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Class sg.Line 

java.lang.Object
   |
   +----sg.Line
public class Line
extends Object
implements Polygon
The class Line defines a geometric object line.

Constructor Index

o Line()
Default zero-parameter constructor that sets the line to the default line consisting of a single pixel at (0,0).
o Line(Pixel, Pixel)
Two-parameter constructor

Method Index

o isParallel(Line)
Returns true if the slope of the object line is the same as the slope of the line L.
o paint(Graphics)
Draws the line on the graphic device g.
o slope()
Computes the slope of the line.

Constructors

o Line 
 public Line()
Default zero-parameter constructor that sets the line to the default line consisting of a single pixel at (0,0).

o Line 
 public Line(Pixel start,
             Pixel end)
Two-parameter constructor

Parameters:
start - starting pixel of the line
end - ending pixel of the line

Methods

o slope 
 public double slope()
Computes the slope of the line.

Returns:
double the slope. If the line is vertical, return Double.POSITIVE_INFINITY or Double.NEGATIVE_INFINITY as appropriate.
o isParallel 
 public boolean isParallel(Line L)
Returns true if the slope of the object line is the same as the slope of the line L.

Parameters:
L - the line whose slope is to be compared to the slope of the object line.
Returns:
true if the slope of the object is the same as the slope of the argument; false otherwise.
o paint 
 public void paint(Graphics g)
Draws the line on the graphic device g.

Parameters:
g - the simple graphics device on which to draw. 
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