How can I implement a comparable interface in Java?

How can I implement a comparable interface in Java?

To implement a comparable interface in Java, your class needs to implement the Comparable<T> interface and override the compareTo method.

Can you show me an example of the compareTo method?

Sure! Here's a simple example:

public class Person implements Comparable<Person> {
    private String name;
    private int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    @Override
    public int compareTo(Person other) {
        return this.age - other.age; // Compare by age
    }
}

What if I want to compare by name instead?

You can modify the compareTo method to compare by name like this:

@Override
public int compareTo(Person other) {
    return this.name.compareTo(other.name); // Compare by name
}

Are there any best practices for implementing comparable?

Yes, ensure that your compareTo method is consistent with equals, and consider using Comparator for multiple sorting criteria.