/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
 
Hashtable<Integer,String> map=new Hashtable<Integer,String>();
map.put(103,"Amit");
map.put(102, "Ravi");
map.put(101,"Vijay");
map.put(100,"Rahul");
System.out.println("Initial : "+map);
map.putIfAbsent(104,"hh");
System.out.println("Updated : "+map);
 
	}
}

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