Databases
StackOverflow2013
Postsdbo
PONumber Format Exception in Java Servlet
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PONumber Format Exception in Java Servlet
    primarykey
    data
    text
    <p>I have made a simple servlet in Eclipse running on Tomcat server.</p> <p>I am running a simple java application which passes a string <code>message=20</code> to the servlet. The servlet gets the data. I am using </p> <pre><code>String name= request.getParameter("message"); </code></pre> <p>to get the passed string. When I return the name value back to the application, I am able to get it back. But when I try to process the string name:</p> <pre><code>int val=Integer.parseInt(name); </code></pre> <p>I get <code>NumberFormatException</code>. I cannot figure out what the problem is. I have been able to get the value of name variable back from the servlet, but why can't I use it?</p> <p>The Code I am using is as follows:</p> <p><strong>CLIENT SIDE CODE</strong></p> <pre><code>URL url = new URL("http://localhost:8080/DemoServer/demoservelet"); URLConnection conn = url.openConnection(); conn.setDoOutput(true); BufferedWriter out = new BufferedWriter( new OutputStreamWriter( conn.getOutputStream() ) ); out.write("message=20"); </code></pre> <p><strong>SERVLET CODE</strong></p> <pre><code>String username = request.getParameter("message").toString(); int val=Integer.parseInt(username); //get error msg on this line response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println("Passed val :"+ username+username.length()); } </code></pre> <p>I am getting error on the conversion. One more thing on return I am getting a length value of 4 which also does not make any sense?</p> <p>Please help me regarding this. </p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USKazekage Gaara
    1. USuser1388142
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. PONumber Format Exception in Java Servlet
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PONumber Format Exception in Java Servlet
      1. This table or related slice is empty.
      1. VTDownMod
    3. VO
      singulars
      1. PONumber Format Exception in Java Servlet
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    1. COCan you debug to see exactly what the value of `name` is on that line?
      singulars
      1. PONumber Format Exception in Java Servlet
      1. USDan W
    2. COAnd how did you pass the name and value?
      singulars
      1. PONumber Format Exception in Java Servlet
      1. USPaul Vargas
    3. COWhat do you see if you print the value of name before you try to parse it? You could enclose the printed value in quotes/brackets to make sure it doesn't contain whitespace. System.out.println("[" + name + "]");
      singulars
      1. PONumber Format Exception in Java Servlet
      1. USjahroy
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload