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java.lang.Object | +----java.awt.Rectangle
A rectangle's width and height are
public fields. The constructors that allow you to create a
rectangle, and the methods that allow you to modify one, do not
prevent you from setting a negative value for width or height.
A rectangle whose width or height is negative is considered
empty, and all methods defined by the Rectangle class
behave accordingly. If the rectangle is empty, then the method
isEmpty returns true. No point can be
contained by or inside an empty rectangle, however the values of
width and height are still valid. An
empty rectangle still has a location in the coordinate space, and
methods that change its size or location remain valid. The
behavior of methods that operate on more than one rectangle is
undefined if any of the participating rectangles has a negative
width or height. These methods include
intersects, intersection, and
union.
height
width
x
y
Rectangle()
Rectangle(Dimension)
dimension argument.
Rectangle(int, int)
Rectangle(int, int, int, int)
x, y) and whose width and height
are specified by the arguments of the same name.
Rectangle(Point)
Rectangle(Point, Dimension)
point argument, and whose width and height
are specified by the dimension argument.
Rectangle(Rectangle)
add(int, int)
newx
and newy, to this rectangle.
add(Point)
pt to this rectangle.
add(Rectangle)
contains(int, int)
contains(Point)
equals(Object)
getBounds()
getLocation()
getSize()
grow(int, int)
hashCode()
inside(int, int)
intersection(Rectangle)
intersects(Rectangle)
isEmpty()
move(int, int)
reshape(int, int, int, int)
resize(int, int)
setBounds(int, int, int, int)
x, y, width,
and height.
setBounds(Rectangle)
setLocation(int, int)
setLocation(Point)
setSize(Dimension)
setSize(int, int)
toString()
translate(int, int)
union(Rectangle)
x
public int x
y
public int y
width
public int width
height
public int height
Rectangle
public Rectangle()
Rectangle
public Rectangle(Rectangle r)
Rectangle
public Rectangle(int x,
int y,
int width,
int height)
x, y) and whose width and height
are specified by the arguments of the same name.
Rectangle
public Rectangle(int width,
int height)
Rectangle
public Rectangle(Point p,
Dimension d)
point argument, and whose width and height
are specified by the dimension argument.
Rectangle
public Rectangle(Point p)
Rectangle
public Rectangle(Dimension d)
dimension argument.
getBounds
public Rectangle getBounds()
This method is included for completeness, to parallel the
getBounds method of Component.
setBounds
public void setBounds(Rectangle r)
This method is included for completeness, to parallel the
setBounds method of Component.
setBounds
public void setBounds(int x,
int y,
int width,
int height)
x, y, width,
and height.
This method is included for completeness, to parallel the
setBounds method of Component.
reshape
public void reshape(int x,
int y,
int width,
int height)
setBounds(int, int, int, int).
getLocation
public Point getLocation()
This method is included for completeness, to parallel the
getLocation method of Component.
setLocation
public void setLocation(Point p)
This method is included for completeness, to parallel the
setLocation method of Component.
setLocation
public void setLocation(int x,
int y)
This method is included for completeness, to parallel the
setLocation method of Component.
move
public void move(int x,
int y)
setLocation(int, int).
translate
public void translate(int x,
int y)
getSize
public Dimension getSize()
This method is included for completeness, to parallel the
getSize method of Component.
setSize
public void setSize(Dimension d)
This method is included for completeness, to parallel the
setSize method of Component.
setSize
public void setSize(int width,
int height)
This method is included for completeness, to parallel the
setSize method of Component.
resize
public void resize(int width,
int height)
setSize(int, int).
contains
public boolean contains(Point p)
true if the point
(x, y) is inside this rectangle;
false otherwise.
contains
public boolean contains(int x,
int y)
true if the point
(x, y) is inside this rectangle;
false otherwise.
inside
public boolean inside(int x,
int y)
contains(int, int).
intersects
public boolean intersects(Rectangle r)
true if the specified rectangle
and this rectangle insersect;
false otherwise.
intersection
public Rectangle intersection(Rectangle r)
union
public Rectangle union(Rectangle r)
add
public void add(int newx,
int newy)
newx
and newy, to this rectangle. The resulting rectangle is
the smallest rectangle that contains both the original rectangle
and the specified point.
After adding a point, a call to
contains with the
added point as an argument will 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 left or bottom edge of the enlarged rectangle,
contains will return false for that point.
add
public void add(Point pt)
pt to this rectangle. The resulting
rectangle is the smallest rectangle that contains both the
original rectangle and the specified point.
After adding a point, a call to
contains with the
added point as an argument will 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 left or bottom edge of the enlarged rectangle,
contains will return false for that point.
add
public void add(Rectangle r)
grow
public void grow(int h,
int v)
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 top-left corner, a
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 does not check whether the resulting
values of width and height are
non-negative.
isEmpty
public boolean isEmpty()
true if this rectangle is empty;
false otherwise.
hashCode
public int hashCode()
equals
public boolean equals(Object obj)
The result is true if and only if the argument is not null and is a Rectangle object that has the same top-left corner, width, and height as this rectangle.
true if the objects are equal;
false otherwise.
toString
public String toString()
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