JavaFX 27 · com.sun.javafx.geom.Rectangle · APIdia, the JavaDoc alternative

A Rectangle specifies an area in a coordinate space that is enclosed by the Rectangle object's upper-left point (x,y) in the coordinate space, its width, and its height.

A Rectangle object's width and height are public fields. The constructors that create a Rectangle, and the methods that can modify one, do not prevent setting a negative value for width or height.

A Rectangle whose width or height is exactly zero has location along those axes with zero dimension, but is otherwise considered empty. The isEmpty method will return true for such a Rectangle. Methods which test if an empty Rectangle contains or intersects a point or rectangle will always return false if either dimension is zero. Methods which combine such a Rectangle with a point or rectangle will include the location of the Rectangle on that axis in the result as if the add(Point) method were being called.

A Rectangle whose width or height is negative has neither location nor dimension along those axes with negative dimensions. Such a Rectangle is treated as non-existant along those axes. Such a Rectangle is also empty with respect to containment calculations and methods which test if it contains or intersects a point or rectangle will always return false. Methods which combine such a Rectangle with a point or rectangle will ignore the Rectangle entirely in generating the result. If two Rectangle objects are combined and each has a negative dimension, the result will have at least one negative dimension.

Methods which affect only the location of a Rectangle will operate on its location regardless of whether or not it has a negative or zero dimension along either axis.

Note that a Rectangle constructed with the default no-argument constructor will have dimensions of 0x0 and therefore be empty. That Rectangle will still have a location of (0,0) and will contribute that location to the union and add operations. Code attempting to accumulate the bounds of a set of points should therefore initially construct the Rectangle with a specifically negative width and height or it should use the first point in the set to construct the Rectangle. For example:

    Rectangle bounds = new Rectangle(0, 0, -1, -1);
    for (int i = 0; i < points.length; i++) {
        bounds.add(points[i]);
    }

or if we know that the points array contains at least one point:

    Rectangle bounds = new Rectangle(points[0]);
    for (int i = 1; i < points.length; i++) {
        bounds.add(points[i]);
    }

This class uses 32-bit integers to store its location and dimensions. Frequently operations may produce a result that exceeds the range of a 32-bit integer. The methods will calculate their results in a way that avoids any 32-bit overflow for intermediate results and then choose the best representation to store the final results back into the 32-bit fields which hold the location and dimensions. The location of the result will be stored into the x and y fields by clipping the true result to the nearest 32-bit value. The values stored into the width and height dimension fields will be chosen as the 32-bit values that encompass the largest part of the true result as possible. Generally this means that the dimension will be clipped independently to the range of 32-bit integers except that if the location had to be moved to store it into its pair of 32-bit fields then the dimensions will be adjusted relative to the "best representation" of the location. If the true result had a negative dimension and was therefore non-existant along one or both axes, the stored dimensions will be negative numbers in those axes. If the true result had a location that could be represented within the range of 32-bit integers, but zero dimension along one or both axes, then the stored dimensions will be zero in those axes.

Field Summary

Modifier and Type	Field and Description
public int	height The height of the `Rectangle`.
public int	width The width of the `Rectangle`.
public int	x The X coordinate of the upper-left corner of the `Rectangle`.
public int	y The Y coordinate of the upper-left corner of the `Rectangle`.

Constructor Summary

Access	Constructor and Description
public	Rectangle() Constructs a new `Rectangle` whose upper-left corner is at (0, 0) in the coordinate space, and whose width and height are both zero.
public	Rectangle(BaseBounds b) Constructs a new `Rectangle`, initialized to match the values of the specified `Rectangle`.
public	Rectangle(Rectangle the `BaseBounds` from which to copy initial values to a newly constructed `Rectangle` r) Constructs a new `Rectangle`, initialized to match the values of the specified `BaseBounds`.
public	Rectangle(int the specified X coordinate x, int the specified Y coordinate y, int the width of the `Rectangle` width, int the height of the `Rectangle` height) Constructs a new `Rectangle` whose upper-left corner is specified as `(x,y)` and whose width and height are specified by the arguments of the same name.
public	Rectangle(int the width of the `Rectangle` width, int the height of the `Rectangle` height) Constructs a new `Rectangle` whose upper-left corner is at (0, 0) in the coordinate space, and whose width and height are specified by the arguments of the same name.

