# 2d Rectangle

Volume of a Rectangle Calculator. A Rectangular box is a geometrical figure bounded by six quadrilateral faces. The shape is also known as the rectangular cuboid, right cuboid, rectangular hexahedron, right rectangular prism, or rectangular parallelepiped. The volume of a rectangular box is the amount of space occupied by the object. Hello everyone,For this tutorial video, I would like to demonstrate the perimeter and area of a rectangle graphically, exactly like how I did with the square.

- Class

## Class Rectangle2D

- java.awt.geom.Rectangle2D

- All Implemented Interfaces:
- Shape, Cloneable

- Direct Known Subclasses:
- Rectangle, Rectangle2D.Double, Rectangle2D.Float

The`Rectangle2D`

class describes a rectangle defined by a location`(x,y)`

and dimension`(w x h)`

.This class is only the abstract superclass for all objects that store a 2D rectangle. The actual storage representation of the coordinates is left to the subclass.

- Since:
- 1.2

### Nested Class Summary

Nested Classes Modifier and Type Class and Description `static class`

**Rectangle2D.Double**The`Double`

class defines a rectangle specified in double coordinates.`static class`

**Rectangle2D.Float**The`Float`

class defines a rectangle specified in float coordinates.

### Field Summary

Fields Modifier and Type Field and Description `static int`

**OUT_BOTTOM**The bitmask that indicates that a point lies below this`Rectangle2D`

.`static int`

**OUT_LEFT**The bitmask that indicates that a point lies to the left of this`Rectangle2D`

.`static int`

**OUT_RIGHT**The bitmask that indicates that a point lies to the right of this`Rectangle2D`

.`static int`

**OUT_TOP**The bitmask that indicates that a point lies above this`Rectangle2D`

.

### Constructor Summary

Constructors Modifier Constructor and Description `protected`

**Rectangle2D**()This is an abstract class that cannot be instantiated directly.

### Method Summary

Methods Modifier and Type Method and Description `void`

**add**(double newx, double newy)Adds a point, specified by the double precision arguments`newx`

and`newy`

, to this`Rectangle2D`

.`void`

**add**(Point2D pt)`void`

**add**(Rectangle2D r)Adds a`Rectangle2D`

object to this`Rectangle2D`

.`boolean`

**contains**(double x, double y)Tests if the specified coordinates are inside the boundary of the`Shape`

, as described by the definition of insideness.`boolean`

**contains**(double x, double y, double w, double h)Tests if the interior of the`Shape`

entirely contains the specified rectangular area.`abstract Rectangle2D`

**createIntersection**(Rectangle2D r)Returns a new`Rectangle2D`

object representing the intersection of this`Rectangle2D`

with the specified`Rectangle2D`

.`abstract Rectangle2D`

**createUnion**(Rectangle2D r)Returns a new`Rectangle2D`

object representing the union of this`Rectangle2D`

with the specified`Rectangle2D`

.`boolean`

**equals**(Object obj)Determines whether or not the specified`Object`

is equal to this`Rectangle2D`

.`Rectangle2D`

**getBounds2D**()Returns a high precision and more accurate bounding box of the`Shape`

than the`getBounds`

method.`PathIterator`

**getPathIterator**(AffineTransform at)Returns an iteration object that defines the boundary of this`Rectangle2D`

.`PathIterator`

**getPathIterator**(AffineTransform at, double flatness)Returns an iteration object that defines the boundary of the flattened`Rectangle2D`

.`int`

**hashCode**()`static void`

**intersect**(Rectangle2D src1, Rectangle2D src2, Rectangle2D dest)Intersects the pair of specified source`Rectangle2D`

objects and puts the result into the specified destination`Rectangle2D`

object.`boolean`

**intersects**(double x, double y, double w, double h)Tests if the interior of the`Shape`

intersects the interior of a specified rectangular area.`boolean`

**intersectsLine**(double x1, double y1, double x2, double y2)Tests if the specified line segment intersects the interior of this`Rectangle2D`

