public
static
final
class
PrintAttributes.Resolution
extends Object
java.lang.Object | |
↳ | android.print.PrintAttributes.Resolution |
This class specifies a supported resolution in DPI (dots per inch). Resolution defines how many points with different color can be placed on one inch in horizontal or vertical direction of the target media. For example, a printer with 600 DPI can produce higher quality images the one with 300 DPI resolution.
Public constructors | |
---|---|
PrintAttributes.Resolution(String id, String label, int horizontalDpi, int verticalDpi)
Creates a new instance. |
Public methods | |
---|---|
boolean
|
equals(Object obj)
Indicates whether some other object is "equal to" this one. |
int
|
getHorizontalDpi()
Gets the horizontal resolution in DPI (dots per inch). |
String
|
getId()
Gets the unique resolution id. |
String
|
getLabel()
Gets the resolution human readable label. |
int
|
getVerticalDpi()
Gets the vertical resolution in DPI (dots per inch). |
int
|
hashCode()
Returns a hash code value for the object. |
String
|
toString()
Returns a string representation of the object. |
Inherited methods | |
---|---|
From
class
java.lang.Object
|
PrintAttributes.Resolution (String id, String label, int horizontalDpi, int verticalDpi)
Creates a new instance.
Parameters | |
---|---|
id |
String :
The unique resolution id. It is unique amongst other resolutions
supported by the printer. |
label |
String :
The localized human readable label. |
horizontalDpi |
int :
The horizontal resolution in DPI (dots per inch). |
verticalDpi |
int :
The vertical resolution in DPI (dots per inch). |
Throws | |
---|---|
IllegalArgumentException |
If the id is empty or the label is empty or the horizontalDpi is less than or equal to zero or the verticalDpi is less than or equal to zero. |
boolean equals (Object obj)
Indicates whether some other object is "equal to" this one.
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.
Parameters | |
---|---|
obj |
Object :
the reference object with which to compare. |
Returns | |
---|---|
boolean |
true if this object is the same as the obj
argument; false otherwise. |
int getHorizontalDpi ()
Gets the horizontal resolution in DPI (dots per inch).
Returns | |
---|---|
int |
The horizontal resolution. |
String getId ()
Gets the unique resolution id. It is unique amongst other resolutions supported by the printer.
This id is defined by the client that generated the resolution instance and should not be interpreted by other parties.
Returns | |
---|---|
String |
The unique resolution id. |
String getLabel ()
Gets the resolution human readable label.
Returns | |
---|---|
String |
The human readable label. |
int getVerticalDpi ()
Gets the vertical resolution in DPI (dots per inch).
Returns | |
---|---|
int |
The vertical resolution. |
int hashCode ()
Returns a hash code value for the object. This method is
supported for the benefit of hash tables such as those provided by
HashMap
.
The general contract of hashCode
is:
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.
equals(Object)
method, then calling the hashCode
method on each of
the two objects must produce the same integer result.
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 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.)
Returns | |
---|---|
int |
a hash code value for this object. |
String toString ()
Returns a string representation of the object. In general, the
toString
method returns a string that
"textually represents" this object. The result should
be a concise but informative representation that is easy for a
person to read.
It is recommended that all subclasses override this method.
The toString
method for class Object
returns a string consisting of the name of the class of which the
object is an instance, the at-sign character `@
', and
the unsigned hexadecimal representation of the hash code of the
object. In other words, this method returns a string equal to the
value of:
getClass().getName() + '@' + Integer.toHexString(hashCode())
Returns | |
---|---|
String |
a string representation of the object. |