Datepublic class Date extends Object | The class Date represents a specific instant in time, with millisecond
precision.
This Class has been subset for the MID Profile based on JDK 1.3.
In the full API, the class Date had two additional functions.
It allowed the interpretation of dates as year, month, day, hour,
minute, and second values. It also allowed the formatting and
parsing of date strings. Unfortunately, the API for these functions
was not amenable to internationalization. As of JDK 1.1, the Calendar
class should be used to convert between dates and time fields and
the DateFormat class should be used to format and parse date strings.
The corresponding methods in Date are deprecated.
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 |
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| private long | millis |
| Constructors Summary |
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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.
millis = date;
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| Methods Summary |
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| 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.
return millis;
| | 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.
millis = time;
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