Clean Code

Listing B-5 (continued)
SpreadsheetDate.java

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385
Appendix B: 
org.jfree.date.SerialDate
187 /**
188 * Returns the serial number for the date, where 1 January 1900 = 2
189 * (this corresponds, almost, to the numbering system used in Microsoft
190 * Excel for Windows and Lotus 1-2-3).
191 *
192 * @return The serial number of this date.
193 */
194 public int toSerial() {
195 return this.serial;
196 }
197 
198 /**
199 * Returns a java.util.Date equivalent to this date.
200 *
201 * @return The date.
202 */
203 public Date toDate() {
204 final Calendar calendar = Calendar.getInstance();
205 calendar.set(getYYYY(), getMonth() - 1, getDayOfMonth(), 0, 0, 0);
206 return calendar.getTime();
207 }
208 
209 /**
210 * Returns the year (assume a valid range of 1900 to 9999).
211 *
212 * @return The year.
213 */
214 public int getYYYY() {
215 return this.year;
216 }
217 
218 /**
219 * Returns the month (January = 1, February = 2, March = 3).
220 *
221 * @return The month of the year.
222 */
223 public int getMonth() {
224 return this.month;
225 }
226 
227 /**
228 * Returns the day of the month.
229 *
230 * @return The day of the month.
231 */
232 public int getDayOfMonth() {
233 return this.day;
234 }
235 
236 /**
237 * Returns a code representing the day of the week.
238 *
239 * The codes are defined in the {@link SerialDate} class as:
240 * SUNDAY, MONDAY, TUESDAY,
241 * WEDNESDAY, THURSDAY, FRIDAY, and
242 * SATURDAY.
243 *
244 * @return A code representing the day of the week.
245 */
246 public int getDayOfWeek() {
247 return (this.serial + 6) % 7 + 1;
248 }