Method Summary

Modifier and Type	Method and Description
public void	add(int the X coordinate of the new point newx, int the Y coordinate of the new point newy) Adds a point, specified by the integer arguments `newx,newy` to the bounds of this `Rectangle`.
public void	add(Rectangle the specified `Rectangle` r) Adds a `Rectangle` to this `Rectangle`.
public boolean	Returns: `true` if the point `(cx,cy)` is inside this `Rectangle`; `false` otherwise. contains(int the specified X coordinate cx, int the specified Y coordinate cy) Checks whether or not this `Rectangle` contains the point at the specified location `(cx,cy)`.
public boolean	Returns: `true` if the `Rectangle` is contained entirely inside this `Rectangle`; `false` otherwise contains(Rectangle the specified `Rectangle` r) Checks whether or not this `Rectangle` entirely contains the specified `Rectangle`.
public boolean	Returns: `true` if the `Rectangle` specified by `(cx, cy, cw, ch)` is entirely enclosed inside this `Rectangle`; `false` otherwise. contains(int the specified X coordinate cx, int the specified Y coordinate cy, int the width of the `Rectangle` cw, int the height of the `Rectangle` ch) Checks whether this `Rectangle` entirely contains the `Rectangle` at the specified location `(cx,cy)` with the specified dimensions `(cw,ch)`.
public boolean	Returns: `true` if the objects are equal; `false` otherwise. equals(Object the `Object` to compare with this `Rectangle` obj) Overrides java.lang.Object.equals. Checks whether two rectangles are equal.
public void	grow(int the horizontal expansion h, int the vertical expansion v) Resizes the `Rectangle` both horizontally and vertically.
public int	hashCode() Overrides java.lang.Object.hashCode. Returns a hash code value for this object.
public Rectangle	intersection(Rectangle r)
public void	intersectWith(Rectangle r)
public boolean	isEmpty()
private void	reshape(int x, int y, int width, int height)
public void	setBounds(Rectangle the specified `Rectangle` r) Sets the bounding `Rectangle` of this `Rectangle` to match the specified `Rectangle`.
public void	setBounds(int the new X coordinate for the upper-left corner of this `Rectangle` x, int the new Y coordinate for the upper-left corner of this `Rectangle` y, int the new width for this `Rectangle` width, int the new height for this `Rectangle` height) Sets the bounding `Rectangle` of this `Rectangle` to the specified `x`, `y`, `width`, and `height`.
public void	setBounds(BaseBounds b)
public RectBounds	toRectBounds()
public String	Returns: a `String` representing this `Rectangle` object's coordinate and size values. toString() Overrides java.lang.Object.toString. Returns a `String` representing this `Rectangle` and its values.
public void	translate(int the distance to move this `Rectangle` along the X axis dx, int the distance to move this `Rectangle` along the Y axis dy) Translates this `Rectangle` the indicated distance, to the right along the X coordinate axis, and downward along the Y coordinate axis.

Inherited from java.lang.Object:: clone finalize getClass notify notifyAll wait wait wait

Field Detail

height	back to summary
public int height The height of the `Rectangle`.

width	back to summary
public int width The width of the `Rectangle`.

x	back to summary
public int x The X coordinate of the upper-left corner of the `Rectangle`.

y	back to summary
public int y The Y coordinate of the upper-left corner of the `Rectangle`.

Constructor Detail

Rectangle	back to summary
public Rectangle() Constructs a new `Rectangle` whose upper-left corner is at (0, 0) in the coordinate space, and whose width and height are both zero.

Rectangle	back to summary
public Rectangle(BaseBounds b) Constructs a new `Rectangle`, initialized to match the values of the specified `Rectangle`.

Rectangle back to summary

Rectangle	back to summary
public Rectangle(Rectangle r) Constructs a new `Rectangle`, initialized to match the values of the specified `BaseBounds`. Since BaseBounds has float values, the Rectangle will be created such that the bounding rectangle of the specified BaseBounds would always lie within the bounding box specified by this Rectangle. Parameters r:Rectangle the `BaseBounds` from which to copy initial values to a newly constructed `Rectangle`

public Rectangle(Rectangle r)

Constructs a new Rectangle, initialized to match the values of the specified BaseBounds. Since BaseBounds has float values, the Rectangle will be created such that the bounding rectangle of the specified BaseBounds would always lie within the bounding box specified by this Rectangle.

