UrbanPro
true

Take BCA Tuition from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

Search in

Differences Between HashMap vs HashSet In Java.

Paras Chawla
29/05/2017 0 0

HashSet

HashMap

HashSet implements Set interface.

HashMap implements Map interface.

HashSet stores the data as objects.

HashMap stores the data as key-value pairs.

HashSet internally uses HashMap.

HashMap internally uses an array of Entry<K, V>objects.

HashSet doesn’t allow duplicate elements.

HashMap doesn’t allow duplicate keys, but allows duplicate values.

HashSet allows only one null element.

HashMap allows one null key and multiple null values.

Insertion operation requires only one object.

Insertion operation requires two objects, key and value.

HashSet is slightly slower than HashMap.

HashMap is slightly faster than HashSet.

 

Similarities Between HashMap And HashSet In Java :

1) Both data structures don’t maintain any order for the elements.

2) Both use hashCode() and equals() method to maintain the uniqueness of the data.

3) The iterators returned by both are fail-fast in nature.

4) Both give constant time performance for insertion and removal operations.

5) Both are not synchronized.

0 Dislike
Follow 0

Please Enter a comment

Submit

Other Lessons for You

Java
Java is a high level language which is far better than procedural languages like C, Fortran and Pascal. Java completely stands with the principles of OOPS (Object Oriented Programming Structure). The...
A

Abhisheak Saxena

0 0
0

Understanding concept of Inheritance in Java
Inheritance: Acquiring a properties and methods from Parent class to Child class. For example, In some cases we can hear from any one of your relative or your friends will say like that "You are bahaving...

Malware
Malware Vivek like any other teenage boy loves to play online games on his phone. He usually downloads the free games available at the trusted market zones. One day, he got an SMS “Click...

Java Hash Map internal implementation
1.Hash Map internal implementation: In hash map it will create an array of table (to store the {Key,Value} pair) which is of type java.util.HashMap.EntryThe Entry object contains {hash, key, next, value}...
R

Java inheritance example
Answer these questions Answer the above question
X

Looking for BCA Tuition Classes?

The best tutors for BCA Tuition Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Take BCA Tuition with the Best Tutors

The best Tutors for BCA Tuition Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more