String[] id = request.getParameterValues("deletechkbox");
        int count=0;
        Connection conn = null;
        try {
            Class.forName("com.mysql.jdbc.Driver");
            // Step 2: Define Connection URL
            String connURL = "jdbc:mysql://localhost/medicloud?user=root&password=root";
            // Step 3: Establish connection to URL
            conn = DriverManager.getConnection(connURL);

            if (id != null)
            {

        for(int i=0; i<id.length; i++){

        String sqlStr = "DELETE from exercise1 where id=?";
        PreparedStatement pstmt = conn.prepareStatement(sqlStr);
        pstmt.setInt(3, Integer.parseInt(id[i]));
        int rec = pstmt.executeUpdate();
        if (rec==1)
            count++;
        }
        }