Android集合排序

  Collections.sort(dataBeans, new Comparator<DataBean>() {
              @Override
              public int compare(DataBean dataBean, DataBean t1) {
//            默认降序        
//            int i = dataBean.getRj() - t1.getRj();
//            升序  
              int i = t1.getZfrc() - dataBean.getZfrc();
              return i;
              }
          });