struts2: setting string value to int field of a bean does not throw any exception

I had a jsp which has a field user age.
age: <s:textfield name="user.age" id="user.age" ></s:textfield>

in action class, i have i create user bean getter and setter.

it works fine if i enter age as integer but if i enter string for age then it does not throw any exception.

where is the problem?

If I understand correctly the problem, use validation.

http://struts.apache.org/2.x/docs/validation.html

Tomas Bilek