Warning!Please help.

I am using Netbeans5.5 .When i am compiling my project its giving me the warning as-- uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
I know the solution is for some generic but some of my java code does not even us the Collection objects Still its giving me the error.
Please help me for this warning.
Do we really have to considers these warnings or neglect them.

I am trying to insert values to the SQL database .the save jsp page is showing this error connot solve this problem kindly help
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 9 in the jsp file: /Modules/employer/process/SaveEmployerRegistration.jsp
Generated servlet error:
C:\Documents and Settings\meenalw\.netbeans\5.5\apache-tomcat-5.5.17_base\work\Catalina\localhost\EasyJob\org\apache\jsp\Modules\employer\process\SaveEmployerRegistration_jsp.java:83: incompatible types
found : void
required: int
a=employerRegistration.setStdcode1(Integer.parseInt(employerRegistrationBean.getStdcode1()));
^
I need help .

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