What is equals() and hashCode() method of a class ?

Question

Explain with example code which depicts real usage of equals() and hashCode() mehod of java.

Answer 1

Both come from Java.lang.Object
equals: returns boolean, proofs for equlity.
hashCode: Returns an int value based on the internals of the object. It is nessaccary for collection stuff. e.g. speed up collection.

read this for further info:

http://www.programcreek.com/2011/07/java-equals-and-hashcode-contract/

Answer 2

http://www.sololearn.com/app/java/playground/cr67aAl7iwf7/