Index (Frames) | Index (No Frames) | Package | Package Tree | Tree
java.awt

Class Point

java.lang.Object
|
+--java.awt.geom.Point2D
   |
   +--java.awt.Point

All Implemented Interfaces:

Serializable, Cloneable


public class Point

extends Point2D

implements Serializable

This class represents a point on the screen using cartesian coordinates. Remember that in screen coordinates, increasing x values go from left to right, and increasing y values go from top to bottom.

There are some public fields; if you mess with them in an inconsistent manner, it is your own fault when you get invalid results. Also, this class is not threadsafe.

Since:Authors:

Field Summary

intx

The x coordinate.
inty

The y coordinate.

Constructor Summary

Point()

Initializes a new instance of Point representing the coordiates (0,0).
Point(java.awt.Point p)

Initializes a new instance of Point with coordinates identical to the coordinates of the specified points.
Point(int x, int y)

Initializes a new instance of Point with the specified coordinates.

Method Summary

booleanequals(java.lang.Object obj)

Tests whether or not this object is equal to the specified object.
java.awt.PointgetLocation()

Returns the location of this point.
doublegetX()

Get the x coordinate.
doublegetY()

Get the y coordinate.
voidmove(int x, int y)

Sets this object's coordinates to the specified values.
voidsetLocation(java.awt.Point p)

Sets this object's coordinates to match those of the specified point.
voidsetLocation(int x, int y)

Sets this object's coordinates to the specified values.
voidsetLocation(double x, double y)

Sets this object's coordinates to the specified values.
java.lang.StringtoString()

Returns a string representation of this object.
voidtranslate(int dx, int dy)

Changes the coordinates of this point such that the specified dx parameter is added to the existing X coordinate and dy is added to the existing Y coordinate.

Field Details

x

public int x

The x coordinate.

See Also:


y

public int y

The y coordinate.

See Also:


Constructor Details

Point

public Point()

Initializes a new instance of Point representing the coordiates (0,0).

Since:

Point

public Point(int x, int y)

Initializes a new instance of Point with the specified coordinates.

Parameters:


Point

public Point(java.awt.Point p)

Initializes a new instance of Point with coordinates identical to the coordinates of the specified points.

Parameters:

Throws:


Method Details

equals

public boolean equals(java.lang.Object obj)

Tests whether or not this object is equal to the specified object. This will be true if and only if the specified object is an instance of Point2D and has the same X and Y coordinates.

Parameters:

Returns:


getLocation

public Point getLocation()

Returns the location of this point. A pretty useless method, as this is already a point.

Since:Returns:

See Also:


getX

public double getX()

Get the x coordinate.

Returns:


getY

public double getY()

Get the y coordinate.

Returns:


move

public void move(int x, int y)

Sets this object's coordinates to the specified values. This method is identical to the setLocation(int, int) method.

Parameters:


setLocation

public void setLocation(double x, double y)

Sets this object's coordinates to the specified values. This method performs normal casting from double to int, so you may lose precision.

Parameters:


setLocation

public void setLocation(int x, int y)

Sets this object's coordinates to the specified values. This method is identical to the move() method.

Parameters:


setLocation

public void setLocation(java.awt.Point p)

Sets this object's coordinates to match those of the specified point.

Since:Parameters:

Throws:


toString

public String toString()

Returns a string representation of this object. The format is: getClass().getName() + "[x=" + x + ",y=" + y + ']'.

Returns:


translate

public void translate(int dx, int dy)

Changes the coordinates of this point such that the specified dx parameter is added to the existing X coordinate and dy is added to the existing Y coordinate.

Parameters: