Java 代码

import java.util.Arrays;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class Main {
    static Set<String> set = new HashSet<String>();

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String[] a = s.split("/");
        f(a[0], a[1], a[2]);
        f(a[2], a[0], a[1]);
        f(a[2], a[1], a[0]);
        Object[] set2 = set.toArray();
        Arrays.sort(set2);
        for (int i = 0; i < set2.length; i++) {
            System.out.println(set2[i]);
        }
    }

    public static void f(String y, String m, String d) {
        int year = Integer.parseInt(y);
        int month = Integer.parseInt(m);
        int day = Integer.parseInt(d);
        if (year >= 60) {
            year = 1900 + year;
        } else {
            year = 2000 + year;
        }
        if (month >= 1 && month <= 12) {
            if (month == 4 || month == 6 || month == 9 || month == 11) {
                if (day >= 1 && day <= 30) {
                    String s = year + "-" + ((month == 11) ? "" : "0") + month + "-" + (day >= 10 ? "" : "0") + day;
                    set.add(s);
                }
            } else if (month == 2) {
                if (year % 4 == 0 && day >= 1 && day <= 29) {
                    String s = year + "-" + "0" + month + "-" + (day >= 10 ? "" : "0") + day;
                    set.add(s);
                }
                if (year % 4 != 0 && day >= 1 && day <= 28) {
                    String s = year + "-" + "0" + month + "-" + (day >= 10 ? "" : "0") + day;
                    set.add(s);
                }
            } else {
                if (day >= 1 && day <= 31) {
                    String s = year + "-" + ((month == 10 || month == 12) ? "" : "0") + month + "-"
                            + (day >= 10 ? "" : "0") + day;
                    set.add(s);
                }
            }
        }
    }
}