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java.awt
Class DisplayMode
java.lang.Object
java.awt.DisplayMode
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public final class
DisplayMode
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extends
Object
The DisplayMode class encapsulates the bit depth, height, width, and refresh rate of a GraphicsDevice. Display modes are hardware-dependent and may not always be available.
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Since:
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1.4
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See Also:
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GraphicsDevice
Field Summary
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static int |
BIT_DEPTH_MULTI
Value of the bit depth if multiple bit depths are supported in this dislay mode. |
static int |
REFRESH_RATE_UNKNOWN
Value of the refresh rate if not known |
Constructor Summary
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DisplayMode
(int width, int height, int bitDepth, int refreshRate)
Create a new display mode object with the supplied parameters. |
BIT_DEPTH_MULTI
public static final int BIT_DEPTH_MULTI
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Value of the bit depth if multiple bit depths are supported in this dislay mode.
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See Also:
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getBitDepth()
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Constant Field Values
REFRESH_RATE_UNKNOWN
public static final int REFRESH_RATE_UNKNOWN
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Value of the refresh rate if not known
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See Also:
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getRefreshRate()
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Constant Field Values
DisplayMode
public DisplayMode(int width,
int height,
int bitDepth,
int refreshRate)
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Create a new display mode object with the supplied parameters.
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Parameters:
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width - the width of the display, in pixels
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height - the height of the display, in pixels
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bitDepth - the bit depth of the display, in bits per pixel. This can be BIT_DEPTH_MULTI if multiple bit depths are available.
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refreshRate - the refresh rate of the display, in hertz. This can be REFRESH_RATE_UNKNOWN if the information is not available.
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See Also:
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BIT_DEPTH_MULTI
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REFRESH_RATE_UNKNOWN
getHeight
public int getHeight()
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Returns:
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the height of the display, in pixels
getWidth
public int getWidth()
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Returns:
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the width of the display, in pixels
getBitDepth
public int getBitDepth()
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Returns:
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the bit depth of the display, in bits per pixel. This may be BIT_DEPTH_MULTI if multiple bit depths are supported in this display mode.
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See Also:
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BIT_DEPTH_MULTI
getRefreshRate
public int getRefreshRate()
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Returns:
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the refresh rate of the display, in hertz. This may be REFRESH_RATE_UNKNOWN if the information is not available.
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See Also:
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REFRESH_RATE_UNKNOWN
equals
public boolean equals(DisplayMode dm)
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Returns:
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whether the two display modes are equal
equals
public boolean equals ( Object dm)
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Description copied from class:
Object
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Indicates whether some other object is "equal to" this one.
The equals method implements an equivalence relation on non-null object references:
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It is
reflexive
: for any non-null reference value x, x.equals(x) should return true.
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It is
symmetric
: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
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It is
transitive
: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
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It is
consistent
: for any non-null reference values 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.
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For any non-null reference value 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.
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Overrides:
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equals
in class
Object
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Parameters:
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dm - the reference object with which to compare.
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Returns:
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whether the two display modes are equal
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See Also:
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Object.hashCode()
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Hashtable
hashCode
public int hashCode()
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Description copied from class:
Object
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Returns a hash code value for the object. This method is supported for the benefit of hashtables such as those provided by java.util.Hashtable.
The general contract of hashCode is:
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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 in
equals
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.
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If two objects are equal according to the
equals(Object)
method, then calling the hashCode method on each of the two objects must produce the same integer result.
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It is not required that if two objects are unequal according to the
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 Java
TM
programming language.)
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Overrides:
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hashCode
in class
Object
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Returns:
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a hash code value for this object
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See Also:
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Object.equals(java.lang.Object)
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Hashtable