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How do you override equals method?
The String class overrides the equals method it inherited from the Object class and implemented logic to compare the two String objects character by character. The reason the equals method in the Object class does reference equality is because it does not know how to do anything else.
Can equals be overridden?
We can override the equals method in our class to check whether two objects have same data or not.
What happens if equals is not overridden?
31 Answers. You must override hashCode() in every class that overrides equals(). Failure to do so will result in a violation of the general contract for Object. hashCode(), which will prevent your class from functioning properly in conjunction with all hash-based collections, including HashMap, HashSet, and Hashtable.
Is there a way to override the equals method?
If you are extremely risk-averse, you can override the equals method to ensure that it isn’t invoked accidentally: The equals method implements an equivalence relation. It has these properties: Reflexive: For any non-null reference value x, x.equals (x) must return true.
Is it safe to overriding equals in C #?
Later in this post, we’re going to be overriding Equals and == with our own behavior, however, so you can see that depending on these two for reference equality is not always a safe bet. If we ever want to be certain that we are performing a reference equality check, we can call the following static method:
Which is an example of overriding equals in Java?
A superclass has already overridden equals, and the superclass behavior is appropriate for this class. For example, most Set implementations inherit their equals implementation from AbstractSet, List implementations from AbstractList, and Map implementations from AbstractMap.
When to use the overriding annotation in Java?
Here People is different than Object. When a method signature remains the identical to that of its superclass, it is called overriding and the @Override annotation helps distinguish the two at compile-time: Without seeing the actual declaration of age, it is difficult to say why the error appears.