Point2D (Java Platform SE 6) (original) (raw)
java.awt.geom
Class Point2D
java.lang.Object
java.awt.geom.Point2D
All Implemented Interfaces:
Direct Known Subclasses:
Point, Point2D.Double, Point2D.Float
public abstract class Point2D
extends Object
implements Cloneable
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 | |
|---|---|
| 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](../../../java/awt/geom/Point2D.html#distance%28double, double%29)(double px, double py) Returns the distance from this Point2D to a specified point. |
| static double | [distance](../../../java/awt/geom/Point2D.html#distance%28double, double, double, double%29)(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](../../../java/awt/geom/Point2D.html#distanceSq%28double, double%29)(double px, double py) Returns the square of the distance from this Point2D to a specified point. |
| static double | [distanceSq](../../../java/awt/geom/Point2D.html#distanceSq%28double, double, double, double%29)(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](../../../java/awt/geom/Point2D.html#setLocation%28double, double%29)(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. |
| Methods inherited from class java.lang.Object |
|---|
| finalize, getClass, notify, notifyAll, toString, wait, wait, [wait](../../../java/lang/Object.html#wait%28long, int%29) |
| Constructor Detail |
|---|
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:
Point2D.Float, Point2D.Double, Point
| Method Detail |
|---|
getX
public abstract double getX()
Returns the X coordinate of this Point2D in double precision.
Returns:
the X coordinate of this Point2D.
Since:
1.2
getY
public abstract double getY()
Returns the Y coordinate of this Point2D in double precision.
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.
Parameters:
x - the new X coordinate of this Point2D
y - the new Y coordinate 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.
Parameters:
p - the specified Point2D to which to set this Point2D
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 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
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 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
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 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
Returns:
the square of the distance between thisPoint2D 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 thisPoint2D to a specified Point2D.
Since:
1.2
distance
public double distance(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
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.
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](../../../java/lang/Object.html#clone%28%29) in class [Object](../../../java/lang/Object.html "class in java.lang")
Returns:
a clone of this instance.
Throws:
[OutOfMemoryError](../../../java/lang/OutOfMemoryError.html "class in java.lang") - if there is not enough memory.
Since:
1.2
See Also:
hashCode
public int hashCode()
Returns the hashcode for this Point2D.
Overrides:
[hashCode](../../../java/lang/Object.html#hashCode%28%29) in class [Object](../../../java/lang/Object.html "class in java.lang")
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 ofPoint2D are equal if the values of their x and y member fields, representing their position in the coordinate space, are the same.
Overrides:
[equals](../../../java/lang/Object.html#equals%28java.lang.Object%29) in class [Object](../../../java/lang/Object.html "class in java.lang")
Parameters:
obj - an object to be compared with this Point2D
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:
Submit a bug or feature
For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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