Java’s equals() and hashcode() are two methods that work together to verify if two objects have the same value. You can use them to make object comparisons easy and efficient in your Java programs. In ...

hash code associated with each entry and doesn't bother checking for object equality if the hash codes don't match, and so **Equal objects must have equals hash codes**. // The worst possible legal ...

For writing any java program whether it is simple or complex the most commonly required classes and interfaces are grouped into a separate package which is nothing but java.lang package we are not ...