Hi everyone,
In the lab 1016, 3.1 build and run a simple application that uses HashMap, and
part 4 of this segment advise us to do our own exercise : please do the
following .... display them in both unsorted and sorted order.
I did the unsorted order and it goes well, but I have a problem with the
unsorted order, I got an execption : java.lang.ClassCastException.
I use putAll() method like that :
Map tm = new TreeMap();
tm.putAll(m);
And then display tm.
I have looked at the JavaDoc about this exception for putAll but I don't really
understand what it means :
ClassCastException - if the class of a key or value in the specified map
prevents it from being stored in this map
Please, help.
Thanks in advance.
Bako
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