Arun Kantilal Rajput

• Nov 22nd, 2006

 

hi,

yes, HashMap can store null values.

u can have new HashMap("a",null);

also key can be null ie new HashMap(null,null);

value can be retrieved by get method ie get(null) returns null.

chow.

Avitra

• Nov 23rd, 2006

 

hashmap accepts null values.

we can set null values by put method & get the values by get method

put(null,null)

Satish Bakde

• Nov 24th, 2006

 

Yes, HashMap can store null values. The argumemnts to the put method of HashMap takes two arguments key-which is object and value-which is again object. null is empty unallocated object. So it can be used as key as well as value.

There can be mutiple null values present in a HashMap. Restriction is on keys which should be unique. HashMap allows only one null key. If we put more with key null, it replaces previous value with new value.

sadashivarao

 Profile Answers by sadashivarao Questions by sadashivarao

• Nov 29th, 2006

 

a hash map can store one null key and many null values.

Andrews

• Nov 30th, 2006

 

   Yes, A hashmap allows null values.But it allows only one Null Key,  because in Hash Maps keys maintains the unique Key property.

Thanks & Regards,

Andrews.

Mayank Shrivastava

• Dec 11th, 2006

 

Yes Hashmap can store null values ,it can hold only one null key but it can hold more then one null values.

Kanhaiya

• Dec 12th, 2006

 

HashMap can store null values. You can store null key and value as much u want.

santh kumar

 Profile Answers by santh kumar 

• Dec 13th, 2006

 

Hi Guys, It's a Solid Answer for all ur doubts. i gave u with an example. HashMap hs=new HashMap();1) hs.put("1", "Russel");2) hs.put("2","Kumble");3) hs.put("null","........." );4) hs.put("null","Stevewaugh " );5) hs.put(" "," " );6) hs.put("2","RanaTunga"); 7) System.out.println(hs.get("2"));8) System.out.println(hs.get("1"));9) System.out.println(hs.get(" "));10) System.out.println(hs.get("null")); It allows numerous null values.it allows duplicate keys also.for example key=2 in the above program it possess recent value is RanaTunga instead of Kumble.for line:5 it prints even space also, as i said earlier what would be the result for (10) ? guess it ?, It's ur Turn.

santh kumar

 Profile Answers by santh kumar 

• Dec 13th, 2006

 

I entered clearly. with spaces and next lines.Why i'm getting data collabarated? it is not easy to read. any suggestions would be appreciated. what should i do to be in the same format exactly how i entered. with regards, santh

vikas singh

• Dec 23rd, 2006

 

hi

your ans is too good.........