.`boolean`

**intersectsLine**(Line2D l)Tests if the specified line segment intersects the interior of this`Rectangle2D`

.`abstract int`

**outcode**(double x, double y)Determines where the specified coordinates lie with respect to this`Rectangle2D`

.`int`

**outcode**(Point2D p)Determines where the specified`Point2D`

lies with respect to this`Rectangle2D`

.`void`

**setFrame**(double x, double y, double w, double h)Sets the location and size of the outer bounds of this`Rectangle2D`

to the specified rectangular values.`abstract void`

**setRect**(double x, double y, double w, double h)Sets the location and size of this`Rectangle2D`

to the specified`double`

values.`void`

**setRect**(Rectangle2D r)Sets this`Rectangle2D`

to be the same as the specified`Rectangle2D`

.`static void`

**union**(Rectangle2D src1, Rectangle2D src2, Rectangle2D dest)Unions the pair of source`Rectangle2D`

objects and puts the result into the specified destination`Rectangle2D`

object.### Methods inherited from class java.awt.geom.RectangularShape

`clone, contains, contains, getBounds, getCenterX, getCenterY, getFrame, getHeight, getMaxX, getMaxY, getMinX, getMinY, getWidth, getX, getY, intersects, isEmpty, setFrame, setFrame, setFrameFromCenter, setFrameFromCenter, setFrameFromDiagonal, setFrameFromDiagonal`

### Methods inherited from class java.lang.Object

`finalize, getClass, notify, notifyAll, toString, wait, wait, wait`

## Holo 2d Rectangle

### Field Detail

#### OUT_LEFT

The bitmask that indicates that a point lies to the left of this`Rectangle2D`

.- Since:
- 1.2
- See Also:
- Constant Field Values

#### OUT_TOP

The bitmask that indicates that a point lies above this`Rectangle2D`

.- Since:
- 1.2
- See Also:
- Constant Field Values

#### OUT_RIGHT

The bitmask that indicates that a point lies to the right of this`Rectangle2D`

.- Since:
- 1.2
- See Also:
- Constant Field Values

#### OUT_BOTTOM

The bitmask that indicates that a point lies below this`Rectangle2D`

.- Since:
- 1.2
- See Also:
- Constant Field Values

### Constructor Detail

#### Rectangle2D

This is an abstract class that cannot be instantiated directly. Type-specific implementation subclasses are available for instantiation and provide a number of formats for storing the information necessary to satisfy the various accessor methods below.- Since:
- 1.2
- See Also:
`Rectangle2D.Float`

,`Rectangle2D.Double`

,`Rectangle`

### Method Detail

#### setRect

Sets the location and size of this`Rectangle2D`

to the specified`double`

values.- Parameters:
`x`

- the X coordinate of the upper-left corner of this`Rectangle2D`

`y`

- the Y coordinate of the upper-left corner of this`Rectangle2D`

`w`

- the width of this`Rectangle2D`

`h`

- the height of this`Rectangle2D`

- Since:
- 1.2

#### setRect

Sets this`Rectangle2D`

to be the same as the specified`Rectangle2D`

.- Parameters:
`r`

- the specified`Rectangle2D`

- Since:
- 1.2

#### intersectsLine

Tests if the specified line segment intersects the interior of this`Rectangle2D`

.- Parameters:
`x1`

- the X coordinate of the start point of the specified line segment`y1`

- the Y coordinate of the start point of the specified line segment`x2`

- the X coordinate of the end point of the specified line segment`y2`

- the Y coordinate of the end point of the specified line segment- Returns:
`true`

if the specified line segment intersects the interior of this`Rectangle2D`

;`false`

otherwise.- Since:
- 1.2

#### intersectsLine

Tests if the specified line segment intersects the interior of this`Rectangle2D`

.- Parameters:
`l`

- the specified`Line2D`

to test for intersection with the interior of this`Rectangle2D`

- Returns:
`true`

if the specified`Line2D`

intersects the interior of this`Rectangle2D`

;`false`

otherwise.- Since:
- 1.2

#### outcode

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`

.- 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:
`OUT_LEFT`

,`OUT_TOP`

,`OUT_RIGHT`

,`OUT_BOTTOM`

#### outcode

Determines where the specified`Point2D`

lies 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`Point2D`

is on the same side of the edge as the rest of this`Rectangle2D`

.- Parameters:
`p`

- the specified`Point2D`

- Returns:
- the logical OR of all appropriate out codes.
- Since:
- 1.2
- See Also:
`OUT_LEFT`

