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Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class Dimension - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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java.awt
Class Dimension

java.lang.Object
  |
  +--java.awt.geom.Dimension2D
        |
        +--java.awt.Dimension

Direct Known Subclasses:

DimensionUIResource

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public class Dimension

extends Dimension2D

implements Serializable

The Dimension class encapsulates the width and height of a component (in integer precision) in a single object. The class is associated with certain properties of components. Several methods defined by the Component class and the LayoutManager interface return a Dimension object.

Normally the values of width and height are non-negative integers. The constructors that allow you to create a dimension do not prevent you from setting a negative value for these properties. If the value of width or height is negative, the behavior of some methods defined by other objects is undefined.

Since:

JDK1.0

See Also:

Component, LayoutManager, Serialized Form

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Field Summary
int	height           The height dimension.
int	width           The width dimension.

 

Constructor Summary

Dimension()           Creates an instance of Dimension with a width of zero and a height of zero.

Dimension(Dimension d)           Creates an instance of Dimension whose width and height are the same as for the specified dimension.

Dimension(int width, int height)           Constructs a Dimension and initializes it to the specified width and specified height.

 

Method Summary
boolean	equals(Object obj)           Checks whether two dimension objects have equal values.
double	getHeight()           Returns the height of this dimension in double precision.
Dimension	getSize()           Gets the size of this Dimension object.
double	getWidth()           Returns the width of this dimension in double precision.
void	setSize(Dimension d)           Set the size of this Dimension object to the specified size.
void	setSize(double width, double height)           Set the size of this Dimension object to the specified width and height in double precision.
void	setSize(int width, int height)           Set the size of this Dimension object to the specified width and height.
String	toString()           Returns a string representation of the values of this Dimension object's height and width fields.

 

Methods inherited from class java.awt.geom.Dimension2D

clone, setSize

 

Methods inherited from class java.lang.Object

finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

 

Field Detail

width

public int width

The width dimension. Negative values can be used.

See Also:

getSize(), setSize()

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height

public int height

The height dimension. Negative values can be used.

See Also:

getSize(), setSize()

Constructor Detail

Dimension

public Dimension()

Creates an instance of Dimension with a width of zero and a height of zero.

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Dimension

public Dimension(Dimension d)

Creates an instance of Dimension whose width and height are the same as for the specified dimension.

Parameters:

d - the specified dimension for the width and height values.

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Dimension

public Dimension(int width,
                 int height)

Constructs a Dimension and initializes it to the specified width and specified height.

Parameters:

width - the specified width dimension

height - the specified height dimension

Method Detail

getWidth

public double getWidth()

Returns the width of this dimension in double precision.

Overrides:

getWidth in class Dimension2D

Tags copied from class: Dimension2D

Returns:

the width of this Dimension.

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getHeight

public double getHeight()

Returns the height of this dimension in double precision.

Overrides:

getHeight in class Dimension2D

Tags copied from class: Dimension2D

Returns:

the height of this Dimension.

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setSize

public void setSize(double width,
                    double height)

Set the size of this Dimension object to the specified width and height in double precision.

Overrides:

setSize in class Dimension2D

Parameters:

width - the new width for the Dimension object

height - the new height for the Dimension object

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getSize

public Dimension getSize()

Gets the size of this Dimension object. This method is included for completeness, to parallel the getSize method defined by Component.

Returns:

the size of this dimension, a new instance of Dimension with the same width and height.

Since:

JDK1.1

See Also:

setSize(double, double), Component.getSize()

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setSize

public void setSize(Dimension d)

Set the size of this Dimension object to the specified size. This method is included for completeness, to parallel the setSize method defined by Component.

Parameters:

d - the new size for this Dimension object.

Since:

JDK1.1

See Also:

getSize(), Component.setSize(int, int)

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setSize

public void setSize(int width,
                    int height)

Set the size of this Dimension object to the specified width and height. This method is included for completeness, to parallel the setSize method defined by Component.

Parameters:

width - the new width for this Dimension object.

height - the new height for this Dimension object.

Since:

JDK1.1

See Also:

getSize(), Component.setSize(int, int)

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equals

public boolean equals(Object obj)

Checks whether two dimension objects have equal values.

Overrides:

equals in class Object

Tags copied from class: Object

Parameters:

obj - the reference object with which to compare.

Returns:

true if this object is the same as the obj argument; false otherwise.

See Also:

Boolean.hashCode(), Hashtable

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toString

public String toString()

Returns a string representation of the values of this Dimension object's height and width fields. This method is intended to be used only for debugging purposes, and the content and format of the returned string may vary between implementations. The returned string may be empty but may not be null.

Overrides:

toString in class Object

Returns:

a string representation of this Dimension object.

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