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Java™ Platform Standard Ed. 6 |
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java.lang.Object java.awt.DisplayMode
public final class DisplayMode
The DisplayMode
class encapsulates the bit depth, height,
width, and refresh rate of a GraphicsDevice
. The ability to
change graphics device's display mode is platform- and
configuration-dependent and may not always be available
(see GraphicsDevice.isDisplayChangeSupported()
).
For more information on full-screen exclusive mode API, see the Full-Screen Exclusive Mode API Tutorial.
GraphicsDevice
,
GraphicsDevice.isDisplayChangeSupported()
,
GraphicsDevice.getDisplayModes()
,
GraphicsDevice.setDisplayMode(java.awt.DisplayMode)
Field Summary | |
---|---|
static int |
BIT_DEPTH_MULTI
Value of the bit depth if multiple bit depths are supported in this display mode. |
static int |
REFRESH_RATE_UNKNOWN
Value of the refresh rate if not known. |
Constructor Summary | |
---|---|
DisplayMode(int width,
int height,
int bitDepth,
int refreshRate)
Create a new display mode object with the supplied parameters. |
Method Summary | |
---|---|
boolean |
equals(DisplayMode dm)
Returns whether the two display modes are equal. |
boolean |
equals(Object dm)
Indicates whether some other object is "equal to" this one. |
int |
getBitDepth()
Returns the bit depth of the display, in bits per pixel. |
int |
getHeight()
Returns the height of the display, in pixels. |
int |
getRefreshRate()
Returns the refresh rate of the display, in hertz. |
int |
getWidth()
Returns the width of the display, in pixels. |
int |
hashCode()
Returns a hash code value for the object. |
Methods inherited from class java.lang.Object |
---|
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
public static final int BIT_DEPTH_MULTI
getBitDepth()
,
Constant Field Valuespublic static final int REFRESH_RATE_UNKNOWN
getRefreshRate()
,
Constant Field ValuesConstructor Detail |
---|
public DisplayMode(int width, int height, int bitDepth, int refreshRate)
width
- the width of the display, in pixelsheight
- the height of the display, in pixelsbitDepth
- the bit depth of the display, in bits per
pixel. This can be BIT_DEPTH_MULTI
if multiple
bit depths are available.refreshRate
- the refresh rate of the display, in hertz.
This can be REFRESH_RATE_UNKNOWN
if the
information is not available.BIT_DEPTH_MULTI
,
REFRESH_RATE_UNKNOWN
Method Detail |
---|
public int getHeight()
public int getWidth()
public int getBitDepth()
BIT_DEPTH_MULTI
if multiple bit depths are supported in
this display mode.
BIT_DEPTH_MULTI
public int getRefreshRate()
REFRESH_RATE_UNKNOWN
if the information is not available.
REFRESH_RATE_UNKNOWN
public boolean equals(DisplayMode dm)
public boolean equals(Object dm)
The equals
method implements an equivalence relation
on non-null object references:
x
, x.equals(x)
should return
true
.
x
and y
, x.equals(y)
should return true
if and only if
y.equals(x)
returns true
.
x
, y
, and z
, if
x.equals(y)
returns true
and
y.equals(z)
returns true
, then
x.equals(z)
should return true
.
x
and y
, multiple invocations of
x.equals(y) consistently return true
or consistently return false
, provided no
information used in equals
comparisons on the
objects is modified.
x
,
x.equals(null)
should return false
.
The equals method for class Object
implements
the most discriminating possible equivalence relation on objects;
that is, for any non-null reference values x
and
y
, this method returns true
if and only
if x
and y
refer to the same object
(x == y
has the value true
).
Note that it is generally necessary to override the hashCode method whenever this method is overridden, so as to maintain the general contract for the hashCode method, which states that equal objects must have equal hash codes.
equals
in class Object
dm
- the reference object with which to compare.
true
if this object is the same as the obj
argument; false
otherwise.Object.hashCode()
,
Hashtable
public int hashCode()
java.util.Hashtable
.
The general contract of hashCode
is:
hashCode
method on each of
the two objects must produce the same integer result.
Object.equals(java.lang.Object)
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 hashtables.
As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the JavaTM programming language.)
hashCode
in class Object
Object.equals(java.lang.Object)
,
Hashtable
|
Java™ Platform Standard Ed. 6 |
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