write a progam hashmap & hashtable?

Question Posted / gopalraop

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write a progam hashmap & hashtable?..

Answer / ajay yadav

** HASH MAP **
import java.util.*;
class myhashmap
{
public static void main(strings args[])
{
HashMap map=new HashMap();
map.put("fname","abc");
map.put("email","abc@yahoo.com");
map.put("age",21);
map.put("","");
System.out.println(map.get("fname"));
System.out.println(map.get("age"));
}
}

** Hash Table **

import java.util.*;
class testhashtable
{
public static void main(string args[])
{
Hashtable<String,Integer> num=new Hashtable<String.Integer>
();
num.put("one",new Integer(1));
num.put("two",new.Integer(2));
Integer n=(Integer) num.get("two");
if(n!=null)
{
System.out.println("two="+n);
}
}
}

Difference b/w two is...Hash Map allows NULL values whereas
Hash table not.

Is This Answer Correct ?

2 Yes

1 No

write a progam hashmap & hashtable?..

Answer / dileep

import java.io.*;
class Hashtable
{
public static void main (String args[])
{
Hashtable h=new hahtable();
h.add("dil");
h.add("ppp");
h.add("kkk");
System.out.println("the value of h is "+h);
System.out.println("the value of size is"+h.size());
}
}
import java.io.*;
class Hashmap
{
public static void main(String args[])
{
h.put("1","kkk");
h.put("2","ppp");
System.out.println("the value of h is"+h);
}
}
suppose if we use the haahtable then the we have to use
Enumeration concept and suppose if we use the HashMap then
we have to use Iterator concept.

Is This Answer Correct ?

3 Yes

4 No

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