Hi
Run the following three codes, you will find the difference
1)
Vector<Integer> v = new Vector<Integer>();
v.add("sdgfas");
v.add(124);
Iterator itr = v.iterator();
while(itr.hasNext()) {
System.out.println(itr.next());
}
2) Vector<String> v = new Vector<String>();
v.add("sdgfas");
v.add(124);
Iterator itr = v.iterator();
while(itr.hasNext()){
System.out.println(itr.next());
}
3) Vector v = new Vector();
v.add("sdgfas");
v.add(124);
Iterator itr = v.iterator();
while(itr.hasNext()){
System.out.println(itr.next());
}
Error will be shown at compile time only.
Thank You
Regards
Rahul Singh
-----Original Message-----
From: javaprogrammingwithpassion@googlegroups.com
[mailto:javaprogrammingwithpass...@googlegroups.com] On Behalf Of Lawrence Louie
Sent: Friday, October 15, 2010 5:06 AM
To: Java Programming Online Training Course By Sang Shin
Subject: [java programming] question on Generics
Hi,
>From reading the Generic subject, it seems to me Generic here refers
to the type that's assigned to a collection which will prevents
ClassCastException.
Ex:
Vector<String> vs = new Vector<String>();
For example, in the sample code above, we are using a Generic of type
string assign to the vector. Is my understanding correct here about
Generic? Thx.
Lawrence
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