Datepublic class Date extends Object | The class Date represents a specific instant in time, with millisecond
precision.
This class has been subset for the J2ME based on the JDK 1.3 Date class.
Many methods and variables have been pruned, and other methods
simplified, in an effort to reduce the size of this class.
Although the Date class is intended to reflect coordinated universal
time (UTC), it may not do so exactly, depending on the host environment
of the Java Virtual Machine. Nearly all modern operating systems assume
that 1 day = 24x60x60 = 86400 seconds in all cases. In UTC, however,
about once every year or two there is an extra second, called a "leap
second." The leap second is always added as the last second of the
day, and always on December 31 or June 30. For example, the last minute
of the year 1995 was 61 seconds long, thanks to an added leap second.
Most computer clocks are not accurate enough to be able to reflect the
leap-second distinction. |
| Fields Summary |
|---|
| private Calendar | calendar | | private long | fastTime |
| Constructors Summary |
|---|
public Date()Allocates a Date object and initializes it to
represent the current time specified number of milliseconds since the
standard base time known as "the epoch", namely January 1,
1970, 00:00:00 GMT.
this(System.currentTimeMillis());
| public Date(long date)Allocates a Date object and initializes it to
represent the specified number of milliseconds since the
standard base time known as "the epoch", namely January 1,
1970, 00:00:00 GMT.
calendar = Calendar.getInstance();
if (calendar != null) {
calendar.setTimeInMillis(date);
}
fastTime = date;
|
| Methods Summary |
|---|
| public boolean | equals(java.lang.Object obj)Compares two dates for equality.
The result is true if and only if the argument is
not null and is a Date object that
represents the same point in time, to the millisecond, as this object.
Thus, two Date objects are equal if and only if the
getTime method returns the same long
value for both.
return obj != null && obj instanceof Date && getTime() == ((Date) obj).getTime();
| | public long | getTime()Returns the number of milliseconds since January 1, 1970, 00:00:00 GMT
represented by this Date object.
if (calendar != null) {
return calendar.getTimeInMillis();
} else {
return fastTime;
}
| | public int | hashCode()Returns a hash code value for this object. The result is the
exclusive OR of the two halves of the primitive long
value returned by the {@link Date#getTime}
method. That is, the hash code is the value of the expression:
(int)(this.getTime()^(this.getTime() >>> 32))
long ht = getTime();
return (int)ht ^ (int)(ht >> 32);
| | public void | setTime(long time)Sets this Date object to represent a point in time that is
time milliseconds after January 1, 1970 00:00:00 GMT.
if (calendar != null) {
calendar.setTimeInMillis(time);
}
fastTime = time;
| | public java.lang.String | toString()Converts this Date object to a String
of the form:
dow mon dd hh:mm:ss zzz yyyy
where:
- dow is the day of the week (Sun, Mon, Tue, Wed,
Thu, Fri, Sat).
- mon is the month (Jan, Feb, Mar, Apr, May, Jun,
Jul, Aug, Sep, Oct, Nov, Dec).
- dd is the day of the month (01 through
31), as two decimal digits.
- hh is the hour of the day (00 through
23), as two decimal digits.
- mm is the minute within the hour (00 through
59), as two decimal digits.
- ss is the second within the minute (00 through
61, as two decimal digits.
- zzz is the time zone (and may reflect daylight savings
time). If time zone information is not available,
then zzz is empty - that is, it consists
of no characters at all.
- yyyy is the year, as four decimal digits.
return com.sun.cldc.util.j2me.CalendarImpl.toString(calendar);
|
|
