Class Point2D

java.lang.Object
java.awt.geom.Point2D
All Implemented Interfaces:
Cloneable
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

    Nested Classes
    Modifier and Type
    Class
    Description
    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

    Constructors
    Modifier
    Constructor
    Description
    protected
    Point2D()
    This is an abstract class that cannot be instantiated directly.

  • Method Summary

    Modifier and Type
    Method
    Description
    Object
    clone()
    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 this Point2D to a specified point.
    static double
    distance(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)
    Returns the square of the distance from this Point2D 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 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.

    Methods declared in class Object

    finalize, getClass, notify, notifyAll, toString, wait, wait, wait

  • 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 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 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)
      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 in class Object
      Returns:
      a clone of this instance.
      Throws:
      OutOfMemoryError - if there is not enough memory.
      Since:
      1.2
      See Also:

    • hashCode

      public int hashCode()
      Returns the hashcode for this Point2D.
      Overrides:
      hashCode in class Object
      Returns:
      a hash code for this Point2D.
      See Also:

    • 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.
      Overrides:
      equals in class Object
      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: