I am trying to override equals method in Java. I have a class People which basically has 2 data fields name and age. Now I want to override equals method so that I can check between 2 …

Jun 13, 2012 · Possible Duplicate: Java: Always override equals? should I override equals function for any class that I create? even for very simple classes which only contains some …

Feb 23, 2010 · How do I override the equals method in the object class? i.e I have class Person{ //need to override here public boolean equals (Object obj){ } I want to convert the parameter …

Aug 26, 2008 · Whenever a.equals(b), then a.hashCode() must be same as b.hashCode(). In practice: If you override one, then you should override the other. Use the same set of fields …

Mar 2, 2013 · Java recommends to override equals and hashCode method if equality is going to be defined by logical way or via some business logic: example: many classes in Java standard …

724 Joshua Bloch says on Effective Java You must override hashCode () in every class that overrides equals (). Failure to do so will result in a violation of the general contract for …

In most of your code, calling the one that didn't properly override Object 's equals was fine, but not compatible with ArrayList. So, not overriding the method correctly can cause problems. I …

May 31, 2011 · You can and should use a Set to hold an object type with an overridden equals method, but you may need to override hashCode () too. Equal objects must have equal hash …

May 11, 2020 · Assuming the following example: public record SomeRecord(int foo, byte bar, long baz) { } Do I need to override hashCode and equals if I were to add said object to a HashMap?

Jun 15, 2011 · The contract for equals says that all objects that are equal must have the same hash code. So if you override equals () you must override hashCode ().