In HashMap, hashCode() is used to calculate the bucket and therefore calculate the index. equals method is used to check that 2 objects are equal or not . This method is provided by Object class. You can override this in your class to provide your own implementation.
Read moreWhy we use equals method in Java?
The equals method in Java is invoked every time an object is compared with another object to see if they are equivalent to each other or not i.e. are they the same object in terms of data type and value.
Read moreDo strings use .equals or ==?
Generally . equals is used for Object comparison , where you want to verify if two Objects have an identical value. == for reference comparison (are the two Objects the same Object on the heap) & to check if the Object is null.20 Nis 2009
Read moreCan I use == to compare strings in Java?
To compare these strings in Java, we need to use the equals() method of the string. You should not use == (equality operator) to compare these strings because they compare the reference of the string , i.e. whether they are the same object or not.
Read moreWhich methods are implemented in Object class Java?
Methods of Object class MethodDescriptionpublic int hashCode()returns the hashcode number for this object.public boolean equals(Object obj)compares the given object to this object.protected Object clone() throws CloneNotSupportedExceptioncreates and returns the exact copy (clone) of this object.Java Object Class – Javatpoint www.javatpoint.com › object-class
Read moreWhat is use of equals () in Java?
Java String equals() Method The equals() method compares two strings, and returns true if the strings are equal, and false if not .
Read moreWhy do classes need an equals method?
The equals() method compares two objects for equality and returns true if they are equal . The equals() method provided in the Object class uses the identity operator ( == ) to determine whether two objects are equal. For primitive data types, this gives the correct result.
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