comparable - public Person (String first, String last,...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
The Comparable interface The Comparable interface is defined in the java.lang package and it contains only one method, compareTo , which takes an object as a parameter and returns an integer. Any class that implements the Comparable interface needs to define compareTo method and their instantiated objects become something that can be compared. // Represents a Person. public class Person implements Comparable { private String firstName, lastName, phone; // Sets up this Person with the specified information.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: public Person (String first, String last, String telephone) { firstName = first; lastName = last; phone = telephone; } // Uses both last and first names to determine lexical ordering. public int compareTo (Object other) { int result; if (lastName.equals(((Person)other).lastName)) result = firstName.compareTo(((Person)other).firstName); else result = lastName.compareTo(((Person)other).lastName); return result; } }...
View Full Document

This note was uploaded on 11/09/2010 for the course CSE 71682 taught by Professor Nakamura during the Spring '10 term at ASU.

Ask a homework question - tutors are online