Date.java

public class Date implements Comparable<Data> {
	private final int day;
	private final int month;
	private final int year;
	
	public Date( int d, int m, int y ) {
		day = d;
		month = m;
		year = y;
	}
	
	public int day()   { return day; }
	public int month() { return month; }
	public int year()  { return year; }
	
	public int compareTo( Data that ) {
		if ( this.year > that.year ) return +1;
		if ( this.year < that.year ) return -1;
		if ( this.month > that.month ) return +1;
		if ( this.month < that.month ) return -1;
		if ( this.day > that.day ) return +1;
		if ( this.day < that.day ) return -1;
		return 0;
	}
	
	public String toString() {
		return month + "/" + day + "/" + year;
	}
}