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java.awt.geom
Class Point2D
java.lang.Object
java.awt.geom.Point2D
-
All Implemented Interfaces:
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Cloneable
-
Direct Known Subclasses:
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Point
,
Point2D.Double
,
Point2D.Float
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public abstract class Point2D
- extends Object
- implements Cloneable
The Point2D class defines a point representing a location in
(x,y)
(x, y)
coordinate space.
This class is only the abstract superclass for all objects that store a 2D coordinate. The actual storage representation of the coordinates is left to the subclass.
-
Since:
-
1.2
Nested Class Summary
|
static class |
Point2D.Double
The Double class defines a point specified in double precision. |
static class |
Point2D.Float
The Float class defines a point specified in float precision. |
Constructor Summary
|
protected |
Point2D
()
This is an abstract class that cannot be instantiated directly. |
Method Summary
|
Object
|
clone
()
Creates a new object of the same class and with the same contents as this object. |
double |
distance
(double px, double py)
(double PX, double PY)
Returns the distance from this Point2D to a specified point. |
static double |
distance
(double x1, double y1, double x2, double y2)
(double X1, double Y1, double X2, double Y2)
Returns the distance between two points. |
double |
distance
(
Point2D
pt)
Returns the distance from this Point2D to a specified Point2D. |
double |
distanceSq
(double px, double py)
(double PX, double PY)
Returns the square of the distance from this Point2D to a specified point. |
static double |
distanceSq
(double x1, double y1, double x2, double y2)
(double X1, double Y1, double X2, double Y2)
Returns the square of the distance between two points. |
double |
distanceSq
(
Point2D
pt)
Returns the square of the distance from this Point2D to a specified Point2D. |
boolean |
equals
(
Object
obj)
Determines whether or not two points are equal. |
abstract double |
getX
()
Returns the X coordinate of this Point2D in double precision. |
abstract double |
getY
()
Returns the Y coordinate of this Point2D in double precision. |
int |
hashCode
()
Returns the hashcode for this Point2D. |
abstract void |
setLocation
(double x, double y)
Sets the location of this Point2D to the specified double coordinates. |
void |
setLocation
(
Point2D
p)
Sets the location of this Point2D to the same coordinates as the specified Point2D object. |
Point2D
protected Point2D()
-
This is an abstract class that cannot be instantiated directly. Type-specific implementation subclasses are available for instantiation and provide a number of formats for storing the information necessary to satisfy the various accessor methods below.
-
Since:
-
1.2
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See Also:
-
Point2D.Float
,
Point2D.Double
,
Point
getX
public abstract double getX()
-
Returns the X coordinate of this Point2D in double precision.
-
-
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Returns:
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the X coordinate of this Point2D.
-
Since:
-
1.2
getY
public abstract double getY()
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Returns the Y coordinate of this Point2D in double precision.
-
-
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Returns:
-
the Y coordinate of this Point2D.
-
Since:
-
1.2
setLocation
public abstract void setLocation(double x,
double y)
-
Sets the location of this Point2D to the specified double coordinates.
-
-
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Parameters:
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x - the new X coordinate of this Point2D
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y - the new Y coordinate of this Point2D
x, y - the coordinates of this Point2D
-
Since:
-
1.2
setLocation
public void setLocation(Point2D p)
-
Sets the location of this Point2D to the same coordinates as the specified Point2D object.
-
-
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Parameters:
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p - the specified Point2D
to
the
which to set this Point2D -
Since:
-
1.2
distanceSq
public static double distanceSq
(double x1,
double y1,
double x2,
double y2) ![](../../../diffpics/oold.gif)
(double X1,
double Y1,
double X2,
double Y2)
-
Returns the square of the distance between two points.
-
-
-
Parameters:
-
x1
X1, Y1
- the
X coordinate
coordinates
of the first
specified
point -
y1 - the Y coordinate of the first specified point
-
x2 - the X coordinate of the second specified point
-
y2 - the Y coordinate of the second specified point
X2, Y2 - the coordinates of the second point
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Returns:
-
the square of the distance between the two sets of specified coordinates.
-
Since:
-
1.2
distance
public static double distance
(double x1,
double y1,
double x2,
double y2) ![](../../../diffpics/oold.gif)
(double X1,
double Y1,
double X2,
double Y2)
-
Returns the distance between two points.
-
-
-
Parameters:
-
x1
X1, Y1
- the
X coordinate
coordinates
of the first
specified
point -
y1 - the Y coordinate of the first specified point
-
x2 - the X coordinate of the second specified point
-
y2 - the Y coordinate of the second specified point
X2, Y2 - the coordinates of the second point
-
Returns:
-
the distance between the two sets of specified coordinates.
-
Since:
-
1.2
distanceSq
public double distanceSq
(double px,
double py) ![](../../../diffpics/oold.gif)
(double PX,
double PY)
-
Returns the square of the distance from this Point2D to a specified point.
-
-
-
Parameters:
-
px - the X coordinate of the specified point to be measured against this Point2D
-
py - the Y coordinate of the specified point to be measured against this Point2D
PX, PY - the coordinates of the other point
-
Returns:
-
the square of the distance between this Point2D and the specified point.
-
Since:
-
1.2
distanceSq
public double distanceSq(Point2D pt)
-
Returns the square of the distance from this Point2D to a specified Point2D.
-
-
-
Parameters:
-
pt - the specified
point to be measured against this
Point2D -
Returns:
-
the square of the distance between this Point2D to a specified Point2D.
-
Since:
-
1.2
distance
public double distance
(double px,
double py) ![](../../../diffpics/oold.gif)
(double PX,
double PY)
-
Returns the distance from this Point2D to a specified point.
-
-
-
Parameters:
-
px - the X coordinate of the specified point to be measured against this Point2D
-
py - the Y coordinate of the specified point to be measured against this Point2D
PX, PY - the coordinates of the specified Point2D
-
Returns:
-
the distance between this Point2D and a specified point.
-
Since:
-
1.2
distance
public double distance(Point2D pt)
-
Returns the distance from this Point2D to a specified Point2D.
-
-
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Parameters:
-
pt - the specified
point to be measured against this
Point2D -
Returns:
-
the distance between this Point2D and the specified Point2D.
-
Since:
-
1.2
clone
public Object clone()
-
Creates a new object of the same class and with the same contents as this object.
-
-
Overrides:
-
clone
in class
Object
-
-
Returns:
-
a clone of this instance.
-
Throws:
-
OutOfMemoryError
- if there is not enough memory.
-
Since:
-
1.2
-
See Also:
-
Cloneable
hashCode
public int hashCode()
-
Returns the hashcode for this Point2D.
-
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Overrides:
-
hashCode
in class
Object
-
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Returns:
-
a hash code for this Point2D.
-
See Also:
-
Object.equals(java.lang.Object)
,
Hashtable
equals
public boolean equals(Object obj)
-
Determines whether or not two points are equal. Two instances of Point2D are equal if the values of their x and y member fields, representing their position in the coordinate space, are the same.
-
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Overrides:
-
equals
in class
Object
-
-
Parameters:
-
obj - an object to be compared with this Point2D
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Returns:
-
true if the object to be compared is an instance of Point2D and has the same values; false otherwise.
-
Since:
-
1.2
-
See Also:
-
Object.hashCode()
,
Hashtable