- java.lang.Object
-
- java.awt.DisplayMode
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public final class DisplayMode extends Object
TheDisplayMode
class encapsulates the bit depth, height, width, and refresh rate of aGraphicsDevice
. The ability to change graphics device's display mode is platform- and configuration-dependent and may not always be available (seeGraphicsDevice.isDisplayChangeSupported()
).For more information on full-screen exclusive mode API, see the Full-Screen Exclusive Mode API Tutorial.
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-
Field Summary
Fields Modifier and Type Field and Description 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.
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Constructor Summary
Constructors Constructor and Description DisplayMode(int width, int height, int bitDepth, int refreshRate)
Create a new display mode object with the supplied parameters.
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Method Summary
Methods Modifier and Type Method and Description 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.
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Field Detail
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BIT_DEPTH_MULTI
public static final int BIT_DEPTH_MULTI
Value of the bit depth if multiple bit depths are supported in this display mode.- See Also:
getBitDepth()
, Constant Field Values
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REFRESH_RATE_UNKNOWN
public static final int REFRESH_RATE_UNKNOWN
Value of the refresh rate if not known.- See Also:
getRefreshRate()
, Constant Field Values
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Constructor Detail
-
DisplayMode
public DisplayMode(int width, int height, int bitDepth, int refreshRate)
Create a new display mode object with the supplied parameters.- Parameters:
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 beBIT_DEPTH_MULTI
if multiple bit depths are available.refreshRate
- the refresh rate of the display, in hertz. This can beREFRESH_RATE_UNKNOWN
if the information is not available.- See Also:
BIT_DEPTH_MULTI
,REFRESH_RATE_UNKNOWN
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Method Detail
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getHeight
public int getHeight()
Returns the height of the display, in pixels.- Returns:
- the height of the display, in pixels
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getWidth
public int getWidth()
Returns the width of the display, in pixels.- Returns:
- the width of the display, in pixels
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getBitDepth
public int getBitDepth()
Returns the bit depth of the display, in bits per pixel. This may beBIT_DEPTH_MULTI
if multiple bit depths are supported in this display mode.- Returns:
- the bit depth of the display, in bits per pixel.
- See Also:
BIT_DEPTH_MULTI
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getRefreshRate
public int getRefreshRate()
Returns the refresh rate of the display, in hertz. This may beREFRESH_RATE_UNKNOWN
if the information is not available.- Returns:
- the refresh rate of the display, in hertz.
- See Also:
REFRESH_RATE_UNKNOWN
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equals
public boolean equals(DisplayMode dm)
Returns whether the two display modes are equal.- Returns:
- whether the two display modes are equal
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equals
public boolean equals(Object dm)
Indicates whether some other object is "equal to" this one.The
equals
method implements an equivalence relation on non-null object references:- It is reflexive: for any non-null reference value
x
,x.equals(x)
should returntrue
. - It is symmetric: for any non-null reference values
x
andy
,x.equals(y)
should returntrue
if and only ify.equals(x)
returnstrue
. - It is transitive: for any non-null reference values
x
,y
, andz
, ifx.equals(y)
returnstrue
andy.equals(z)
returnstrue
, thenx.equals(z)
should returntrue
. - It is consistent: for any non-null reference values
x
andy
, multiple invocations ofx.equals(y)
consistently returntrue
or consistently returnfalse
, provided no information used inequals
comparisons on the objects is modified. - For any non-null reference value
x
,x.equals(null)
should returnfalse
.
The
equals
method for classObject
implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference valuesx
andy
, this method returnstrue
if and only ifx
andy
refer to the same object (x == y
has the valuetrue
).Note that it is generally necessary to override the
hashCode
method whenever this method is overridden, so as to maintain the general contract for thehashCode
method, which states that equal objects must have equal hash codes.- Overrides:
equals
in classObject
- Parameters:
dm
- the reference object with which to compare.- Returns:
true
if this object is the same as the obj argument;false
otherwise.- See Also:
Object.hashCode()
,HashMap
- It is reflexive: for any non-null reference value
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hashCode
public int hashCode()
Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided byHashMap
.The general contract of
hashCode
is:- Whenever it is invoked on the same object more than once during
an execution of a Java application, the
hashCode
method must consistently return the same integer, provided no information used inequals
comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. - If two objects are equal according to the
equals(Object)
method, then calling thehashCode
method on each of the two objects must produce the same integer result. - It is not required that if two objects are unequal
according to the
Object.equals(java.lang.Object)
method, then calling thehashCode
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 hash tables.
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.)- Overrides:
hashCode
in classObject
- Returns:
- a hash code value for this object.
- See Also:
Object.equals(java.lang.Object)
,System.identityHashCode(java.lang.Object)
- Whenever it is invoked on the same object more than once during
an execution of a Java application, the
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Document created the 11/06/2005, last modified the 04/03/2020
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