Class Point2D

java.lang.Object
java.awt.geom.Point2D
All Implemented Interfaces:
Cloneable
Direct Known Subclasses:
Point,Point2D.Double,Point2D.Float
public abstract classPoint2DextendsObjectimplementsCloneable
ThePoint2D 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 
    TheDouble class defines a point specified indouble precision.
    static class 
    TheFloat class defines a point specified in float precision.

  • Constructor Summary

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

  • Method Summary

    Modifier and Type
    Method
    Description
    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
    Returns the square of the distance from thisPoint2D to a specifiedPoint2D.
    boolean
    Determines whether or not two points are equal.
    abstract double
    Returns the X coordinate of thisPoint2D indouble precision.
    abstract double
    Returns the Y coordinate of thisPoint2D indouble precision.
    int
    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.

    Methods declared in class java.lang.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 thisPoint2D indouble precision.
      Returns:
      the X coordinate of thisPoint2D.
      Since:
      1.2

    • getY

      public abstract double getY()
      Returns the Y coordinate of thisPoint2D indouble precision.
      Returns:
      the Y coordinate of thisPoint2D.
      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

      public void setLocation(Point2D p)
      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 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 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 thisPoint2D and the specified point.
      Since:
      1.2

    • distanceSq

      public double distanceSq(Point2D pt)
      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 thisPoint2D 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 thisPoint2D and a specified point.
      Since:
      1.2

    • distance

      public double distance(Point2D pt)
      Returns the distance from thisPoint2D to a specifiedPoint2D.
      Parameters:
      pt - the specified point to be measured against thisPoint2D
      Returns:
      the distance between thisPoint2D and the specifiedPoint2D.
      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 thisPoint2D.
      Overrides:
      hashCode in class Object
      Returns:
      a hash code for thisPoint2D.
      See Also:

    • equals

      public boolean equals(Object obj)
      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.
      Overrides:
      equals in class Object
      Parameters:
      obj - an object to be compared with thisPoint2D
      Returns:
      true if the object to be compared is an instance ofPoint2D and has the same values;false otherwise.
      Since:
      1.2
      See Also: