console:

==========test code===========

clojure.lang.LazySeq@e1781
["VarA" "VarB" "VarC"]

===================================

How do I realize the vector in Java?