javaAPI(4)之DateFormat,Date,Calendar类的使用创建日历

import java.text.DateFormat;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import java.util.GregorianCalendar;import java.util.Scanner;/** * 创建日历 * @author xasmall *  */public class CalendarTest{    public static void main(String[] args) {        System.out.println("请按照yyyy-MM-dd格式输入!");        Scanner sc=new Scanner(System.in);        String str=sc.nextLine();        System.out.println(str);        sc.close();        DateFormat dateFormat=new SimpleDateFormat("yyyy-MM-dd");        try {            Date date=dateFormat.parse(str);            Calendar calendar=new GregorianCalendar();            calendar.setTime(date);            int dateSetDay=calendar.get(Calendar.DATE);            calendar.set(Calendar.DATE, 1);            int date_day=calendar.getActualMaximum(Calendar.DAY_OF_MONTH);            int firstDay_from_Sunday=calendar.get(Calendar.DAY_OF_WEEK);            System.out.println((calendar.get(Calendar.MONTH)+1)+"月第一天为星期"+(firstDay_from_Sunday-1));            System.out.println((calendar.get(Calendar.MONTH)+1)+"月有:"+date_day+"天");            System.out.println("日\t一\t二\t三\t四\t五\t六");            int j=1;            for(int k=0;k<firstDay_from_Sunday-1;k++){                System.out.print('\t');            }            for(int i=1;i<=date_day;i++){                System.out.print(i);                j++;                if(i==dateSetDay){                    System.out.print('*');                }                if((j+firstDay_from_Sunday-2)%7==0){                    System.out.println();                }                else{                    System.out.print('\t');                }            }        } catch (ParseException e) {            e.printStackTrace();        }    }}