Can't get values in the output.csv

[gregeal]

Hi,

I tried using your code but can get the output to the output.csv file.
The issue is here
for (String y : map1.keySet())
{
if (!map2.containsKey(y)) {
// System.out.println("Roll.no:" +y);
String val=map1.get(y);
System.out.println("The Value mapped to Key is:" +y+ " "+ val);

Can you please help resolve?
Thanks