Does “put” overwrite existing values?

Question

New to hashtables with a simple question. For some reason googling hasn\'t gotten me a straight answer. Say I\'ve got an hashtable set up:

Answer 1

hmmm ,just need add a line
myHashtable.put(1,"fish");
to see what's amazing happens

see this links:http://docs.oracle.com/javase/6/docs/api/java/util/Hashtable.html#put(K, V)

Returns:
the previous value of the specified key in this hashtable, or null if it did not have one