,`OUT_TOP`

,`OUT_RIGHT`

,`OUT_BOTTOM`

#### setFrame

Sets the location and size of the outer bounds of this`Rectangle2D`

to the specified rectangular values.**Specified by:**`setFrame`

in class`RectangularShape`

- Parameters:
`x`

- the X coordinate of the upper-left corner of this`Rectangle2D`

`y`

- the Y coordinate of the upper-left corner of this`Rectangle2D`

`w`

- the width of this`Rectangle2D`

`h`

- the height of this`Rectangle2D`

- Since:
- 1.2
- See Also:
`RectangularShape.getFrame()`

#### 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)`

- Returns:
- an instance of
`Rectangle2D`

that is a high-precision bounding box of the`Shape`

. - Since:
- 1.2
- See Also:
`Shape.getBounds()`

#### contains

Tests if the specified coordinates are inside the boundary of the`Shape`

, as described by the definition of insideness.- Parameters:
`x`

- the specified X coordinate to be tested`y`

- the specified Y coordinate to be tested- Returns:
`true`

if the specified coordinates are inside the`Shape`

boundary;`false`

otherwise.- Since:
- 1.2

#### intersects

Tests if the interior of the`Shape`

intersects the interior of a specified rectangular area. The rectangular area is considered to intersect the`Shape`

if any point is contained in both the interior of the`Shape`

and the specified rectangular area.The

`Shape.intersects()`

method allows a`Shape`

implementation to conservatively return`true`

when:- there is a high probability that the rectangular area and the
`Shape`

intersect, but - the calculations to accurately determine this intersection are prohibitively expensive.

`Shapes`

this method might return`true`

even though the rectangular area does not intersect the`Shape`

. The`Area`

class performs more accurate computations of geometric intersection than most`Shape`

objects and therefore can be used if a more precise answer is required.- Parameters:
`x`

- the X coordinate of the upper-left corner of the specified rectangular area`y`

- the Y coordinate of the upper-left corner of the specified rectangular area`w`

- the width of the specified rectangular area`h`

- the height of the specified rectangular area- Returns:
`true`

if the interior of the`Shape`

and the interior of the rectangular area intersect, or are both highly likely to intersect and intersection calculations would be too expensive to perform;`false`

otherwise.- Since:
- 1.2
- See Also:
`Area`

- there is a high probability that the rectangular area and the

#### contains

Tests if the interior of the`Shape`

entirely contains the specified rectangular area. All coordinates that lie inside the rectangular area must lie within the`Shape`

for the entire rectanglar area to be considered contained within the`Shape`

.The

`Shape.contains()`

method allows a`Shape`

implementation to conservatively return`false`

when:- the
`intersect`

method returns`true`

and - the calculations to determine whether or not the
`Shape`

entirely contains the rectangular area are prohibitively expensive.

`Shapes`

this method might return`false`

even though the`Shape`

contains the rectangular area. The`Area`

class performs more accurate geometric computations than most`Shape`

objects and therefore can be used if a more precise answer is required.- Parameters:
`x`

- the X coordinate of the upper-left corner of the specified rectangular area`y`

- the Y coordinate of the upper-left corner of the specified rectangular area`w`

- the width of the specified rectangular area`h`

- the height of the specified rectangular area- Returns:
`true`

if the interior of the`Shape`

entirely contains the specified rectangular area;`false`

otherwise or, if the`Shape`

contains the rectangular area and the`intersects`

method returns`true`

and the containment calculations would be too expensive to perform.- Since:
- 1.2
- See Also:
`Area`

,`Shape.intersects(double, double, double, double)`

- the

#### createIntersection

Returns a new`Rectangle2D`

object representing the intersection of this`Rectangle2D`

with the specified`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

#### intersect

Intersects the pair of specified source`Rectangle2D`

objects and puts the result into the specified destination`Rectangle2D`

object. One of the source rectangles can also be the destination to avoid creating a third Rectangle2D object, but in this case the original points of this source rectangle will be overwritten by this method.- Parameters:
`src1`

- the first of a pair of`Rectangle2D`

objects to be intersected with each other`src2`

- the second of a pair of`Rectangle2D`

objects to be intersected with each other`dest`

- the`Rectangle2D`

that holds the results of the intersection of`src1`

and`src2`

- Since:
- 1.2

#### createUnion

Returns a new`Rectangle2D`

object representing the union of this`Rectangle2D`

with the specified`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

#### union

Unions the pair of source`Rectangle2D`

objects and puts the result into the specified destination`Rectangle2D`

object. One of the source rectangles can also be the destination to avoid creating a third Rectangle2D object, but in this case the original points of this source rectangle will be overwritten by this method.- Parameters:
`src1`

