为什么我的代码在for循环后不执行？

Question

 while(counter != this.data.size()) {


      for(int i=0; i <= p.data.size(); i++) {
          double coefficient = first.getData().getCoefficient() * sec.getData().getCoefficient();
          int degree = first.getData().getDegree() + sec.getData().getDegree();
          Term current = new Term(coefficient,degree);


          if(ans.data.isEmpty()) {
              ans.data.addFirst(current);
          }
          else {
        boolean found = false;
        DNode<Term > tmp = ans.data.getFirst();

        while(found != true) {
            if(tmp.getData() == null) {
                ans.data.addLast(current);
                found = true;
            }
            else if(current.getDegree() > tmp.getData().getDegree()) {
                    ans.data.addBefore(current, tmp);
                    found = true;
                }
                else if(current.getDegree() == tmp.getData().getDegree()) {

                    double co = current.getCoefficient() * tmp.getData().getCoefficient();
                    int deg = current.getDegree() + tmp.getData().getDegree();
                    tmp.getData().setCoefficient(co);
                    tmp.getData().setDegree(deg);
                    found = true;
                }
             System.out.println("DID I GET HERE"); 
                tmp = tmp.getNext();
            }
         System.out.println("DID I GET HERE2"); 
        }
          System.out.println("DID I GET HERE3"); 
          sec = sec.getNext();
    }


      System.out.println("DID I GET HERE4"); 
          first = first.getNext();
          counter++;

      }

我的代码甚至没有到达我到达这里的原因4，有人可以告诉我为什么吗？ 我遇到了很多困难，因为该项目定于今天晚些时候发布，因此代码假定要乘以2个多项式