Aim:
Write a class for current time and date.
Theory:
Java
- Date & Time
Java provides the Date
class available in java.util package, this class encapsulates the
current date and time. The Date class supports two constructors. The first
constructor initializes the object with the current date and time.
Date ()
The following
constructor accepts one argument that equals the number of milliseconds that
have elapsed since midnight, January 1, 1970
Date (long millisec)
Once
you have a Date object available, you can call any of the following support
methods to play with dates: Methods with Description
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1
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boolean
after(Date date) Returns true if the invoking Date object
contains a date that is later than the one specified by date, otherwise, it
returns false.
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2
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boolean
before(Date date) Returns true if the invoking Date object
contains a date that is earlier than the one specified by date, otherwise, it
returns false.
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3
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Object
clone( ) Duplicates the invoking Date object.
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4
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int
compareTo(Date date) Compares the value of the invoking object with
that of date. Returns 0 if the values are equal. Returns a negative value if
the invoking object is earlier than date. Returns a positive value if the
invoking object is later than date.
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5
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int
compareTo(Object obj) Operates identically to compareTo(Date) if obj
is of class Date. Otherwise, it throws a ClassCastException.
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6
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boolean
equals(Object date) Returns true if the invoking Date object
contains the same time and date as the one specified by date, otherwise, it
returns false.
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7
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long
getTime( ) Returns the number of milliseconds that have
elapsed since January 1, 1970.
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8
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int
hashCode( ) Returns a hash code for the invoking object.
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9 void
setTime(long time) Sets the time and date as specified by time,
which represents an elapsed time in milliseconds from midnight, January 1,
1970
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10
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String
toString( ) Converts the invoking Date object into a
string and returns the result.
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Program:
import java.util.Date;
public class DateDemo {
public
static void main(String args[]) {
// Instantiate a Date object
Date date = new Date();
// display time and date using toString()
System.out.println(date.toString());
}
}
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