Comparing Java objects with equals() and hashcode()
Java's equals()
and hashcode()
are two methods that work together to verify if two objects have the same value. You can use them to make object comparisons easy and efficient in your Java programs.
Java equals() and hashcode()
In this article, you'll learn:
- Why override
equals()
andhashcode()
in Java? - How to compare Java objects with
equals()
- How to identify Java objects with
hashcode()
- How to use
equals()
andhashcode()
with collections
You'll also get:
- Guidelines for using
equals()
andhashcode()
- Rules for making object comparisons with
equals()
andhashcode()
- Mistakes to avoid when using
equals()
andhashcode()
- What to remember about
equals()
andhashcode()