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Chapter 19 java.awt Reference |
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Point
Name
Point
![[Graphic: Figure from the text]](./figs/point.gif)
Description
The Point class encapsulates a pair of x and y coordinates within a single object.
Class Definition
public class java.awt.Point
extends java.lang.Object
implements java.io.Serializable {
// Variables
public int x;
public int y;
// Constructors
public Point(); 
public Point (int width, int height);
public Point (Point p);
// Instance Methods
public boolean equals (Object object);
public Point getLocation();
public int hashCode();
public void move (int x, int y);
public void setLocation (int x, int y);
public void setLocation (Point p);
public String toString();
public void translate (int deltax, int deltay);
}
Variables
x
public int x
The coordinate that represents the horizontal position.
y
public int y
The coordinate that represents the vertical position.
Constructors
Point
public Point()
- Description
-
Constructs a Point object initialized to (0, 0).
public Point (int x, int y)
- Parameters
-
- x
-
Coordinate that represents the horizontal position.
- y
-
Coordinate that represents the vertical position.
- x
- Description
-
Constructs a Point object with an initial position of (x, y).
public Point (Point p)
- Parameters
-
- p
-
Initial position.
- p
- Description
-
Constructs a Point object with the same position as p.
Instance Methods
equals
public boolean equals (Object object)
- Parameters
-
- object
-
The object to compare.
- object
- Returns
-
true if both points have the same x and y coordinates, false otherwise.
- Overrides
-
Object.equals()
- Description
-
Compares two different Point instances for equivalence.
getLocation
public Point getLocation()
- Returns
-
Position of this point.
- Description
-
Gets the current position of this Point.
hashCode
public int hashCode()
- Returns
-
A hashcode to use the Point is used as a key in a Hashtable.
- Overrides
-
Object.hashCode()
- Description
-
Generates a hashcode for the Point.
move
public void move (int x, int y)
- Parameters
-
- x
-
The new x coordinate.
- y
-
The new y coordinate.
- x
- Description
-
Changes the Point's location to (x, y).
setLocation
public void setLocation (int x, int y)
- Parameters
-
- x
-
The new x coordinate.
- y
-
The new y coordinate.
- x
- Description
-
Changes the Point's location to (x, y).
public void setLocation (Point p)
- Parameters
-
- p
-
The new location.
- p
- Description
-
Changes the Point's location to p.
toString
public String toString()
- Returns
-
A string representation of the Point object.
- Overrides
-
Object.toString()
translate
public void translate (int deltax, int deltay)
- Parameters
-
- deltax
-
Amount to move horizontally.
- deltay
-
Amount to move vertically.
- deltax
- Description
-
Moves the Point to the location (x+deltax, y+deltay).
See Also
Object, String
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Polygon |
