构造方法充当临时对象&Calendar的使用

package test1;

import java.util.Calendar;

public class Date {
    int year;
    int month;
    int day;
    int week;
    int hour;
    int minute;
    int second;

    // 跟类同名的构造方法
    public Date(int year, int month, int day, int week, int hour, int minute,
            int second) {
        this.year = year;
        this.month = month;
        this.day = day;
        this.week = week;
        this.hour = hour;
        this.minute = minute;
        this.second = second;
    }

    public static void main(String[] args) {
        Date date = date(2011, 12, 26);
        System.out.println(date.year + "年" + date.month + "月" + date.day + "日 "
                + date.hour + "点" + date.minute + "分" + date.second + "秒  周"
                + date.week);
    }

    public static Date date(int year, int month, int day) {
        Calendar cal = Calendar.getInstance();
        // 月份要注意减1
        cal.set(year, month - 1, day);
        year = cal.get(Calendar.YEAR);
        month = cal.get(Calendar.MONTH);
        day = cal.get(Calendar.DAY_OF_MONTH);
        // 星期注意减一
        int week = cal.get(Calendar.DAY_OF_WEEK) - 1;
        int hour = cal.get(Calendar.HOUR_OF_DAY);
        int minute = cal.get(Calendar.MINUTE);
        int second = cal.get(Calendar.SECOND);
        Date date = new Date(year, month, day, week, hour, minute, second);
        return date;
    }
}