Need help! How to solve this exception

Question

java.lang.NumberFormatException: For input string: ""

this is how my Java code looks like:

int age=Integer.parseInt(request.getParameter("age"));

Answer 1

If request parameter age is empty, not a number, or missing altogether, you cannot convert it to a number.

You'll have to decide what to do in such situation, then do it in the cases mentioned above, i.e.:

• Check the parameter for non-emptiness
• Surround the conversion with try { ... } catch (NumberFormatException e) { ... }