java.lang.Object
java.awt.geom.Point2D
- All Implemented Interfaces:
Cloneable
- Direct Known Subclasses:
Point
,Point2D.Double
,Point2D.Float
The
Point2D
class defines a point representing a location
in (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
Modifier and TypeClassDescriptionstatic class
TheDouble
class defines a point specified indouble
precision.static class
TheFloat
class defines a point specified in float precision. -
Constructor Summary
ModifierConstructorDescriptionprotected
Point2D()
This is an abstract class that cannot be instantiated directly. -
Method Summary
Modifier and TypeMethodDescriptionclone()
Creates a new object of the same class and with the same contents as this object.double
distance
(double px, double py) Returns the distance from thisPoint2D
to a specified point.static double
distance
(double x1, double y1, double x2, double y2) Returns the distance between two points.double
Returns the distance from thisPoint2D
to a specifiedPoint2D
.double
distanceSq
(double px, double py) Returns the square of the distance from thisPoint2D
to a specified point.static double
distanceSq
(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 thisPoint2D
to a specifiedPoint2D
.boolean
Determines whether or not two points are equal.abstract double
getX()
Returns the X coordinate of thisPoint2D
indouble
precision.abstract double
getY()
Returns the Y coordinate of thisPoint2D
indouble
precision.int
hashCode()
Returns the hashcode for thisPoint2D
.abstract void
setLocation
(double x, double y) Sets the location of thisPoint2D
to the specifieddouble
coordinates.void
Sets the location of thisPoint2D
to the same coordinates as the specifiedPoint2D
object.
-
Constructor Details
-
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
- See Also:
-
-
Method Details
-
getX
public abstract double getX()Returns the X coordinate of thisPoint2D
indouble
precision.- Returns:
- the X coordinate of this
Point2D
. - Since:
- 1.2
-
getY
public abstract double getY()Returns the Y coordinate of thisPoint2D
indouble
precision.- Returns:
- the Y coordinate of this
Point2D
. - Since:
- 1.2
-
setLocation
public abstract void setLocation(double x, double y) Sets the location of thisPoint2D
to the specifieddouble
coordinates.- Parameters:
x
- the new X coordinate of thisPoint2D
y
- the new Y coordinate of thisPoint2D
- Since:
- 1.2
-
setLocation
Sets the location of thisPoint2D
to the same coordinates as the specifiedPoint2D
object.- Parameters:
p
- the specifiedPoint2D
to which to set thisPoint2D
- Since:
- 1.2
-
distanceSq
public static double distanceSq(double x1, double y1, double x2, double y2) Returns the square of the distance between two points.- Parameters:
x1
- the X coordinate of the first specified pointy1
- the Y coordinate of the first specified pointx2
- the X coordinate of the second specified pointy2
- the Y coordinate of the second specified point- 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) Returns the distance between two points.- Parameters:
x1
- the X coordinate of the first specified pointy1
- the Y coordinate of the first specified pointx2
- the X coordinate of the second specified pointy2
- the Y coordinate of the second specified point- Returns:
- the distance between the two sets of specified coordinates.
- Since:
- 1.2
-
distanceSq
public double distanceSq(double px, double py) Returns the square of the distance from thisPoint2D
to a specified point.- Parameters:
px
- the X coordinate of the specified point to be measured against thisPoint2D
py
- the Y coordinate of the specified point to be measured against thisPoint2D
- Returns:
- the square of the distance between this
Point2D
and the specified point. - Since:
- 1.2
-
distanceSq
Returns the square of the distance from thisPoint2D
to a specifiedPoint2D
.- Parameters:
pt
- the specified point to be measured against thisPoint2D
- Returns:
- the square of the distance between this
Point2D
to a specifiedPoint2D
. - Since:
- 1.2
-
distance
public double distance(double px, double py) Returns the distance from thisPoint2D
to a specified point.- Parameters:
px
- the X coordinate of the specified point to be measured against thisPoint2D
py
- the Y coordinate of the specified point to be measured against thisPoint2D
- Returns:
- the distance between this
Point2D
and a specified point. - Since:
- 1.2
-
distance
Returns the distance from thisPoint2D
to a specifiedPoint2D
.- Parameters:
pt
- the specified point to be measured against thisPoint2D
- Returns:
- the distance between this
Point2D
and the specifiedPoint2D
. - Since:
- 1.2
-
clone
Creates a new object of the same class and with the same contents as this object.- Overrides:
clone
in classObject
- Returns:
- a clone of this instance.
- Throws:
OutOfMemoryError
- if there is not enough memory.- Since:
- 1.2
- See Also:
-
hashCode
-
equals
Determines whether or not two points are equal. Two instances ofPoint2D
are equal if the values of theirx
andy
member fields, representing their position in the coordinate space, are the same.
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