import java.util.*;
class Hashtable1{
public static void main(String args[]){
Hashtable<Integer,String> hm=new Hashtable<Integer,String>();
hm.put(100,"Amit");
hm.put(102,"Ravi");
hm.put(101,"Vijay");
hm.put(103,"Rahul");
for(Map.Entry m:hm.entrySet()){
System.out.println(m.getKey()+" "+m.getValue());
}
}
}