- the first of a pair of`Rectangle2D`

objects to be combined with each other`src2`

- the second of a pair of`Rectangle2D`

objects to be combined with each other`dest`

- the`Rectangle2D`

that holds the results of the union of`src1`

and`src2`

- Since:
- 1.2

#### add

Adds a point, specified by the double precision arguments`newx`

and`newy`

, to this`Rectangle2D`

. The resulting`Rectangle2D`

is the smallest`Rectangle2D`

that contains both the original`Rectangle2D`

and the specified point.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 left or bottom edge of the enlarged rectangle,`contains`

returns`false`

for that point.- Parameters:
`newx`

- the X coordinate of the new point`newy`

- the Y coordinate of the new point- Since:
- 1.2

#### add

Adds the`Point2D`

object`pt`

to this`Rectangle2D`

. The resulting`Rectangle2D`

is the smallest`Rectangle2D`

that contains both the original`Rectangle2D`

and the specified`Point2D`

.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 left or bottom edge of the enlarged rectangle,`contains`

returns`false`

for that point.- Parameters:
`pt`

- the new`Point2D`

to add to this`Rectangle2D`

.- Since:
- 1.2

#### add

Adds a`Rectangle2D`

object to this`Rectangle2D`

. The resulting`Rectangle2D`

is the union of the two`Rectangle2D`

objects.- Parameters:
`r`

- the`Rectangle2D`

to add to this`Rectangle2D`

.- Since:
- 1.2

#### getPathIterator

Returns an iteration object that defines the boundary of this`Rectangle2D`

. The iterator for this class is multi-threaded safe, which means that this`Rectangle2D`

class guarantees that modifications to the geometry of this`Rectangle2D`

object do not affect any iterations of that geometry that are already in process.- Parameters:
`at`

- an optional`AffineTransform`

to be applied to the coordinates as they are returned in the iteration, or`null`

if untransformed coordinates are desired- Returns:
- the
`PathIterator`

object that returns the geometry of the outline of this`Rectangle2D`

, one segment at a time. - Since:
- 1.2

#### getPathIterator

Returns an iteration object that defines the boundary of the flattened`Rectangle2D`

. Since rectangles are already flat, the`flatness`

parameter is ignored. The iterator for this class is multi-threaded safe, which means that this`Rectangle2D`

class guarantees that modifications to the geometry of this`Rectangle2D`

object do not affect any iterations of that geometry that are already in process.**Specified by:**`getPathIterator`

in interface`Shape`

**Overrides:**`getPathIterator`

in class`RectangularShape`

- Parameters:
`at`

- an optional`AffineTransform`

to be applied to the coordinates as they are returned in the iteration, or`null`

if untransformed coordinates are desired`flatness`

- the maximum distance that the line segments used to approximate the curved segments are allowed to deviate from any point on the original curve. Since rectangles are already flat, the`flatness`

parameter is ignored.- Returns:
- the
`PathIterator`

object that returns the geometry of the outline of this`Rectangle2D`

, one segment at a time. - Since:
- 1.2

#### hashCode

**Overrides:**`hashCode`

in class`Object`

- Returns:
- the hashcode for this
`Rectangle2D`

. - Since:
- 1.2
- See Also:
`Object.equals(java.lang.Object)`

,`System.identityHashCode(java.lang.Object)`

#### equals

Determines whether or not the specified`Object`

is equal to this`Rectangle2D`

. The specified`Object`

is equal to this`Rectangle2D`

if it is an instance of`Rectangle2D`

and if its location and size are the same as this`Rectangle2D`

.**Overrides:**`equals`

in class`Object`

- Parameters:
`obj`

- an`Object`

to be compared with this`Rectangle2D`

.- Returns:
`true`

if`obj`

is an instance of`Rectangle2D`

and has the same values;`false`

otherwise.- Since:
- 1.2
- See Also:
`Object.hashCode()`

,`HashMap`

- Class

## 2d Rectangle Area Formula

- Summary:
- Nested
- Field
- Constr

- Detail:
- Field
- Constr

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