Parameters

r:Rectangle: the BaseBounds from which to copy initial values to a newly constructed Rectangle

Rectangle back to summary

Rectangle	back to summary
public Rectangle(int x, int y, int width, int height) Constructs a new `Rectangle` whose upper-left corner is specified as `(x,y)` and whose width and height are specified by the arguments of the same name. Parameters x:int the specified X coordinate y:int the specified Y coordinate width:int the width of the `Rectangle` height:int the height of the `Rectangle`

public Rectangle(int x, int y, int width, int height)

Constructs a new Rectangle whose upper-left corner is specified as (x,y) and whose width and height are specified by the arguments of the same name.

Parameters

x:int: the specified X coordinate
y:int: the specified Y coordinate
width:int: the width of the Rectangle
height:int: the height of the Rectangle

Rectangle back to summary

Rectangle	back to summary
public Rectangle(int width, int height) Constructs a new `Rectangle` whose upper-left corner is at (0, 0) in the coordinate space, and whose width and height are specified by the arguments of the same name. Parameters width:int the width of the `Rectangle` height:int the height of the `Rectangle`

public Rectangle(int width, int height)

Constructs a new Rectangle whose upper-left corner is at (0, 0) in the coordinate space, and whose width and height are specified by the arguments of the same name.

Parameters

width:int: the width of the Rectangle
height:int: the height of the Rectangle

Method Detail

add back to summary

add	back to summary
public void add(int newx, int newy) Adds a point, specified by the integer arguments `newx,newy` to the bounds of this `Rectangle`. If this `Rectangle` has any dimension less than zero, the rules for non-existant rectangles apply. In that case, the new bounds of this `Rectangle` will have a location equal to the specified coordinates and width and height equal to zero. After adding a point, a call to `contains` with the added point as an argument does not necessarily return `true`. The `contains` method does not return `true` for points on the right or bottom edges of a `Rectangle`. Therefore, if the added point falls on the right or bottom edge of the enlarged `Rectangle`, `contains` returns `false` for that point. If the specified point must be contained within the new `Rectangle`, a 1x1 rectangle should be added instead: r.add(newx, newy, 1, 1); Parameters newx:int the X coordinate of the new point newy:int the Y coordinate of the new point

public void add(int newx, int newy)

Adds a point, specified by the integer arguments newx,newy to the bounds of this Rectangle.

If this Rectangle has any dimension less than zero, the rules for non-existant rectangles apply. In that case, the new bounds of this Rectangle will have a location equal to the specified coordinates and width and height equal to zero.

After adding a point, a call to contains with the added point as an argument does not necessarily return true. The contains method does not return true for points on the right or bottom edges of a Rectangle. Therefore, if the added point falls on the right or bottom edge of the enlarged Rectangle, contains returns false for that point. If the specified point must be contained within the new Rectangle, a 1x1 rectangle should be added instead:

    r.add(newx, newy, 1, 1);

Parameters

newx:int: the X coordinate of the new point
newy:int: the Y coordinate of the new point

add back to summary

add	back to summary
public void add(Rectangle r) Adds a `Rectangle` to this `Rectangle`. The resulting `Rectangle` is the union of the two rectangles. If either `Rectangle` has any dimension less than 0, the result will have the dimensions of the other `Rectangle`. If both `Rectangle`s have at least one dimension less than 0, the result will have at least one dimension less than 0. If either `Rectangle` has one or both dimensions equal to 0, the result along those axes with 0 dimensions will be equivalent to the results obtained by adding the corresponding origin coordinate to the result rectangle along that axis, similar to the operation of the `add(Point)` method, but contribute no further dimension beyond that. If the resulting `Rectangle` would have a dimension too large to be expressed as an `int`, the result will have a dimension of `Integer.MAX_VALUE` along that dimension. Parameters r:Rectangle the specified `Rectangle`

public void add(Rectangle r)

Adds a Rectangle to this Rectangle. The resulting Rectangle is the union of the two rectangles.

If either Rectangle has any dimension less than 0, the result will have the dimensions of the other Rectangle. If both Rectangles have at least one dimension less than 0, the result will have at least one dimension less than 0.

If either Rectangle has one or both dimensions equal to 0, the result along those axes with 0 dimensions will be equivalent to the results obtained by adding the corresponding origin coordinate to the result rectangle along that axis, similar to the operation of the add(Point) method, but contribute no further dimension beyond that.

