• 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

    • Install a cheap Chinese clone of Adguard and then take support from call center to restore to Windows XP.
    • Does the job, although it can't run windows 11 officially. Currently running Windows 10 modded with ReviOS
    • Now, there is a dilemma - should I install some Russian software ( AdGuard ) to stop US ( Microsoft ) to spy on me ?
    • AdGuard is yet another app to block Windows Recall by Taras Buria Windows Recall is one of the most controversial Windows features. After the misfired launch and the scandal that followed, Microsoft implemented plenty of security measures and improvements. Still, some believe that Recall's reputation is tarnished forever. Besides, not everyone is comfortable with using the feature that takes screenshots of everything you do. As such, privacy-focused apps, browsers, and messengers are now offering blocks for Recall. AdGuard is the latest one to join them. AdGuard for Windows 7.21 introduces a new feature that lets you turn off Windows Recall. Although Recall is a strictly opt-in experience and it has several security measures, AdGuard developers believe that it is not enough. They argue that the feature idea itself is unsettling, PINs are easy to crack, and filters sometimes fail to engage. Here is what AdGuard says in the announcement post: If you use AdGuard on your PC, you can find the new "Disable Windows Recall" feature in Settings > Tracking Protection. As of now, Recall is only available on Copilot+ PCs. This month's non-security update expanded Recall to more users, making the feature available in the European Economic Area. And with Intel working on the next-generation desktop processors with improved NPUs, you can expect Recall and other recently introduced AI features to make their way to more users with desktop PCs. As an online publication, Neowin relies on ads for operating costs, and if you use an ad blocker, we'd appreciate being whitelisted. In addition, we have an ad-free subscription for $28 a year, which is another way to show support!
    • I'm sorry for sounding rude. I was just frustrated. I really want to get this right because I don't want to take any risk of potentially contaminating other hardware and risk losing precious files. Thanks again for the help. 
  • Recent Achievements

    • One Month Later
      Philsl earned a badge
      One Month Later
    • One Year In
      armandointerior640 earned a badge
      One Year In
    • One Month Later
      armandointerior640 earned a badge
      One Month Later
    • One Month Later
      Itbob513626 earned a badge
      One Month Later
    • Week One Done
      Itbob513626 earned a badge
      Week One Done
  • Popular Contributors

    1. 1
      +primortal
      615
    2. 2
      ATLien_0
      236
    3. 3
      Xenon
      156
    4. 4
      +FloatingFatMan
      122
    5. 5
      Michael Scrip
      116
  • Tell a friend

    Love Neowin? Tell a friend!