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Java Standard Edition (SE)

Rectangle


java.awt

Class Rectangle

    • Field Summary

      Fields 
      Modifier and Type Field and Description
      int height
      The height of the Rectangle.
      int width
      The width of the Rectangle.
      int x
      The X coordinate of the upper-left corner of the Rectangle.
      int y
      The Y coordinate of the upper-left corner of the Rectangle.
    • Constructor Summary

      Constructors 
      Constructor and Description
      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(Dimension d)
      Constructs a new Rectangle whose top left corner is (0, 0) and whose width and height are specified by the Dimension argument.
      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.
      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.
      Rectangle(Point p)
      Constructs a new Rectangle whose upper-left corner is the specified Point, and whose width and height are both zero.
      Rectangle(Point p, Dimension d)
      Constructs a new Rectangle whose upper-left corner is specified by the Point argument, and whose width and height are specified by the Dimension argument.
      Rectangle(Rectangle r)
      Constructs a new Rectangle, initialized to match the values of the specified Rectangle.
    • Constructor Detail

      • Rectangle

        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

        public Rectangle(Rectangle r)
        Constructs a new Rectangle, initialized to match the values of the specified Rectangle.
        Parameters:
        r - the Rectangle from which to copy initial values to a newly constructed Rectangle
        Since:
        1.1
      • 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 - the specified X coordinate
        y - the specified Y coordinate
        width - the width of the Rectangle
        height - the height of the Rectangle
        Since:
        1.0
      • 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 - the width of the Rectangle
        height - the height of the Rectangle
      • Rectangle

        public Rectangle(Point p,
                         Dimension d)
        Constructs a new Rectangle whose upper-left corner is specified by the Point argument, and whose width and height are specified by the Dimension argument.
        Parameters:
        p - a Point that is the upper-left corner of the Rectangle
        d - a Dimension, representing the width and height of the Rectangle
      • Rectangle

        public Rectangle(Point p)
        Constructs a new Rectangle whose upper-left corner is the specified Point, and whose width and height are both zero.
        Parameters:
        p - a Point that is the top left corner of the Rectangle
      • Rectangle

        public Rectangle(Dimension d)
        Constructs a new Rectangle whose top left corner is (0, 0) and whose width and height are specified by the Dimension argument.
        Parameters:
        d - a Dimension, specifying width and height
    • Method Detail

      • getX

        public double getX()
        Returns the X coordinate of the bounding Rectangle in double precision.
        Specified by:
        getX in class RectangularShape
        Returns:
        the X coordinate of the bounding Rectangle.
      • getY

        public double getY()
        Returns the Y coordinate of the bounding Rectangle in double precision.
        Specified by:
        getY in class RectangularShape
        Returns:
        the Y coordinate of the bounding Rectangle.
      • getWidth

        public double getWidth()
        Returns the width of the bounding Rectangle in double precision.
        Specified by:
        getWidth in class RectangularShape
        Returns:
        the width of the bounding Rectangle.
      • getHeight

        public double getHeight()
        Returns the height of the bounding Rectangle in double precision.
        Specified by:
        getHeight in class RectangularShape
        Returns:
        the height of the bounding Rectangle.
      • getBounds2D

        public Rectangle2D getBounds2D()
        Returns a high precision and more accurate bounding box of the Shape than the getBounds method. Note that there is no guarantee that the returned Rectangle2D is the smallest bounding box that encloses the Shape, only that the Shape lies entirely within the indicated Rectangle2D. The bounding box returned by this method is usually tighter than that returned by the getBounds method and never fails due to overflow problems since the return value can be an instance of the Rectangle2D that uses double precision values to store the dimensions.

        Note that the definition of insideness can lead to situations where points on the defining outline of the shape may not be considered contained in the returned bounds object, but only in cases where those points are also not considered contained in the original shape.

        If a point is inside the shape according to the contains(point) method, then it must be inside the returned Rectangle2D bounds object according to the contains(point) method of the bounds. Specifically:

        shape.contains(p) requires bounds.contains(p)

        If a point is not inside the shape, then it might still be contained in the bounds object:

        bounds.contains(p) does not imply shape.contains(p)

        Specified by:
        getBounds2D in interface Shape
        Overrides:
        getBounds2D in class Rectangle2D
        Returns:
        an instance of Rectangle2D that is a high-precision bounding box of the Shape.
        Since:
        1.2
        See Also:
        Shape.getBounds()
      • setBounds

        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 - the specified Rectangle
        Since:
        1.1
        See Also:
        getBounds(), Component.setBounds(java.awt.Rectangle)
      • setBounds

