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POCan't convert String to Integer
 

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  1. POCan't convert String to Integer
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    <p>I am a beginner. I know this is basic. In my project I am using Java and MySQL workbench. I am reading a data from user by using select box which is coming from database by using ajax. The code for select box is mentioned below</p> <pre><code>&lt;% String a =request.getParameter("course"); if(a!=null) { ResultSet rs=s.selectsub(a); String Query="select * from subject where course_id='"+a+"'"; %&gt; &lt;select name="subject" id="subject"&gt; &lt;option&gt;Select Subject&lt;/option&gt; &lt;% while(rs.next()) { %&gt; &lt;option value="&lt;% out.println(rs.getString("subject_id")); %&gt;"&gt; &lt;% out.println(rs.getString("subject")); %&gt;&lt;/option&gt; &lt;% } %&gt; &lt;/select&gt; &lt;% } %&gt; </code></pre> <p>and the subject id is passed to another page using post method and trying this code</p> <pre><code> String subject=request.getParameter("subject"); int subjectid=Integer.parseInt(subject); </code></pre> <p>But the line Integer conversion is not working. Error is showing. The error is</p> <pre><code>org.apache.jasper.JasperException: An exception occurred processing JSP page /saveuser.jsp at line 29 26: String email=request.getParameter("email"); 27: String designation=request.getParameter("designation"); 28: String subject=request.getParameter("subject"); 29: int subjectid=Integer.parseInt(subject); 30: String institute=request.getParameter("institute"); 31: String inemail=request.getParameter("inemail"); 32: String uname=request.getParameter("uname"); </code></pre>
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    1. PO
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    1. This table or related slice is empty.
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    1. USMureinik
    1. USSalini
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    2. PO
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    3. PO
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    1. This table or related slice is empty.
    1. COAdvice.. Avoid using scriptlets and instead use JSTL
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      1. USaraknoid
    2. COr u sure request.getParameter("subject"); or String[] subjects= request.getParameterValues("subject"); ?
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      1. USgjman2
    3. COplz go through MVC architecture
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      1. POCan't convert String to Integer
      1. USgjman2
 

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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.

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