If the resulting Rectangle would have a dimension too large to be expressed as an int, the result will have a dimension of Integer.MAX_VALUE along that dimension.

Parameters

r:Rectangle: the specified Rectangle

contains back to summary

contains	back to summary
public boolean contains(int cx, int cy) Checks whether or not this `Rectangle` contains the point at the specified location `(cx,cy)`. Parameters cx:int the specified X coordinate cy:int the specified Y coordinate Returns:boolean `true` if the point `(cx,cy)` is inside this `Rectangle`; `false` otherwise.

public boolean contains(int cx, int cy)

Checks whether or not this Rectangle contains the point at the specified location (cx,cy).

Parameters

cx:int: the specified X coordinate
cy:int: the specified Y coordinate

Returns:boolean

true if the point (cx,cy) is inside this Rectangle; false otherwise.

contains back to summary

contains	back to summary
public boolean contains(Rectangle r) Checks whether or not this `Rectangle` entirely contains the specified `Rectangle`. Parameters r:Rectangle the specified `Rectangle` Returns:boolean `true` if the `Rectangle` is contained entirely inside this `Rectangle`; `false` otherwise

public boolean contains(Rectangle r)

Checks whether or not this Rectangle entirely contains the specified Rectangle.

Parameters

r:Rectangle: the specified Rectangle

Returns:boolean

true if the Rectangle is contained entirely inside this Rectangle; false otherwise

contains back to summary

contains	back to summary
public boolean contains(int cx, int cy, int cw, int ch) Checks whether this `Rectangle` entirely contains the `Rectangle` at the specified location `(cx,cy)` with the specified dimensions `(cw,ch)`. Parameters cx:int the specified X coordinate cy:int the specified Y coordinate cw:int the width of the `Rectangle` ch:int the height of the `Rectangle` Returns:boolean `true` if the `Rectangle` specified by `(cx, cy, cw, ch)` is entirely enclosed inside this `Rectangle`; `false` otherwise.

public boolean contains(int cx, int cy, int cw, int ch)

Checks whether this Rectangle entirely contains the Rectangle at the specified location (cx,cy) with the specified dimensions (cw,ch).

Parameters

cx:int: the specified X coordinate
cy:int: the specified Y coordinate
cw:int: the width of the Rectangle
ch:int: the height of the Rectangle

Returns:boolean

true if the Rectangle specified by (cx, cy, cw, ch) is entirely enclosed inside this Rectangle; false otherwise.

equals back to summary

equals	back to summary
public boolean equals(Object obj) Overrides java.lang.Object.equals. Checks whether two rectangles are equal. The result is `true` if and only if the argument is not `null` and is a `Rectangle` object that has the same upper-left corner, width, and height as this `Rectangle`. Parameters obj:Object the `Object` to compare with this `Rectangle` Returns:boolean `true` if the objects are equal; `false` otherwise. Annotations @Override

public boolean equals(Object obj)

Overrides java.lang.Object.equals.

Checks whether two rectangles are equal.

The result is true if and only if the argument is not null and is a Rectangle object that has the same upper-left corner, width, and height as this Rectangle.

Parameters

obj:Object: the Object to compare with this Rectangle

Returns:boolean

true if the objects are equal; false otherwise.

Annotations

@Override

grow back to summary

grow	back to summary
public void grow(int h, int v) Resizes the `Rectangle` both horizontally and vertically. This method modifies the `Rectangle` so that it is `h` units larger on both the left and right side, and `v` units larger at both the top and bottom. The new `Rectangle` has `(x - h, y - v)` as its upper-left corner, width of `(width + 2h)`, and a height of `(height + 2v)`. If negative values are supplied for `h` and `v`, the size of the `Rectangle` decreases accordingly. The `grow` method will check for integer overflow and underflow, but does not check whether the resulting values of `width` and `height` grow from negative to non-negative or shrink from non-negative to negative. Parameters h:int the horizontal expansion v:int the vertical expansion

public void grow(int h, int v)

Resizes the Rectangle both horizontally and vertically.

This method modifies the Rectangle so that it is h units larger on both the left and right side, and v units larger at both the top and bottom.

The new Rectangle has (x - h, y - v) as its upper-left corner, width of (width + 2h), and a height of (height + 2v).

If negative values are supplied for h and v, the size of the Rectangle decreases accordingly. The grow method will check for integer overflow and underflow, but does not check whether the resulting values of width and height grow from negative to non-negative or shrink from non-negative to negative.

