Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");

Connection conn = null;
Statement statement = null;
ResultSet rs = null;
try{
    Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
    String connectionUrl = "jdbc:sqlserver://<server_name>:1433;databaseName=<db_name>;integratedSecurity=true;user=<user>;password=<***>";
    conn = DriverManager.getConnection(connectionUrl);
    statement = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
    rs = statement.executeQuery(query1 + itemTag + query2);
    while(rs.next()){
        String number = rs.getString(1);
        tableItem.setText(7, number);
        break;
    }
}catch (SQLException e) {
    e.printStackTrace();
} catch (ClassNotFoundException e) {
    e.printStackTrace();
}finally {
    if (rs != null) try { rs.close(); } catch(Exception e) {}
    if (statement != null) try { statement.close(); } catch(Exception e) {}
    if (conn != null) try { conn.close(); } catch(Exception e) {}
}