Hashmap tables htpair

#1

What is meant by HTPAIR ?

#2

What is meant by null ponter exception?

#3

HTPair is basically short for HashTablePair. In your Hash Table, you will be storing key-value pairs, so we have defined a class called HTPair like this :

class HTPair{
int key;
int value;
}

So when you create a linkedlist of type HTPair, each node of the linkedlist will contain values of type HTPair i.e each node will have a key and value associated with it.

NullPointerException is a RuntimeException. In Java, a special null value can be assigned to an object reference. NullPointerException is thrown when your code attempts to use an object reference that has the null value.

For example: say you have a Node n = null;
Now if you try to access n.value in your code, it will give a NullPointerException because the node is null and does not have any place in memory that can be accessed.

#4

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