Sorting a List alphabetically using compareTo() method

Question

I am writing a phonebook program in java and i need to list people in the list alphabetically and to do that i need to write a sorting algorithm for a list in java and it sh

Answer 1

You can make your Person class implement Comparable, and define the following method:

    public class Person implements Comparable {

       // Your previous code

       public int compareTo(Person other) {
          if (other == null) {
             // throw exception for example
          }
          return this.name.toLowerCase().compareTo(other.name.toLowerCase());
       }
    }