What is the compareTo method in Java?

Can you explain the compareTo method in Java?

Sure! The compareTo method is used to compare two objects in Java. It returns a negative integer, zero, or a positive integer if the first object is less than, equal to, or greater than the second object.

How do I implement the compareTo method in my class?

To implement compareTo, your class should implement the Comparable interface. Then, you need to override the compareTo method to define the natural ordering of the objects.

Can you give me an example of using compareTo?

Certainly! Here's a simple example: if you have a class Person with an age attribute, you can compare two Person objects like this:

public class Person implements Comparable<Person> {
    int age;
    
    public int compareTo(Person other) {
        return this.age - other.age;
    }
}