[java] map

[mickey]

Hello,
I need a structure like this:

Hashtable<String, Vector<String>> _examples = new Hashtable<String, Vector<String>>();

Hashtable<String, Vector<String>> _examples = new Hashtable<String, Vector<String>>();

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but I need to insert "record" with duplicate key. HashTable don't permit this.
Is there any other structure? Either a way to solve?

thanks,