Re: NullPointer exception in ResultSet.getString()

    You appear to be using an older version of the driver.  If you get
the development version from jdbc.postgresql.org, do you have the same
problem?

Aaron

On Sun, 13 Oct 2002, gaganis wrote:
> Hello
>
> I am a new user of postrgresql and am accessing it through java(jsp).
>
> Trying to get a string from a result set I get a really weird
> NullPointer exception from the method
> org.postgresql.jdbc2.ResultSet.getString inside the jdbc driver.
>
> I am using postgresql 7.2.1 on linux 2.4.18
> allong with tomcat 4.0.4
> and sun's j2sdk1.4.0
> the driver is jdbc2
>
>
> here is my code that produces the prob
>
> String dsn =
> "jdbc:postgresql://localhost:5432/illigos?user=illigos&password=qwerty";
>     Connection conn = DriverManager.getConnection(dsn);
> .
> .
> .
> Statement st = conn.createStatement();
>
>         ResultSet rs = st.executeQuery("select * from FOITITIS where
> account='"+account+"';");
> .
> .
> .
> out.println("<tr><td><i>Onoma:</i></td><td>"+rs.getString("onoma")+"</td></tr>");
>
> this is my table description:
>
> illigos=> \d foititis
>                  Table "foititis"
>     Column   |         Type          | Modifiers
> ------------+-----------------------+-----------
>   account    | character varying(20) | not null
>   onoma      | character varying(40) |
>   epitheto   | character varying(40) |
>   ar_mitroou | character varying(10) |
>   examino    | character varying(20) |
> Primary key: foititis_pkey
> Triggers: RI_ConstraintTrigger_16590,
>            RI_ConstraintTrigger_16592
>
> follows the exception report:
>
> java.lang.NullPointerException
>          at org.postgresql.jdbc2.ResultSet.getString(ResultSet.java:168)
>          at org.postgresql.jdbc2.ResultSet.getString(ResultSet.java:553)
>          at org.apache.jsp.use$jsp._jspService(use$jsp.java:116)
>          at
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
>          at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
>          at
> org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:201)
>          at
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:381)
>          at
> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:473)
>          at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
>          at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
>          at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
>          at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
>          at
> org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
>          at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
>          at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
>          at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)
>          at
> org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
>          at
> org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
>          at
> org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
>          at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
>          at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
>          at
> org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
>          at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
>          at
> org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
>          at
> org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
>          at
> org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
>          at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
>          at
> org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
>          at
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
>          at
> org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
>          at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
>          at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
>          at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
>          at
> org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
>          at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
>          at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
>          at
> org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1027)
>          at
> org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125)
>          at java.lang.Thread.run(Thread.java:536)
>
>
>
>
> Thanks in advance
> Gaganis Giorgos
>
>
>
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