home *** CD-ROM | disk | FTP | other *** search
Java Source | 2000-05-25 | 3.3 KB | 81 lines |
- //: Month2.java
- //////////////////////////////////////////////////
- // Copyright (c) Bruce Eckel, 1998
- // Source code file from the book "Thinking in Java"
- // All rights reserved EXCEPT as allowed by the
- // following statements: You can freely use this file
- // for your own work (personal or commercial),
- // including modifications and distribution in
- // executable form only. Permission is granted to use
- // this file in classroom situations, including its
- // use in presentation materials, as long as the book
- // "Thinking in Java" is cited as the source.
- // Except in classroom situations, you cannot copy
- // and distribute this code; instead, the sole
- // distribution point is http://www.BruceEckel.com
- // (and official mirror sites) where it is
- // freely available. You cannot remove this
- // copyright and notice. You cannot distribute
- // modified versions of the source code in this
- // package. You cannot use this file in printed
- // media without the express permission of the
- // author. Bruce Eckel makes no representation about
- // the suitability of this software for any purpose.
- // It is provided "as is" without express or implied
- // warranty of any kind, including any implied
- // warranty of merchantability, fitness for a
- // particular purpose or non-infringement. The entire
- // risk as to the quality and performance of the
- // software is with you. Bruce Eckel and the
- // publisher shall not be liable for any damages
- // suffered by you or any third party as a result of
- // using or distributing software. In no event will
- // Bruce Eckel or the publisher be liable for any
- // lost revenue, profit, or data, or for direct,
- // indirect, special, consequential, incidental, or
- // punitive damages, however caused and regardless of
- // the theory of liability, arising out of the use of
- // or inability to use software, even if Bruce Eckel
- // and the publisher have been advised of the
- // possibility of such damages. Should the software
- // prove defective, you assume the cost of all
- // necessary servicing, repair, or correction. If you
- // think you've found an error, please email all
- // modified files with clearly commented changes to:
- // Bruce@EckelObjects.com. (Please use the same
- // address for non-code errors found in the book.)
- /////////////////////////////////////////////////
-
- // A more robust enumeration system
- package c07;
-
- public final class Month2 {
- private String name;
- private Month2(String nm) { name = nm; }
- public String toString() { return name; }
- public final static Month2
- JAN = new Month2("January"),
- FEB = new Month2("February"),
- MAR = new Month2("March"),
- APR = new Month2("April"),
- MAY = new Month2("May"),
- JUN = new Month2("June"),
- JUL = new Month2("July"),
- AUG = new Month2("August"),
- SEP = new Month2("September"),
- OCT = new Month2("October"),
- NOV = new Month2("November"),
- DEC = new Month2("December");
- public final static Month2[] month = {
- JAN, JAN, FEB, MAR, APR, MAY, JUN,
- JUL, AUG, SEP, OCT, NOV, DEC
- };
- public static void main(String[] args) {
- Month2 m = Month2.JAN;
- System.out.println(m);
- m = Month2.month[12];
- System.out.println(m);
- System.out.println(m == Month2.DEC);
- System.out.println(m.equals(Month2.DEC));
- }
- } ///:~