Member Avatar for eddy556

I'm having problems performing math in JSP. I have a line:

double percentage = (useful / nonuseful) * 100;

which is giving me an error, how do I fix this?

Thanks

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  • Latest Post Latest Post by eddy556
Member Avatar for electron33 
<%
        double useful = 12;
        double nonuseful = 24;
        double percentage = ( useful / nonuseful ) * 100;
    %>
    <%= percentage %>

In this example it will be 50.0 in the JSP page.

Member Avatar for eddy556

Okay now I'm getting errors about doubles and integers the values in the database are stored as doubles

Type mismatch: cannot convert from double to int

136: double useful = columns.getDouble("Customer_Useful");
137: double nonuseful = columns.getDouble("Customer_NotUseful");
138: votes = useful + nonuseful;
139: double percentage = (useful / nonuseful) * 100;

Member Avatar for electron33

Can you paste me the whole code. Including variable declaration. Some where in the declaration a variable have been declared int.

Member Avatar for eddy556

Its ok its been solved now

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