我可以在 java 中通过引用传递值吗

问：

代码片段

 public void parsequery()
 {

        ParseQuery<ParseObject> query = ParseQuery.getQuery("Products");
        query.whereEqualTo("StoreID", StoreID);
        query.findInBackground(new FindCallback<ParseObject>() {
        public void done(List<ParseObject> objects, ParseException e) {
                if (e == null) {

                    for(int j=0; j<array.size();j++){


                            ParseQuery<ParseObject> query1 = ParseQuery.getQuery("Products");
                            c = array.get(j);
                            Log.d("C",""+c);
                            query1.whereEqualTo("SubCategory", c);
                            query1.findInBackground(new FindCallback<ParseObject>() {
                                public void done(List<ParseObject> objects1, ParseException e) {
                                    if (e == null) {

                                        productList.clear();
                                        Log.d("Inner LOOP",""+objects1.size());
                                        for(int i=0; i<objects1.size();i++)
                                        {

                                            SingleRow temp1 = new SingleRow(objects1.get(i).getString("Name"),objects1.get(i).getString("Description"),objects1.get(i).getInt("Price"),objects1.get(i).getString("Store"),objects1.get(i).getObjectId(),1);
                                            productList.add(temp1);
                                        }
                                        productList  temp11 = new productList(productList);

                                        productList1.add(temp11);

                                    }else{
                                        Log.d("score", "Error: " + e.getMessage());
                                    }

                                }

                                }); 
                    }

                        Handler handler = new Handler();
                        handler.postDelayed(new Runnable() {
                            @Override
                            public void run() {

                                for(int k =0; k<array.size();k++){

                                Log.d("ProductList22",""+productList1.get(k).getProductList());
                                ArrayList<SingleRow>  temp2 =  productList1.get(k).getProductList();
                                SubcategorySinglerow temp = new SubcategorySinglerow(array.get(k),temp2);
                                categoryList.add(temp);
                                bool=true;  
                                }
                                myList.addHeaderView(header, null, false);
                                Log.d("categoryListAdapter", ""+categoryList);
                                listAdapter = new MyListAdapter(getActivity(), categoryList);
                                myList.setAdapter(listAdapter);
                                layout.setVisibility(View.GONE);
                                myList.setVisibility(View.VISIBLE);
                            }
                        }, 5000);

                } else {
                    Log.d("score", "Error: " + e.getMessage());
                }
    }
        });
 }

在这里我传递值 productList1.get（k）.getProductList（）;通过 productList 到 subcategorysinglerow 类，我在每次执行 for 循环后都会清除它，因为我需要向它添加新值。因此，它最终为类 productList 中的每个 productList1 传递 productList 的值，因为 java 是按值传递的。有没有办法在java中通过引用传递值。我该如何解决我的问题。