Error Java.lang.numberformatexception Null

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Java Lang Numberformatexception Null At Java Lang Integer Parseint

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Java.lang.numberformatexception For Input String Null In Java

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Number Format Exception In Java Example

whats wrong?(NumberFormatException: null) up vote 2 down vote favorite 1 import java.io.*; class AccountInfo { private String lastName; private String firstName; private int age; private float accountBalance; protected AccountInfo(final String last,final String first,final int ag,final float balance) throws IOException{ lastName=last; firstName=first; age=ag; accountBalance=balance; } public void saveState(final OutputStream stream){try{ OutputStreamWriter osw=new OutputStreamWriter(stream); BufferedWriter bw=new BufferedWriter(osw); bw.write(lastName); bw.newLine(); bw.write(firstName); bw.write(age); bw.write(Float.toString(accountBalance)); bw.close();} catch(IOException e){ System.out.println (e); } } public void restoreState(final InputStream stream)throws IOException{ try{ InputStreamReader isr=new InputStreamReader(stream); BufferedReader br=new BufferedReader(isr); lastName=br.readLine(); firstName=br.readLine(); age=Integer.parseInt(br.readLine()); accountBalance=Float.parseFloat(br.readLine()); br.close();} catch(IOException e){ System.out.println (e); } } } class accounto{ public static void main (String[] args) {try{ AccountInfo obj=new AccountInfo("chaturvedi","aayush",18,18); FileInputStream fis=new FileInputStream("Account.txt"); FileOutputStream fos=new FileOutputStream("Account,txt"); obj.saveState(fos); obj.restoreState(fis);} catch(IOException e){ System.out.println (e); } } } im getting the following erro

12:39:06,591 ERROR [btpool0-8 ] fisheye.app TotalityFilter-logExceptionDetails - Exception "null" java.lang.numberformatexception null at java.lang.integer.parseint(unknown source) (java.lang.NumberFormatException) while processing "/changelog-ajax/Storm/trunk/release.xml" (Referer:"null") java.lang.NumberFormatException: null

Java.lang.numberformatexception For Input String In Java

at java.lang.Integer.parseInt(Integer.java:443) at java.lang.Integer.valueOf(Integer.java:570) at com.cenqua.fisheye.web.ChangelogAjaxServlet.handleRequest(ChangelogAjaxServlet.java:118) at com.cenqua.fisheye.web.BaseAction.processRequest(BaseAction.java:251) at com.cenqua.fisheye.web.ActionDispatcherServlet.doIt(ActionDispatcherServlet.java:238) at numberformatexception in java com.cenqua.fisheye.web.ActionDispatcherServlet.doGet(ActionDispatcherServlet.java:69) at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1272) Cause Googlebot is attempting to fetch a URL it http://stackoverflow.com/questions/11600699/whats-wrongnumberformatexception-null has parsed out of a FishEye webpage, and making a hash of it (the URL is only designed to be accessed as part of an AJAX request via JavaScript) butit is used in a way https://confluence.atlassian.com/fishkb/error-exception-null-java-lang-numberformatexception-while-processing-file-path-referer-null-312738132.html it was never designed to be called. Resolution Set up arobots.txtfileon the server, and disallow that particular URL prefix: User-agent: Googlebot Disallow: /changelog-ajax/ Was this helpful? Yes No Thanks for your feedback! Why was this unhelpful? It wasn't accurate It wasn't clear It wasn't relevant Submit feedback Cancel Have a question about this article? See questions about this article Powered by Confluence and Scroll Viewport Atlassian Support Ask the community Provide product feedback Contact technical support Atlassian Privacy Policy Terms of use Security Copyright © 2016 Atlassian Except where otherwise noted, content in this space is licensed under a Creative Commons Attribution 2.5 Australia License.

This Site Careers Other all forums Forum: JSP java.lang.NumberFormatException: null laura xhaferaj Greenhorn Posts: 19 posted 3 years ago hello! i'm trying to run a jsp code but i get the following error: java.lang.NumberFormatException: null java.lang.Integer.parseInt(Unknown Source) https://coderanch.com/t/614406/JSP/java/java-lang-NumberFormatException-null the code is this: <% String id = request.getParameter("id"); int ID = Integer.parseInt(id); String connectionURL = "jdbc:mysql://localhost/parking"; Connection connection = null; Statement statement = null; Statement stm =null; //System.out.println(ID); try { Class.forName("com.mysql.jdbc.Driver").newInstance(); connection = DriverManager.getConnection(connectionURL, "root", ""); statement = connection.createStatement(); statement.executeUpdate("SELECT * INTO rruget_mbyllur FROM rruget WHERE ID= '"+ID+"'"); stm.executeUpdate("DELETE FROM rruget WHERE ID='" + ID + "'"); response.sendRedirect("/Parkimi/admin.jsp"); } catch (Exception e) { } %> what may be the numberformatexception null problem? Bear Bibeault Author and ninkuma Marshal Posts: 65265 95 I like... posted 3 years ago Problem #1: Having Java code in your JSP. That's an obsolete and outdated practice from over a dozen years ago. Why are you still doing it? Why is this code not in a servlet? Problem #2: id is likely null. (Problem #3 is creating connections in the web layer rather than the java lang numberformatexception model -- but that's another topic.) [Asking smart questions] [About Bear] [Books by Bear] laura xhaferaj Greenhorn Posts: 19 posted 3 years ago but for what reason is it null because it has a value in database Bear Bibeault Author and ninkuma Marshal Posts: 65265 95 I like... posted 3 years ago id has nothing at all to do with the database. You are obtaining it from a request parameter. [Asking smart questions] [About Bear] [Books by Bear] laura xhaferaj Greenhorn Posts: 19 posted 3 years ago i mean i am gettin it from here : Mbyll and rs.getInt(1) is getting a value from database Bear Bibeault Author and ninkuma Marshal Posts: 65265 95 I like... posted 3 years ago How are you sure? Did you view the generated HTML? Is the request parameter correct as viewed in the URL in the browser after you click the link? Don't make us guess what you've already done -- tell us. Also you never answered my questions about putting the code in a JSP. Is this an old legacy page, or new code? [Asking smart questions] [About Bear] [Books by Bear] laura xhaferaj Greenhorn Posts: 19 posted 3 years ago http://localhost:8080/Parkimi/cancelRruge.jsp?id=1