date (5_1).java

清华大学第二版

//程序5-1
public class Date {
	private int day, month, year;
	Date ( int i, int j, int k) {
		day = i;
		month = j;
		year = k;
	}

	Date() {			
		day = 1;
		month = 1;
		year = 1998;
	}

	Date ( Date d) {			
		day = d.day;
		month = d.month;
		year = d.year;
	}

	public Date tomorrow() {
		Date d = new Date(this);	
		d.day++;
		if (d.day > d.daysInMonth()) {  
			d.day = 1;
			d.month ++;
			if (d.month > 12) {
				d.month = 1;
				d.year ++;
			}
		}
		return d;
	}
}