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`java.lang.Object`

`java.awt.geom.Point2D`

**Implemented Interfaces:**- Cloneable

**Known Direct Subclasses:**- Point, Point2D.Double, Point2D.Float

This class implements a generic point in 2D Cartesian space. The storage
representation is left up to the subclass. Point includes two useful
nested classes, for float and double storage respectively.

**Since:**- 1.2

## Nested Class Summary

`static class`

`Point2D.Double`

- This class defines a point in
`double`

precision.

`static class`

`Point2D.Float`

- This class defines a point in
`float`

precision.

## Constructor Summary

`Point2D()`

- The default constructor.

## Method Summary

`Object`

`clone()`

- Create a new point of the same run-time type with the same contents as this one.

`double`

`distance(double x, double y)`

- Return the distance from this point to the given one.

`static double`

`distance(double x1, double y1, double x2, double y2)`

- Return the distance between two points.

`double`

`double`

`distanceSq(double x, double y)`

- Return the square of the distance from this point to the given one.

`static double`

`distanceSq(double x1, double y1, double x2, double y2)`

- Return the square of the distance between two points.

`double`

`distanceSq(Point2D p)`

- Return the square of the distance from this point to the given one.

`boolean`

`abstract double`

`getX()`

- Get the X coordinate, in double precision.

`abstract double`

`getY()`

- Get the Y coordinate, in double precision.

`int`

`hashCode()`

- Return the hashcode for this point.

`abstract void`

`setLocation(double x, double y)`

- Set the location of this point to the new coordinates.

`void`

`setLocation(Point2D p)`

- Set the location of this point to the new coordinates.

### Methods inherited from class java.lang.Object

`clone`

,`equals`

,`extends Object> getClass`

,`finalize`

,`hashCode`

,`notify`

,`notifyAll`

,`toString`

,`wait`

,`wait`

,`wait`

public Object clone()

Create a new point of the same run-time type with the same contents as this one.

Returns:- the clone

public double distance(double x, double y)

Return the distance from this point to the given one.

Parameters:`x`

- the x coordinate of the other point`y`

- the y coordinate of the other point

Returns:- the distance

public static double distance(double x1, double y1, double x2, double y2)

Return the distance between two points.

Parameters:`x1`

- the x coordinate of point 1`y1`

- the y coordinate of point 1`x2`

- the x coordinate of point 2`y2`

- the y coordinate of point 2

Returns:- the distance from (x1,y1) to (x2,y2)

public double distance(Point2D p)

Return the distance from this point to the given one.

Parameters:`p`

- the other point

Returns:- the distance

Throws:`NullPointerException`

- if p is null

public double distanceSq(double x, double y)

Return the square of the distance from this point to the given one.

Parameters:`x`

- the x coordinate of the other point`y`

- the y coordinate of the other point

Returns:- the square of the distance

public static double distanceSq(double x1, double y1, double x2, double y2)

Return the square of the distance between two points.

Parameters:`x1`

- the x coordinate of point 1`y1`

- the y coordinate of point 1`x2`

- the x coordinate of point 2`y2`

- the y coordinate of point 2

Returns:- (x2 - x1)^2 + (y2 - y1)^2

public double distanceSq(Point2D p)

Return the square of the distance from this point to the given one.

Parameters:`p`

- the other point

Returns:- the square of the distance

Throws:`NullPointerException`

- if p is null

public boolean equals(Object o)

Compares two points for equality. This returns true if they have the same coordinates.

Parameters:`o`

- the point to compare

Returns:- true if it is equal

public abstract double getX()

Get the X coordinate, in double precision.

Returns:- the x coordinate

public abstract double getY()

Get the Y coordinate, in double precision.

Returns:- the y coordinate

public int hashCode()

Return the hashcode for this point. The formula is not documented, but appears to be the same as:long l = Double.doubleToLongBits(getY()); l = l * 31 ^ Double.doubleToLongBits(getX()); return (int) ((l >> 32) ^ l);

Returns:- the hashcode

public abstract void setLocation(double x, double y)

Set the location of this point to the new coordinates. There may be a loss of precision.

Parameters:`x`

- the new x coordinate`y`

- the new y coordinate

public void setLocation(Point2D p)

Set the location of this point to the new coordinates. There may be a loss of precision.

Parameters:`p`

- the point to copy

Throws:`NullPointerException`

- if p is null

Point2D.java -- generic point in 2-D space
Copyright (C) 1999, 2000, 2002, 2004, 2006, Free Software Foundation
This file is part of GNU Classpath.
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