Some RoaringBitmap issue

Basic.java

import org.roaringbitmap.*;
import java.io.*;
import java.util.*;

public class Basic {

  public static void main(String[] args) throws IOException {

        DataInputStream in;
        in = new DataInputStream(new FileInputStream(args[0]));
        RoaringBitmap rr1 = new RoaringBitmap();
        rr1.deserialize(in);
        long cardinality1 = rr1.getLongCardinality();
        System.out.println("cardinality1 : "+cardinality1);

        RoaringBitmap rr2 = new RoaringBitmap();
        in = new DataInputStream(new FileInputStream(args[1]));
        rr2.deserialize(in);
        long cardinality2 = rr2.getLongCardinality();
        System.out.println("cardinality2 : "+cardinality2);

        final long count[] = new long[2];
        rr1.forEach(new IntConsumer() {
            @Override
            public void accept(int value) {
                    count[0] ++;
            }
        });
        rr2.forEach(new IntConsumer() {
            @Override
            public void accept(int value) {
                    count[1] ++;
            }
        });
        System.out.println("cardinality1 (foreach): "+count[0]);
        System.out.println("cardinality2 (foreach): "+count[1]);
        System.out.println("rr1 : "+rr1.first()+" "+rr1.last());
        System.out.println("rr2 : "+rr2.first()+" "+rr2.last());

        RoaringBitmap rrand = RoaringBitmap.and(rr1,rr2);
        RoaringBitmap rror = RoaringBitmap.or(rr1,rr2);
        RoaringBitmap rrxor = RoaringBitmap.xor(rr1,rr2);
        RoaringBitmap rrandnot = RoaringBitmap.andNot(rr1,rr2);
        System.out.println("rrandnot : "+rrandnot.first()+" "+rrandnot.last());

        System.out.println("cardinality and : "+rrand.getLongCardinality());
        System.out.println("cardinality or : "+rror.getLongCardinality());
        System.out.println("cardinality xor : "+rrxor.getLongCardinality());
        System.out.println("cardinality andnot : "+rrandnot.getLongCardinality());
  }