        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 - the new X coordinate for the upper-left corner of this Rectangle
        y - the new Y coordinate for the upper-left corner of this Rectangle
        width - the new width for this Rectangle
        height - the new height for this Rectangle
        Since:
        1.1
        See Also:
        getBounds(), Component.setBounds(int, int, int, int)
      • setRect

        public void setRect(double x,
                            double y,
                            double width,
                            double height)
        Sets the bounds of this Rectangle to the integer bounds which encompass the specified x, y, width, and height. If the parameters specify a Rectangle that exceeds the maximum range of integers, the result will be the best representation of the specified Rectangle intersected with the maximum integer bounds.
        Specified by:
        setRect in class Rectangle2D
        Parameters:
        x - the X coordinate of the upper-left corner of the specified rectangle
        y - the Y coordinate of the upper-left corner of the specified rectangle
        width - the width of the specified rectangle
        height - the new height of the specified rectangle
      • reshape

        @Deprecated
        public void reshape(int x,
                                        int y,
                                        int width,
                                        int height)
        Deprecated. As of JDK version 1.1, replaced by setBounds(int, int, int, int).
        Sets the bounding Rectangle of this Rectangle to the specified x, y, width, and height.

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

        public void setLocation(Point p)
        Moves this Rectangle to the specified location.

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

        Parameters:
        p - the Point specifying the new location for this Rectangle
        Since:
        1.1
        See Also:
        Component.setLocation(java.awt.Point), getLocation()
      • setLocation

        public void setLocation(int x,
                                int y)
        Moves this Rectangle to the specified location.

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

        Parameters:
        x - the X coordinate of the new location
        y - the Y coordinate of the new location
        Since:
        1.1
        See Also:
        getLocation(), Component.setLocation(int, int)
      • move

        @Deprecated
        public void move(int x,
                                     int y)
        Deprecated. As of JDK version 1.1, replaced by setLocation(int, int).
        Moves this Rectangle to the specified location.

        Parameters:
        x - the X coordinate of the new location
        y - the Y coordinate of the new location
      • translate

        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 - the distance to move this Rectangle along the X axis
        dy - the distance to move this Rectangle along the Y axis
        See Also:
        setLocation(int, int), setLocation(java.awt.Point)
      • getSize

        public Dimension getSize()
        Gets the size of this Rectangle, represented by the returned Dimension.

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

        Returns:
        a Dimension, representing the size of this Rectangle.
        Since:
        1.1
        See Also:
        Component.getSize(), setSize(Dimension), setSize(int, int)
      • setSize

        public void setSize(Dimension d)
        Sets the size of this Rectangle to match the specified Dimension.

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

        Parameters:
        d - the new size for the Dimension object
        Since:
        1.1
        See Also:
        Component.setSize(java.awt.Dimension), getSize()
      • setSize

        public void setSize(int width,
                            int height)
        Sets the size of this Rectangle to the specified width and height.

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

        Parameters:
        width - the new width for this Rectangle
        height - the new height for this Rectangle
        Since:
        1.1
        See Also:
        Component.setSize(int, int), getSize()
      • resize

        @Deprecated
        public void resize(int width,
                                       int height)
        Deprecated. As of JDK version 1.1, replaced by setSize(int, int).
        Sets the size of this Rectangle to the specified width and height.

        Parameters:
        width - the new width for this Rectangle
        height - the new height for this Rectangle
      • contains

        public boolean contains(Point p)
        Checks whether or not this Rectangle contains the specified Point.
        Parameters:
        p - the Point to test
        Returns:
        true if the specified Point is inside this Rectangle; false otherwise.
        Since:
        1.1
      • contains

        public boolean contains(int x,
                                int y)
        Checks whether or not this Rectangle contains the point at the specified location (x,y).
        Parameters:
        x - the specified X coordinate
        y - the specified Y coordinate
        Returns:
        true if the point (x,y) is inside this Rectangle; false otherwise.
        Since:
        1.1
      • contains

        public boolean contains(Rectangle r)
        Checks whether or not this Rectangle entirely contains the specified Rectangle.
        Parameters:
        r - the specified Rectangle
        Returns:
        true if the Rectangle is contained entirely inside this Rectangle; false otherwise
        Since:
        1.2
      • contains

        public boolean contains(int X,
                                int Y,
                                int W,
                                int H)
        Checks whether this Rectangle entirely contains the Rectangle at the specified location (X,Y) with the specified dimensions (W,H).
        Parameters:
        X - the specified X coordinate
        Y - the specified Y coordinate
        W - the width of the Rectangle
        H - the height of the Rectangle
        Returns:
        true if the Rectangle specified by (X, Y, W, H) is entirely enclosed inside this Rectangle; false otherwise.
        Since:
        1.1
      • inside

