这是java核心上的一段代码
/**
@version 1.31 2004-02-19
@author Cay Horstmann
*/import java.util.*;public class CalendarTest
{
public static void main(String[] args)
{
// construct d as current date
GregorianCalendar d = new GregorianCalendar(); int today = d.get(Calendar.DAY_OF_MONTH);
int month = d.get(Calendar.MONTH); // set d to start date of the month
d.set(Calendar.DAY_OF_MONTH, 12); int weekday = d.get(Calendar.DAY_OF_WEEK); // print heading
System.out.println("Sun Mon Tue Wed Thu Fri Sat"); // indent first line of calendar
for (int i = Calendar.SUNDAY; i < weekday; i++ )
System.out.print(" "); do
{
// print day
int day = d.get(Calendar.DAY_OF_MONTH);
System.out.printf("%3d", day); // current day with *
if (day == today)
System.out.print("*");
else
System.out.print(" "); // start a new line after every Saturday
if (weekday == Calendar.SATURDAY)
System.out.println(); // advance d to the next day
d.add(Calendar.DAY_OF_MONTH, 1);
weekday = d.get(Calendar.DAY_OF_WEEK);
}
while (d.get(Calendar.MONTH)==month);
// the loop exits when d is day 1 of the next month // print final end of line if necessary
if (weekday != Calendar.SUNDAY)
System.out.println();
}
}
请问最后一句
if (weekday != Calendar.SUNDAY)
System.out.println();起什么作用呢?
/**
@version 1.31 2004-02-19
@author Cay Horstmann
*/import java.util.*;public class CalendarTest
{
public static void main(String[] args)
{
// construct d as current date
GregorianCalendar d = new GregorianCalendar(); int today = d.get(Calendar.DAY_OF_MONTH);
int month = d.get(Calendar.MONTH); // set d to start date of the month
d.set(Calendar.DAY_OF_MONTH, 12); int weekday = d.get(Calendar.DAY_OF_WEEK); // print heading
System.out.println("Sun Mon Tue Wed Thu Fri Sat"); // indent first line of calendar
for (int i = Calendar.SUNDAY; i < weekday; i++ )
System.out.print(" "); do
{
// print day
int day = d.get(Calendar.DAY_OF_MONTH);
System.out.printf("%3d", day); // current day with *
if (day == today)
System.out.print("*");
else
System.out.print(" "); // start a new line after every Saturday
if (weekday == Calendar.SATURDAY)
System.out.println(); // advance d to the next day
d.add(Calendar.DAY_OF_MONTH, 1);
weekday = d.get(Calendar.DAY_OF_WEEK);
}
while (d.get(Calendar.MONTH)==month);
// the loop exits when d is day 1 of the next month // print final end of line if necessary
if (weekday != Calendar.SUNDAY)
System.out.println();
}
}
请问最后一句
if (weekday != Calendar.SUNDAY)
System.out.println();起什么作用呢?
weekday这个变量如果不等于星期天 就执行System.out.println(); 也就是换行