Why is it important to override the hashCode and equals method of Object class in Java?

Why it is important to override the hashCode and equals method in Java.
What is hashCode and equals method. What is its importance in hashMap and hashTable.
Get the answer in detail by watching the video.

# Java code
# hashCode
# equals
# CoreJava ||||||||||||||| 200% ||||||||||||||| 2K/1K