How to obtain a generic type parameter

We cannot get the date type from the vector<date> vector = new vector<date> () but we can get the type of date in the following way

1. Write a method that side of the following fit Word

public class Itcastannotation {

public static void Main (String args[]) {

2. Get the byte code of this class

Class clazz = Itcastannotation.class;

3. Obtain the method object corresponding to the GetType methods for obtaining the class by reflection
Method method = Clazz.getdeclaredmethod ("GetType", Vector.class);

4 by looking up a jdk1.5 document, you can send a method of getgenericparametertypes () to obtain the parameters of an enumerated type, and return an array
type[] Type = Method.getgenericparametertypes ();

Force the downward type to be converted into his subclass
Parameterizedtype Typep = (parameterizedtype) type[0];

5jdk.1.5 the Getrawtyep () method to obtain the source type
System.out.println (Typep.getrawtype ());

6getActualTypeArguments () Gets an array of type parameters, and the first print gets the type of date
System.out.println (typep.getactualtypearguments () [0]);
}
private static void GetType (Vector<date> Vector) {

}

}