• 0

[Java] convert String to Int


Question

13 answers to this question

Recommended Posts

  • 0

the error i got is as below:

HTTP Status 500 -

--------------------------------------------------------------------------------

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: null

at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:254)

at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)

at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)

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:256)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)

at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)

at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)

at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2417)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)

at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)

at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)

at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)

at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:193)

at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:309)

at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:387)

at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:673)

at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:615)

at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:786)

at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:666)

at java.lang.Thread.run(Thread.java:534)

root cause

java.lang.NumberFormatException: null

at java.lang.Integer.parseInt(Integer.java:436)

at java.lang.Integer.parseInt(Integer.java:518)

at org.apache.jsp.rpt_traffic_jsp._jspService(rpt_traffic_jsp.java:637)

at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:210)

at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)

at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)

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:256)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)

at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)

at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)

at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2417)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)

at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)

at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)

at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)

at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:193)

at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:309)

at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:387)

at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:673)

at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:615)

at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:786)

at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:666)

at java.lang.Thread.run(Thread.java:534)

*p/s: the m_sSortType i declare as string

--------------------------------------------------------------------------------

Apache Tomcat/4.1.29

  • 0
  cyclone9 said:

is there other method to c onvert string to integer?

it doesnt seems working...

i means some string cant be converted to integer which trigger this error

I'd suggest debugging it. Either by using a debugger or by using simple System.out.println(m_sSortType). You need to see if m_sSortType contains an Integer or not. Your code for converting String to Integer is correct, but it seems there's a bug, which means m_sSortType doesn't contain an Integer in String format when you are calling the Integer.parseInt() method.

I don't think there is any other in-built method for converting a String to Integer. You will have to make one yourself if you are so sure that Java is at fault. :rolleyes:

This topic is now closed to further replies.
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Posts

    • Both a game adaptation and it's on Amazon I'll set my hopes low
    • You shut your mouth you young fart, that was just a few years ago, lol.
    • Good effort, but unfortunately not very useful in the real world, since it doesn't support UEFI - which is a major drawback. More than that, most PCs these days have Secure Boot enabled by default, so unless you're tech savvy, the average joe is not going to disable Secure Boot - which means automated Windows > Linux migration programs like this will not work. And if you're tech savvy enough to know how to disable Secure Boot, then you're tech savvy enough to just flash a USB drive and install Linux the usual way - after all, the actual installation process is just point-and-click. So I don't see a use case here to be honest, especially considering the lack of UEFI support - especially when you consider that more and more Linux distros are completely dropping BIOS support (eg Fedora dropped it back in 2022). So this program is a bit too late to the party.
    • I agree with open rights group that the age check companies should be regulated but action does need to be taken imo, they may be called irresponsible parents but the fact is that many don't know how to set up blocks. Why should kids suffer because their parents don't know something? I think the UK has always been a bit like this. We don't say healthcare is your responsibility, we tax everyone and make people register with the NHS. We also don't expect everyone to brush their teeth to maintain dental health, we just put fluoride in their water assuming people aren't brushing enough, because some probably aren't or aren't doing it properly. In general, this way of doing things works.
  • Recent Achievements

    • One Month Later
      Falcon.ai earned a badge
      One Month Later
    • Week One Done
      Falcon.ai earned a badge
      Week One Done
    • Dedicated
      EYEREX earned a badge
      Dedicated
    • First Post
      Electronic Person earned a badge
      First Post
    • Week One Done
      CyberCeps666 earned a badge
      Week One Done
  • Popular Contributors

    1. 1
      +primortal
      630
    2. 2
      ATLien_0
      237
    3. 3
      Xenon
      165
    4. 4
      neufuse
      142
    5. 5
      +FloatingFatMan
      123
  • Tell a friend

    Love Neowin? Tell a friend!