They had given one progam final HashMap hm=new HashMap(); public void show()

They had given one progam
final HashMap hm=new HashMap();
public void show()
{
hm.put("name",value);
}
in this prg here the final hashtable value can be changed in
put method,its the prg run?

Question Posted / ravi

3 Answers
13958 Views
DNS, Wipro, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

They had given one progam final HashMap hm=new HashMap(); public void show() { hm.put("name..

Answer / kr

hash map values can be modified but the hashmap object
cannot be modified
hm.put("name",value); //allowed

hm = new HashMap() // throw error since the object is fianl

Is This Answer Correct ?

19 Yes

1 No

They had given one progam final HashMap hm=new HashMap(); public void show() { hm.put("name..

Answer / abhinav mutreja

Thats Correct that contents of the HashMap can be changed
even if HashMap is declared as final.
If you contents also should not get changed then you can use

Map hm = Collections.unmodifiableMap(new HashMap());
here if you do
hm.put(1,"Hi");

then it would give Runtime Exception :-
Exception in thread "main"
java.lang.UnsupportedOperationException
at java.util.Collections$UnmodifiableMap.put
(Unknown Source)

Is This Answer Correct ?

8 Yes

0 No

They had given one progam final HashMap hm=new HashMap(); public void show() { hm.put("name..

Answer / cool_duzz

no.. final cannot be modified..

Is This Answer Correct ?

2 Yes

9 No

Post New Answer