CSc 2310 Principles of Computer Programming I
Spring 1999
Programming Assignment #7
Due: 3 May 1999 (Monday)

Complete the specification of the Date class as defined below. Submit Date.java and Date.class I am providing the TestDate.java program which can be used to test the Date class.

public class Date {
  private int day;
  private int month;
  private int year;

  // Constructor 
  public Date(int m, int d, int y) {
    day = d;
    month = m;
    year = y;
  }

  // Returns the Date obtained by adding nDays to the receiving
  // Date object.
  public Date add(int nDays) {

  }

  // Returns the Date obtained by subtracting nDays from the receiving
  // Date object.
  public Date sub(int nDays) {

  }

  // Returns the number of days between d and the receiving Date object
  public int daysBetween(Date d) {

  }

  // Returns true if the receiving Date object is after Date d.
  public boolean after(Date d) {

  }

  // Returns true if the receiving Date object is same as Date d.
  public boolean equals(Date d) {

  }

  // Returns true if the receiving Date object is before Date d.
  public boolean before(Date d) {

  }

  // Returns the Date object corresponding to the previous day for the
  // receiving Data object.
  public Date yesterday() {

  }

  // Returns the Date object corresponding to the first day of the
  // previous month for the receiving Data object.
  public Date firstOfPreviousMonth() {

  }

  // Returns the Date object corresponding to the next day for the
  // receiving Data object.
  public Date tomorrow() {

  }

  // Returns the Date object corresponding to the first day of the
  // next month for the receiving Data object.
  public Date firstOfNextMonth() {

  }

  // Pretty print method
  public String toString() {
    String sMonths =
       "01January:02February:03March:04April:05May:06June:" +
       "07July:08August:09September:10October:11November:12December:";
    String m;
    if (month < 10) m = "0"+month; else m = ""+month;
    int i = sMonths.indexOf(m);
    int j = sMonths.indexOf(":",i+1);
    String sMonth = sMonths.substring(i+2,j);
    return day + " " + sMonth + ", " + year;
  }


  private static boolean leapYear(int year) {
    return  ((year%4 == 0) && !(year%100 == 0 && year%400 != 0));
  }

}