gov.sns.tools.math
Class Interval

java.lang.Object
  |
  +--gov.sns.tools.math.Interval

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

ClosedInterval, OpenInterval

public class Interval

extends java.lang.Object

implements java.io.Serializable

Represents an interval on the real line. Issues concerning boundary points are delegated to the derived classes OpenInterval and ClosedInterval.

See Also:

Serialized Form

Constructor Summary

Interval()
Default constructor - creates a new instance of Interval with one point, the origin.

Interval(double min, double max)
Initializing constructor - create an interval with specified endpoints

Interval(Interval I)
Copy constructor - create a new open interval initialized to the argument.

Method Summary

boolean	boundary(double x) Is point a boundary element
Interval	computeHull(Interval I) Compute and return the smallest interval containing both this interval and the argument interval.
boolean	equals(Interval I) Are intervals equal
double	getMax() Get maximum value of interval.
double	getMin() Get minimum value of interval.
double	measure() Compute the interval length
double	midpoint() Compute the interval midpoint
void	print(java.io.PrintWriter os) Print out contents on an output stream
void	println(java.io.PrintWriter os) Print out contents on an output stream, terminate in newline character
void	setMax(double max) Set the right endpoint
void	setMin(double min) Set the left endpoint
java.lang.String	toString() Return the contents of the interval as a String.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Interval

public Interval()

Default constructor - creates a new instance of Interval with one point, the origin.

Interval

public Interval(double min,
                double max)

Initializing constructor - create an interval with specified endpoints

Parameters:

min - left endpoint

max - right endpoint

Interval

public Interval(Interval I)

Copy constructor - create a new open interval initialized to the argument.

Parameters:

I - interval to copy

Method Detail

setMin

public void setMin(double min)

Set the left endpoint

setMax

public void setMax(double max)

Set the right endpoint

getMin

public double getMin()

Get minimum value of interval.

getMax

public double getMax()

Get maximum value of interval.

measure

public double measure()

Compute the interval length

midpoint

public double midpoint()

Compute the interval midpoint

computeHull

public Interval computeHull(Interval I)

Compute and return the smallest interval containing both this interval and the argument interval.

Parameters:

I - argument

Returns:

convex hull of this and I

boundary

public boolean boundary(double x)

Is point a boundary element

Parameters:

x - point to be tested as boundary element

Returns:

true if x is a boundary element

equals

public boolean equals(Interval I)

Are intervals equal

Parameters:

I - interval object to be checked for equality

Returns:

true if both objects are equal as intervals

toString

public java.lang.String toString()

Return the contents of the interval as a String. return string representation of interval

Overrides:

toString in class java.lang.Object

See Also:

Object.toString()

print

public void print(java.io.PrintWriter os)

Print out contents on an output stream

Parameters:

os - output stream receiving content dump

println

public void println(java.io.PrintWriter os)

Print out contents on an output stream, terminate in newline character

Parameters:

os - output stream receiving content dump