physics

Class LineSegment

java.lang.Object

physics.LineSegment

public final class LineSegment
extends java.lang.Object

LineSegment is an immutable abstract data type which represents a line segment in two dimensional Cartesian space.

Constructor Summary

Constructors

Constructor and Description
LineSegment(double x1, double y1, double x2, double y2) Constructs a new line segment from <x1, y1> to <x2, y2>.
LineSegment(java.awt.geom.Line2D l2d)
LineSegment(Vect p1, Vect p2)

Method Summary

Modifier and Type	Method and Description
Angle	angle()
boolean	equals(LineSegment ls)
boolean	equals(java.lang.Object o)
int	hashCode()
double	length()
Vect	p1()
Vect	p2()
java.awt.geom.Line2D.Double	toLine2D()
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

LineSegment

public LineSegment(Vect p1,
                   Vect p2)

Parameters:

p1 - ; requires that p1 is not null

p2 - ; requires that p2 is not null Constructs a new LineSegment between the two points p1 and p2.

LineSegment

public LineSegment(java.awt.geom.Line2D l2d)

Parameters:

l2d - Line2D to create a line segment of; requires that l2d is not null Constructs a new Line Segment with the same coordinates as l2d

LineSegment

public LineSegment(double x1,
                   double y1,
                   double x2,
                   double y2)

Constructs a new line segment from <x1, y1> to <x2, y2>.

Method Detail

p1

public Vect p1()

Returns:

the first point of this line segment.

p2

public Vect p2()

Returns:

the second point of this line segment.

toLine2D

public java.awt.geom.Line2D.Double toLine2D()

Returns:

a new Line2D representing this

angle

public Angle angle()

Returns:

the angle from the x-axis of this.

length

public double length()

Returns:

the length of this.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

equals

public boolean equals(LineSegment ls)

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object