how to get total page number and hide/show fields in jasper report

[sumitotari09]

HI

     I am using IReport for desighing Jasper reports.I am new i Jasper report. I want to know how to get total number of pages and based on this how to hide/show contents on page.

One more question can i extract variables,parameters and feilds of jasper report in java code?

Pleas help me its argent

 

thanks in advance.

[kati_gomes]

Get total pages:

        Create a variable like:

         <variable name="totalPages" class="java.lang.Integer" resetType="None" incrementType="Report">
          <variableExpression><![CDATA[$V{PAGE_NUMBER}]]></variableExpression>
    </variable>

Based in variable totalPages to hide/show contents on page:

           In some element of page set in property 'Print When Expression' a expression, for example: ($V{totalPages} == 1) || ($V{totalPages} == 2) || ($V{totalPages} % 2 == 0)