Q. What will be the output of following Java code?

import java.util.Hashtable;

public class HashTableClass {
int hashcode;
HashTableClass(int hashcode) {
this.hashcode = hashcode;
}
public int hashCode() {
return hashcode;
}
public String toString() {
return hashcode + " ";
}

public static void main(String[] args) {
Hashtable ht = new Hashtable();

ht.put(new HashTableClass(10), "Java");
ht.put(new HashTableClass(3), "C");
ht.put(new HashTableClass(4), "C++");
ht.put(new HashTableClass(5), "Ruby");
ht.put(new HashTableClass(6), "null");

System.out.println(ht);
}
}