我需要从数据库中的循环中获取值以进行下一次计算

Question

这个结果只给我11,8,9。我想总和成为28.然后将结果用于下一个我的计算11/28 = 0,39和8/28 = 0,28和9/28 = 0,32。然后显示最终结果。帮帮我

    try{


      Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/hitung1","root","");
      String sql = ("select angka1,angka2 from tabel1 ");
      PreparedStatement ps = conn.prepareStatement(sql);
      ResultSet rs = ps.executeQuery();

      while(rs.next()){
          double a=rs.getInt("angka1");
          double b=rs.getInt("angka2");
          double d=b+a;

          System.out.println("" +d);

      } }
   catch(Exception e){}
    e