安卓队列里的值是否无法进行比较？

                            if (Integer.parseInt((String)receives1.get(s1)) == 0) { //
                                operatestate1.setText("正常");
                            } 
                            if( Integer.parseInt((String)receives1.get(s1)) == 1) {
                                operatestate1.setText("污点");
                            } 
                            if (Integer.parseInt((String)receives1.get(s1)) == 2) {
                                operatestate1.setText("全亮");
                            } 
                            if (Integer.parseInt((String)receives1.get(s1)) == 3) {
                                operatestate1.setText("全暗");
                            }
                            s1++;

                            为什么老报错呢？

receives1.get(s1)
调试下这里s1是什么