java.awt
Class Point
java.lang.Object
|
+--java.awt.geom.Point2D
|
+--java.awt.Point
All Implemented Interfaces:
Serializable, Cloneable
This class represents a point on the screen using cartesian coordinates.
Remember that in screen coordinates, increasing x values go from left to
right, and increasing y values go from top to bottom.
There are some public fields; if you mess with them in an inconsistent
manner, it is your own fault when you get invalid results. Also, this
class is not threadsafe.
Since:Authors:- Per Bothner <bothner@cygnus.com>
- Aaron M. Renn <arenn@urbanophile.com>
- Eric Blake <ebb9@email.byu.edu>
x
public int x
The x coordinate.
See Also:
y
public int y
The y coordinate.
See Also:
Point
public Point()
Initializes a new instance of Point
representing the
coordiates (0,0).
Since:
Point
public Point(int x, int y)
Initializes a new instance of Point
with the specified
coordinates.
Parameters:
Point
public Point(java.awt.Point p)
Initializes a new instance of Point
with coordinates
identical to the coordinates of the specified points.
Parameters:
Throws:
equals
public boolean equals(java.lang.Object obj)
Tests whether or not this object is equal to the specified object.
This will be true if and only if the specified object is an instance
of Point2D and has the same X and Y coordinates.
Parameters:
Returns:
- true if the specified object is equal
getLocation
public Point getLocation()
Returns the location of this point. A pretty useless method, as this
is already a point.
Since:Returns:
See Also:
getX
public double getX()
Get the x coordinate.
Returns:
- the value of x, as a double
getY
public double getY()
Get the y coordinate.
Returns:
- the value of y, as a double
move
public void move(int x, int y)
Sets this object's coordinates to the specified values. This method
is identical to the setLocation(int, int)
method.
Parameters:
setLocation
public void setLocation(double x, double y)
Sets this object's coordinates to the specified values. This method
performs normal casting from double to int, so you may lose precision.
Parameters:
setLocation
public void setLocation(int x, int y)
Sets this object's coordinates to the specified values. This method
is identical to the move()
method.
Parameters:
setLocation
public void setLocation(java.awt.Point p)
Sets this object's coordinates to match those of the specified point.
Since:Parameters:
Throws:
toString
public String toString()
Returns a string representation of this object. The format is:
getClass().getName() + "[x=" + x + ",y=" + y + ']'
.
Returns:
- a string representation of this object
translate
public void translate(int dx, int dy)
Changes the coordinates of this point such that the specified
dx
parameter is added to the existing X coordinate and
dy
is added to the existing Y coordinate.
Parameters:
There are some public fields; if you mess with them in an inconsistent manner, it is your own fault when you get invalid results. Also, this class is not threadsafe.