HashMap using null as key

[Deepak Sahu]

Hi All,

Can someone clarify my following doubt.


HashMap hm =new HashMap();

hm.put("A","RAM");
hm.put(null,"Laxman");

System.out println(hm.get(null));

Output -Laxman


My dobut is while using hm.get(null) ,It should thow NullPointerException.But output coming as "Laxman" .Can Someone clarify it for me.

[Bear Bibeault]

Deepak Sahu wrote:It should thow NullPointerException.

Why?

[Bear Bibeault]

Hint: have you read the javadoc?