关于日期的一个例子

public static void main(String[] args) {

GregorianCalendar d=new GregorianCalendar();

//获取当前日期

int today=d.get(Calendar.DAY_OF_MONTH);

//获取当前月

int month=d.get(Calendar.MONTH);

d.set(Calendar.DAY_OF_MONTH,1);

//获取当前是周几

int weekday=d.get(Calendar.DAY_OF_WEEK);

System.out.println("Sun Mon Tue Wed Thu Fri Sat");

for(int i=Calendar.SUNDAY;i<weekday;i++)

System.out.print("    ");

do

{

int day=d.get(Calendar.DAY_OF_MONTH);

System.out.printf("%3d",day);

if(day==today)

System.out.print("*");

else

System.out.print(" ");

if(weekday==Calendar.SATURDAY)

System.out.println();

d.add(Calendar.DAY_OF_MONTH,1);

weekday=d.get(Calendar.DAY_OF_WEEK);

}

while(d.get(Calendar.MONTH)==month);

if(weekday!=Calendar.SUNDAY)

System.out.println();

}

}