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HashMap Duplicate Key should give error?

 
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the following code should have given me error for "duplicate" key. but it is not giving. why?

 
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Android Tomcat Server Java
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It is just replacing the value mapped by key 'word'. It is not creating any new entry in map.

After first call of put method a mapping is created.
And for any subsequent call to put method if the map contained a mapping for key, the old value is replaced.
 
Em Aiy
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Anuj Prashar wrote:It is just replacing the value mapped by key 'word'. It is not creating any new entry in map.


but it should give error "duplicate entry" (word). isn't it so ?
 
Anuj Prashar
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check this this

After first call, subsequent call to put method will replace old value if mapping for key you are using in your put method already exist.
 
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