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1The question is a duplicate of thisKurinchiMalar– KurinchiMalar2015-09-23 11:06:05 +00:00Commented Sep 23, 2015 at 11:06
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1possible duplicate of Why does Hashtable not take null key?AndiGeeky– AndiGeeky2015-09-23 11:10:58 +00:00Commented Sep 23, 2015 at 11:10
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Hashtable is older where as HashMap is newer as it was added in 1998. When they implemented HashMap they wanted to lift some of the limitations of Hashtable.Peter Lawrey– Peter Lawrey2015-09-23 13:01:58 +00:00Commented Sep 23, 2015 at 13:01
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