        @Deprecated
        public boolean inside(int X,
                                          int Y)
        Deprecated. As of JDK version 1.1, replaced by contains(int, int).
        Checks whether or not this Rectangle contains the point at the specified location (X,Y).
        Parameters:
        X - the specified X coordinate
        Y - the specified Y coordinate
        Returns:
        true if the point (X,Y) is inside this Rectangle; false otherwise.
      • intersects

        public boolean intersects(Rectangle r)
        Determines whether or not this Rectangle and the specified Rectangle intersect. Two rectangles intersect if their intersection is nonempty.
        Parameters:
        r - the specified Rectangle
        Returns:
        true if the specified Rectangle and this Rectangle intersect; false otherwise.
      • intersection

        public Rectangle intersection(Rectangle r)
        Computes the intersection of this Rectangle with the specified Rectangle. Returns a new Rectangle that represents the intersection of the two rectangles. If the two rectangles do not intersect, the result will be an empty rectangle.
        Parameters:
        r - the specified Rectangle
        Returns:
        the largest Rectangle contained in both the specified Rectangle and in this Rectangle; or if the rectangles do not intersect, an empty rectangle.
      • union

        public Rectangle union(Rectangle r)
        Computes the union of this Rectangle with the specified Rectangle. Returns a new Rectangle that represents the union of the two rectangles.

        If either Rectangle has any dimension less than zero the rules for non-existant rectangles apply. If only one has a dimension less than zero, then the result will be a copy of the other Rectangle. If both have dimension less than zero, then the result will have at least one dimension less than zero.

        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 - the specified Rectangle
        Returns:
        the smallest Rectangle containing both the specified Rectangle and this Rectangle.
      • add

        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 - the X coordinate of the new point
        newy - the Y coordinate of the new point
      • add

        public void add(Point pt)
        Adds the specified Point 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 coordinates of the specified Point 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(pt.x, pt.y, 1, 1);
         
        Parameters:
        pt - the new Point to add to this Rectangle
      • add

        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 - the specified Rectangle
      • grow

        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 - the horizontal expansion
        v - the vertical expansion
      • isEmpty

        public boolean isEmpty()
        Determines whether the RectangularShape is empty. When the RectangularShape is empty, it encloses no area.
        Specified by:
        isEmpty in class RectangularShape
        Returns:
        true if the RectangularShape is empty; false otherwise.
        Since:
        1.2
      • outcode

        public int outcode(double x,
                           double y)
        Determines where the specified coordinates lie with respect to this Rectangle2D. This method computes a binary OR of the appropriate mask values indicating, for each side of this Rectangle2D, whether or not the specified coordinates are on the same side of the edge as the rest of this Rectangle2D.
        Specified by:
        outcode in class Rectangle2D
        Parameters:
        x - the specified X coordinate
        y - the specified Y coordinate
        Returns:
        the logical OR of all appropriate out codes.
        Since:
        1.2
        See Also:
        Rectangle2D.OUT_LEFT, Rectangle2D.OUT_TOP, Rectangle2D.OUT_RIGHT, Rectangle2D.OUT_BOTTOM
      • createIntersection

        public Rectangle2D createIntersection(Rectangle2D r)
        Returns a new Rectangle2D object representing the intersection of this Rectangle2D with the specified Rectangle2D.
        Specified by:
        createIntersection in class Rectangle2D
        Parameters:
        r - the Rectangle2D to be intersected with this Rectangle2D
        Returns:
        the largest Rectangle2D contained in both the specified Rectangle2D and in this Rectangle2D.
        Since:
        1.2
      • createUnion

        public Rectangle2D createUnion(Rectangle2D r)
        Returns a new Rectangle2D object representing the union of this Rectangle2D with the specified Rectangle2D.
        Specified by:
        createUnion in class Rectangle2D
        Parameters:
        r - the Rectangle2D to be combined with this Rectangle2D
        Returns:
        the smallest Rectangle2D containing both the specified Rectangle2D and this Rectangle2D.
        Since:
        1.2
      • equals

        public boolean equals(Object obj)
        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.

        Overrides:
        equals in class Rectangle2D
        Parameters:
        obj - the Object to compare with this Rectangle
        Returns:
        true if the objects are equal; false otherwise.
        See Also:
        Object.hashCode(), HashMap
      • toString

        public String toString()
        Returns a String representing this Rectangle and its values.
        Overrides:
        toString in class Object
        Returns:
        a String representing this Rectangle object's coordinate and size values.


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