Parameters

h:int: the horizontal expansion
v:int: the vertical expansion

hashCode back to summary

hashCode	back to summary
public int hashCode() Overrides java.lang.Object.hashCode. Doc from java.lang.Object.hashCode. Returns a hash code value for this object. This method is supported for the benefit of hash tables such as those provided by `java.util.HashMap`. The general contract of `hashCode` is: Whenever it is invoked on the same object more than once during an execution of a Java application, the `hashCode` method must consistently return the same integer, provided no information used in `equals` comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. If two objects are equal according to the `equals` method, then calling the `hashCode` method on each of the two objects must produce the same integer result. It is not required that if two objects are unequal according to the `equals` method, then calling the `hashCode` method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables. Annotations @Override

public int hashCode()

Overrides java.lang.Object.hashCode.

Doc from java.lang.Object.hashCode.

Returns a hash code value for this object. This method is supported for the benefit of hash tables such as those provided by java.util.HashMap.

The general contract of hashCode is:

Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

Annotations

@Override

intersection	back to summary
public Rectangle intersection(Rectangle r)

intersectWith	back to summary
public void intersectWith(Rectangle r)

isEmpty	back to summary
public boolean isEmpty()

reshape	back to summary
private void reshape(int x, int y, int width, int height)

setBounds back to summary

setBounds	back to summary
public void setBounds(Rectangle r) Sets the bounding `Rectangle` of this `Rectangle` to match the specified `Rectangle`. This method is included for completeness, to parallel the `setBounds` method of `Component`. Parameters r:Rectangle the specified `Rectangle` See Also `getBounds`, `java.awt.Component#setBounds(java.awt.Rectangle)`

public void setBounds(Rectangle r)

Sets the bounding Rectangle of this Rectangle to match the specified Rectangle.

This method is included for completeness, to parallel the setBounds method of Component.

Parameters

r:Rectangle: the specified Rectangle

setBounds back to summary

setBounds	back to summary
public void setBounds(int x, int y, int width, int height) Sets the bounding `Rectangle` of this `Rectangle` to the specified `x`, `y`, `width`, and `height`. This method is included for completeness, to parallel the `setBounds` method of `Component`. Parameters x:int the new X coordinate for the upper-left corner of this `Rectangle` y:int the new Y coordinate for the upper-left corner of this `Rectangle` width:int the new width for this `Rectangle` height:int the new height for this `Rectangle` See Also `getBounds`, `java.awt.Component#setBounds(int, int, int, int)`

public void setBounds(int x, int y, int width, int height)

Sets the bounding Rectangle of this Rectangle to the specified x, y, width, and height.

This method is included for completeness, to parallel the setBounds method of Component.

Parameters

x:int: the new X coordinate for the upper-left corner of this Rectangle
y:int: the new Y coordinate for the upper-left corner of this Rectangle
width:int: the new width for this Rectangle
height:int: the new height for this Rectangle

setBounds	back to summary
public void setBounds(BaseBounds b)

toRectBounds	back to summary
public RectBounds toRectBounds()

toString back to summary

toString	back to summary
public String toString() Overrides java.lang.Object.toString. Returns a `String` representing this `Rectangle` and its values. Returns:String a `String` representing this `Rectangle` object's coordinate and size values. Annotations @Override

public String toString()

Overrides java.lang.Object.toString.

Returns a String representing this Rectangle and its values.

Returns:String

a String representing this Rectangle object's coordinate and size values.

Annotations

@Override

translate back to summary

translate	back to summary
public void translate(int dx, int dy) Translates this `Rectangle` the indicated distance, to the right along the X coordinate axis, and downward along the Y coordinate axis. Parameters dx:int the distance to move this `Rectangle` along the X axis dy:int the distance to move this `Rectangle` along the Y axis See Also `java.awt.Rectangle#setLocation(int, int)`, `java.awt.Rectangle#setLocation(java.awt.Point)`

public void translate(int dx, int dy)

Translates this Rectangle the indicated distance, to the right along the X coordinate axis, and downward along the Y coordinate axis.

Parameters

dx:int: the distance to move this Rectangle along the X axis
dy:int: the distance to move this Rectangle along the Y axis

public Class Rectangle

Field Summary

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Method Summary

Field Detail

Constructor Detail

Method Detail