04 JAVA 常用类补充 Scanner和日历

import java.util.*;

public class testScanner {
public static void main(String[] args) {
String c = "";
Scanner sc1 = new Scanner(System.in);

while(sc1.hasNext()){
c = sc1.next();
if(c.equals("*")){
break;
}
System.out.println(c);
}
sc1.close();
}
}

"yyyy.MM.dd G 'at' HH:mm:ss z"

2001.07.04 AD at 12:08:56 PDT

"EEE, MMM d, ''yy"

Wed, Jul 4, '01

"h:mm a"

12:08 PM

"hh 'o''clock' a, zzzz"

12 o'clock PM, Pacific Daylight Time

"K:mm a, z"

0:08 PM, PDT

"yyyyy.MMMMM.dd GGG hh:mm aaa"

02001.July.04 AD 12:08 PM

"EEE, d MMM yyyy HH:mm:ss Z"

Wed, 4 Jul 2001 12:08:56 -0700

"yyMMddHHmmssZ"

010704120856-0700

"yyyy-MM-dd'T'HH:mm:ss.SSSZ"

2001-07-04T12:08:56.235-0700

"yyyy-MM-dd'T'HH:mm:ss.SSSXXX"

2001-07-04T12:08:56.235-07:00

"YYYY-'W'ww-u"

2001-W27-3

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

public class testDate {
public static void main(String[] args) {
Date d = new Date();
long ts = d.getTime();

System.out.println(ts+"--"+System.currentTimeMillis());
d.setTime(1345777767889L);
System.out.println(d);

DateFormat df = new SimpleDateFormat("yyyy.MM.dd");
System.out.println(df.format(d));
String date = "2015.8.1"; //要注意格式的统一，比如2015-8-1就不可以啦
try {
System.out.println(df.parse(date));
} catch (ParseException e) {
e.printStackTrace();
}

import java.util.*;

public class testCalendar {
public static void main(String[] args) {
//Calendar c1 = new GregorianCalendar();
Calendar c = Calendar.getInstance(); //用默认的timezone和locale来创建日历
Date date = new Date();
c.setTime(date);
System.out.println(c.get(Calendar.DAY_OF_WEEK));	//一周的第几天
System.out.println(c.get(Calendar.DAY_OF_YEAR));	//一年中的第几天
System.out.println(c.get(Calendar.DAY_OF_MONTH));	//一月中的第一天
System.out.println(c.get(Calendar.DATE));	//日期
System.out.println(c.get(Calendar.HOUR));	//显示目前几点
System.out.println(c.get(Calendar.YEAR));
System.out.println(c.get(Calendar.WEEK_OF_MONTH));	//一个月中的第几周
System.out.println(c.get(Calendar.WEEK_OF_YEAR));	//一年中的第几周
}
}

import java.text.*;
import java.util.*;

public class VisualCalendar {
public static void main(String[] args) {
System.out.print("输入日期，格式为YYYY-MM-DD：");
Scanner sn = new Scanner(System.in);
String s = sn.next();
DateFormat df = new SimpleDateFormat("yyyy-MM-dd");

try {
Date date = df.parse(s);
System.out.println(date+"\n");
Calendar c = new GregorianCalendar();
c.setTime(date);
int day = c.get(Calendar.DATE);
c.set(Calendar.DATE, 1);
int day_week = c.get(Calendar.DAY_OF_WEEK);
int month = c.getActualMaximum(Calendar.DATE);
System.out.println("日\t一\t二\t三\t四\t五\t六");

for(int j = 1; j < day_week; j++) {
System.out.print(" \t");
}

for(int i = 1; i <= month; i++) {
if(day == i)
System.out.print("*");
System.out.print(i+"\t");
if((i+day_week-1)%7 == 0)
System.out.println("\n");
}
} catch (ParseException e) {
System.out.println("格式错误!");
}
}
}