Java class list like in Python

Question

I have classes which are inherited from abstract Packet( this class has abstract method named read which reads from ByteBuffer).

in Python i would do something like...

class Blabla(Packet):
    pass
class Blabla2(Packet):
    pass

and then i would init each class in list like this

_packets = [Blabla, Blabla2]

and when i would identify id of packet i would do like this

pck = _packets[packetId]()

Want to do the same in java. Is there any fast way(except using switch)

NPE · Accepted Answer · 2011-07-08 09:24:43Z

4

Yes, it is possible to do something very similar in Java.

You could have a list of Class objects and then call list.get(packetId).newInstance() to create an instance of the correct class.

See the Javadoc.

answered Jul 8, 2011 at 9:24

NPE

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Comments

Vijay Mathew · Accepted Answer · 2011-07-08 09:49:44Z

3

This is what you should do:

ArrayList<Class> list = new ArrayList<Class>();
list.add(Class.forName("Blabla"));
list.add(Class.forName("Blabla2"));

list.get(packetId).newInstance();

answered Jul 8, 2011 at 9:49

Vijay Mathew

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Comments

Thilo · Accepted Answer · 2011-07-08 09:25:08Z

2

Maybe you are looking for Class#newInstance().

answered Jul 8, 2011 at 9:25

Thilo

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