JAVA 日曆

日曆輸出——JAVA

package basicknowledge;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

/**
 * @author o_o
 * 可視化日曆
 */
public class Calendar1 {
    public static void main(String[] args) throws ParseException {

        String str = "2020-2-15";
        String[] str1 = str.split("-");
        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        Date date = dateFormat.parse(str);
        Calendar calendar = new GregorianCalendar();
        calendar.setTime(date);

        System.out.println("輸入日期："+str);
        System.out.println("---------------------------");
        System.out.println("一\t二\t三\t四\t五\t六\t日");
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        int todayDate = calendar.get(Calendar.DAY_OF_WEEK);
        for (int i = 2; (i % 8) != todayDate && i<8; i++) {
                System.out.print("\t");
        }
        int maxDate = calendar.getActualMaximum(Calendar.DATE);
        for (int i = 1; i <= maxDate; i++) {
            if (Integer.parseInt(str1[2]) == calendar.get(Calendar.DAY_OF_MONTH)) {
                System.out.print("*");
            }
            System.out.print(calendar.get(Calendar.DAY_OF_MONTH) + "\t");
            if (calendar.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) {
                System.out.println();
            }
            calendar.add(Calendar.DAY_OF_MONTH, 1);
        }
    }
}

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結果輸出