小编aaa*_*aaa的帖子

public class Date {
    private int month; // must be 1-12
    private int day; // must be 1-31

    public int getMonth() {return month;}

    public int getDay() {return day;}

    public Date(int m, int d) {
        if (m >= 1 && m <= 12)
            month = m;
        else
            month = 1;

        if (d >= 1 && d <= 31)
            day = d;
        else
            day = 1;
    } // end constructor
} // end class Date

比较器类

import java.util.*;
public class DateComparator implements …