Question

Possible Duplicate:
Creating an instance using the class name and calling constructor

How can I create an object based on the content of a string passed to a method?
For example

createObj(String nameclass){
 **class passed** obj;
}

Answer 1

You can use Class.newInstance() to construct an instance of the class.
You will, however, need to obtain the Class<> object using Class.forName(...)

<T> T createObj(String nameclass) throws ClassNotFoundException,
        InstantiationException, IllegalAccessException {

    Class<T> clazz = (Class<T>) Class.forName(nameclass);

    // assumes the target class has a no-args Constructor
    return clazz.newInstance();
}