Class Rectangle
 All Implemented Interfaces:
Serializable
The coordinate space for rectangles and points is considered to have increasing values downward and to the right from its origin making this the normal, computer graphics oriented notion of (x, y) coordinates rather than the strict mathematical one.
The hashCode() method in this class uses the values of the public fields to compute the hash value. When storing instances of the class in hashed collections, do not modify these fields after the object has been inserted.
Application code does not need to explicitly release the
resources managed by each instance when those instances are no longer
required, and thus no dispose()
method is provided.

Field Summary

Constructor Summary
ConstructorDescriptionRectangle
(int x, int y, int width, int height) Construct a new instance of this class given the x, y, width and height values. 
Method Summary
Modifier and TypeMethodDescriptionvoid
Destructively replaces the x, y, width and height values in the receiver with ones which represent the union of the rectangles specified by the receiver and the given rectangle.boolean
contains
(int x, int y) Returnstrue
if the point specified by the arguments is inside the area specified by the receiver, andfalse
otherwise.boolean
Returnstrue
if the given point is inside the area specified by the receiver, andfalse
otherwise.boolean
Compares the argument to the receiver, and returns true if they represent the same object using a class specific comparison.int
hashCode()
Returns an integer hash code for the receiver.void
Destructively replaces the x, y, width and height values in the receiver with ones which represent the intersection of the rectangles specified by the receiver and the given rectangle.intersection
(Rectangle rect) Returns a new rectangle which represents the intersection of the receiver and the given rectangle.boolean
intersects
(int x, int y, int width, int height) Returnstrue
if the rectangle described by the arguments intersects with the receiver andfalse
otherwise.boolean
intersects
(Rectangle rect) Returnstrue
if the given rectangle intersects with the receiver andfalse
otherwise.boolean
isEmpty()
Returnstrue
if the receiver does not cover any area in the (x, y) coordinate plane, andfalse
if the receiver does cover some area in the plane.toString()
Returns a string containing a concise, humanreadable description of the receiver.Returns a new rectangle which represents the union of the receiver and the given rectangle.

Field Details

x
public int xthe x coordinate of the rectangle 
y
public int ythe y coordinate of the rectangle 
width
public int widththe width of the rectangle 
height
public int heightthe height of the rectangle


Constructor Details

Rectangle
public Rectangle(int x, int y, int width, int height) Construct a new instance of this class given the x, y, width and height values. Parameters:
x
 the x coordinate of the origin of the rectangley
 the y coordinate of the origin of the rectanglewidth
 the width of the rectangleheight
 the height of the rectangle


Method Details

add
Destructively replaces the x, y, width and height values in the receiver with ones which represent the union of the rectangles specified by the receiver and the given rectangle.The union of two rectangles is the smallest single rectangle that completely covers both of the areas covered by the two given rectangles.
 Parameters:
rect
 the rectangle to merge with the receiver Throws:
IllegalArgumentException
 ERROR_NULL_ARGUMENT  if the argument is null

contains
public boolean contains(int x, int y) Returnstrue
if the point specified by the arguments is inside the area specified by the receiver, andfalse
otherwise. Parameters:
x
 the x coordinate of the point to test for containmenty
 the y coordinate of the point to test for containment Returns:
true
if the rectangle contains the point andfalse
otherwise

contains
Returnstrue
if the given point is inside the area specified by the receiver, andfalse
otherwise. Parameters:
pt
 the point to test for containment Returns:
true
if the rectangle contains the point andfalse
otherwise Throws:
IllegalArgumentException
 ERROR_NULL_ARGUMENT  if the argument is null

equals
Compares the argument to the receiver, and returns true if they represent the same object using a class specific comparison. 
hashCode
public int hashCode()Returns an integer hash code for the receiver. Any two objects that returntrue
when passed toequals
must return the same value for this method. 
intersect
Destructively replaces the x, y, width and height values in the receiver with ones which represent the intersection of the rectangles specified by the receiver and the given rectangle. Parameters:
rect
 the rectangle to intersect with the receiver Throws:
IllegalArgumentException
 ERROR_NULL_ARGUMENT  if the argument is null

intersection
Returns a new rectangle which represents the intersection of the receiver and the given rectangle.The intersection of two rectangles is the rectangle that covers the area which is contained within both rectangles.
 Parameters:
rect
 the rectangle to intersect with the receiver Returns:
 the intersection of the receiver and the argument
 Throws:
IllegalArgumentException
 ERROR_NULL_ARGUMENT  if the argument is null

intersects
public boolean intersects(int x, int y, int width, int height) Returnstrue
if the rectangle described by the arguments intersects with the receiver andfalse
otherwise.Two rectangles intersect if the area of the rectangle representing their intersection is not empty.
 Parameters:
x
 the x coordinate of the origin of the rectangley
 the y coordinate of the origin of the rectanglewidth
 the width of the rectangleheight
 the height of the rectangle Returns:
true
if the rectangle intersects with the receiver, andfalse
otherwise Throws:
IllegalArgumentException
 ERROR_NULL_ARGUMENT  if the argument is null
 Since:
 3.0
 See Also:

intersects
Returnstrue
if the given rectangle intersects with the receiver andfalse
otherwise.Two rectangles intersect if the area of the rectangle representing their intersection is not empty.
 Parameters:
rect
 the rectangle to test for intersection Returns:
true
if the rectangle intersects with the receiver, andfalse
otherwise Throws:
IllegalArgumentException
 ERROR_NULL_ARGUMENT  if the argument is null
 See Also:

isEmpty
public boolean isEmpty()Returnstrue
if the receiver does not cover any area in the (x, y) coordinate plane, andfalse
if the receiver does cover some area in the plane.A rectangle is considered to cover area in the (x, y) coordinate plane if both its width and height are nonzero.
 Returns:
true
if the receiver is empty, andfalse
otherwise

toString
Returns a string containing a concise, humanreadable description of the receiver. 
union
Returns a new rectangle which represents the union of the receiver and the given rectangle.The union of two rectangles is the smallest single rectangle that completely covers both of the areas covered by the two given rectangles.
 Parameters:
rect
 the rectangle to perform union with Returns:
 the union of the receiver and the argument
 Throws:
IllegalArgumentException
 ERROR_NULL_ARGUMENT  if the argument is null
 See Also:
