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Interview Question


Country: United States
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1
of 1 vote

Hashmaps store things by key, so what you're asking for doesn't make much sense. Every stored value must have an associated key.

- eugene.yarovoi October 29, 2012 | Flag Reply
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0
of 0 vote

I think we can iterate the entire map and keep replacing key with value.. and set value as null..

- Anonymous October 29, 2012 | Flag Reply
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0
of 0 votes

@Eugene: This was asked in an interview. I know it doesn't make sense to remove keys alone, but may be interviewer wants to check some thing else here like how to iterate and remove entries from a map or something like that !!

Thanks for the suggestion !!

- SK October 29, 2012 | Flag
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0
of 0 votes

using ketset() you obtain the set of key in the hashmap. But making all the keys to null is not possible. Hashmap can have only one null key in whole of its hashmap.

- Surendar November 16, 2012 | Flag
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0
of 0 vote

Use Hasmap.keySet() to get all the keys populated in a set and than iterate through it and remove the odd entries ...

- rahul chaudhary October 29, 2012 | Flag Reply
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0
of 0 vote

Will it not throw concurrentModificationException ?- trying to remove while iterating.

- Anonymous November 03, 2012 | Flag Reply
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0
of 0 votes

Yes, every time should update, keyset and iterator

- Andi November 03, 2012 | Flag
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0
of 0 votes

No, it won't throw concurrentModification exception if you traverse using iterator, and remove using iterator.remove method.

- SK November 03, 2012 | Flag
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0
of 0 vote

if

- rahul September 25, 2014 | Flag Reply
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0
of 0 vote

we can do this :Hasmap.keySet() to get all the keys populated in a set and than iterate through it and remove the odd entries.

But while deleting through iterator, it will delete value also. I mean that entryset will be deleted.

- @ rahul chaudhary September 25, 2014 | Flag Reply


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