How to sum 2 variables and store it into one variable
<p>I have a mainreport containing 2 different subreports. </p>

<p>I have a variable sum from a subreport1 for example 10(type Integer)</p>

<p>I have another variable sum from another subreport2 for example 2(type Integer)</p>

<p>I have <strong>successfully retreived the 2 variables from each of the subreports</strong>
now I want to create a variable in my mainreport that sums up the 2 variables</p>

<p>so now in my mainreport I have 3 variables </p>

<p>the first variable is called VAR1 and it came  from subreport 1 </p>

<pre><code>Name                       VAR1
Variable Class             java.lang.Integer
Reset type                 Report
initial Value Expression   0
</code></pre>

<p>the second variable is called VAR2 and it came  from subreport 2</p>

<pre><code>Name                       VAR2
Variable Class             java.lang.Integer
Reset type                 Report
initial Value Expression   0
</code></pre>

<p>the last variable is called SUM</p>

<pre><code>Name                       SUM
Variable Class             java.lang.Integer
Reset type                 Report
variable expression        new Integer($V{VAR1}.intValue() + $V{VAR2}.intValue() )
initial Value Expression   0
</code></pre>

<p>The SUM variable is NULL when i preview the pdf , VAR1 and VAR2 are Integer values but the SUM variable is always NULL</p>

<p>could it be that the SUM was evaluated before VAR1 and VAR2?</p>

<p>what is my problem? </p>