What will happen if two different objects have same hashcode?

• We know that equals() and hashCode() contract  that two unequal object in Java can have same hashcode.  

• Since hashcode is same, bucket location would be same and collision will occur in HashMap. 

• Since HashMap use LinkedList to store object, this entry (object of Map.Entry comprise key and value )  will be stored in LinkedList.  

• There are many collision resolution methods available this is simplest and HashMap in Java does follow this.