Core Java - Interview Questions and Answers for 'Equals method' | Search Interview Question - javasearch.buggybread.com

Javasearch.buggybread.com

Search Interview Questions

More than 3000 questions in repository.

There are more than 900 unanswered questions.
Click here and help us by providing the answer.

Have a video suggestion.
Click Correct / Improve and please let us know.

Submit Question

Core Java - Interview Questions and Answers for 'Equals method' - 2 question(s) found - Order By Newest

Q1. In Java, if object A contains same the same data of object B, are they equal?

Ans. it depends on the implementation of equals method of the respective class. If no definition is provided and it uses the default definition of the object class, two references are equal only if they point to the same object.

We can have such an equality defined for a particular class objects if we provide appropriate implementation of equals method comparing all those fields.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve equals equals method}

Related Questions

Difference between == and .equals() ?

Which String class does not override the equals() and hashCode() methods, inheriting them directly from class Object?

Can we compare Integers by using equals() in Java ?

Write a class and override the equals and hashcode method ?

What is equals method in Java ?

What is a reflexive equals contract ?

Explain Transitive equals contract.

why is "".equals(str); safer than str.equals("")?

Difference between equals and compareTo in Java ?

Q2. why is "".equals(str); safer than str.equals("")?

Ans. str.equals("") this statement will throw NullPointerException if str is null where as "".equals(str) works fine even if str is null

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve equals method Asked in 1 Companies}

Related Questions

In Java, if object A contains same the same data of object B, are they equal?

What is equals method in Java ?

Q3. Which of the following is false ?

a. A Class cannot override both hashcode and equals method.

b. A class can override both hashcode and equals method.

c. A Class must override hashCode method if its overridding equal method.

d. A Class can override hashCode even if its not overridding equals method.

Ans.a. A Class cannot override both hashcode and equals method.