java.lang.Object | +--java.util.Date
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.
Compares two dates for equality.
Returns the number of milliseconds since January 1, 1970, 00:00:00 GMT represented by this Date object.
Returns a hash code value for this object.
Sets this Date object to represent a point in time that is time milliseconds after January 1, 1970 00:00:00 GMT.
|Methods inherited from class java.lang.Object|
Dateobject 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.
public Date(long date)
Dateobject 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.
date- the milliseconds since January 1, 1970, 00:00:00 GMT.
public long getTime()
public void setTime(long time)
time- the number of milliseconds.
public boolean equals(Object obj)
trueif and only if the argument is not
nulland is a
Dateobject that represents the same point in time, to the millisecond, as this object.
Date objects are equal if and only if the
getTime method returns the same
value for both.
obj- the object to compare with.
trueif the objects are the same;
public int hashCode()
getTime()method. That is, the hash code is the value of the expression:
(int)(this.getTime()^(this.getTime() >>> 32))