java.util
Class Date

java.lang.Object

  |

  +--java.util.Date

public class Date

extends Object

Constructor Summary

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.

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.

Method Summary

boolean	equals(Object obj) Compares two dates for equality.
long	getTime() Returns the number of milliseconds since January 1, 1970, 00:00:00 GMT represented by this Date object.
int	hashCode() Returns a hash code value for this object.
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.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Date

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.

See Also:

System.currentTimeMillis()

Date

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.

Parameters:

date - the milliseconds since January 1, 1970, 00:00:00 GMT.

See Also:

System.currentTimeMillis()

Method Detail

getTime

public long getTime()

Returns the number of milliseconds since January 1, 1970, 00:00:00 GMT represented by this Date object.

Returns:

the number of milliseconds since January 1, 1970, 00:00:00 GMT represented by this date.

See Also:

setTime(long)

setTime

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.

Parameters:

time - the number of milliseconds.

See Also:

getTime()

equals

public boolean equals(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.

Overrides:

equals in class Object

Parameters:

obj - the object to compare with.

Returns:

true if the objects are the same; false otherwise.

See Also:

getTime()

hashCode

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 getTime() method. That is, the hash code is the value of the expression:

 (int)(this.getTime()^(this.getTime() >>> 32))

Overrides:

hashCode in class Object

Returns:

a hash code value for this object.