public final class PrintJob extends Object
PrintJobInfo
class.
The state of a print job may change over time. An application receives
instances of this class when creating a print job or querying for
its print jobs.Modifier and Type | Method and Description |
---|---|
void |
cancel()
Cancels this print job.
|
boolean |
equals(Object obj)
Indicates whether some other object is "equal to" this one.
|
PrintJobId |
getId()
Gets the unique print job id.
|
PrintJobInfo |
getInfo()
Gets the
PrintJobInfo that describes this job. |
int |
hashCode()
Returns a hash code value for the object.
|
boolean |
isBlocked()
Gets whether this print job is blocked.
|
boolean |
isCancelled()
Gets whether this print job is cancelled.
|
boolean |
isCompleted()
Gets whether this print job is completed.
|
boolean |
isFailed()
Gets whether this print job is failed.
|
boolean |
isQueued()
Gets whether this print job is queued.
|
boolean |
isStarted()
Gets whether this print job is started.
|
void |
restart()
Restarts this print job.
|
public PrintJobId getId()
public PrintJobInfo getInfo()
PrintJobInfo
that describes this job.
Node:The returned info object is a snapshot of the current print job state. Every call to this method returns a fresh info object that reflects the current print job state.
public void cancel()
isQueued()
,
isStarted()
,
isBlocked()
,
isFailed()
public void restart()
isFailed()
public boolean isQueued()
cancel()
.cancel()
public boolean isStarted()
cancel()
.cancel()
public boolean isBlocked()
cancel()
.cancel()
public boolean isCompleted()
public boolean isFailed()
public boolean isCancelled()
public boolean equals(Object obj)
Object
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
obj
- the reference object with which to compare.true
if this object is the same as the obj
argument; false
otherwise.Object.hashCode()
,
HashMap
public int hashCode()
Object
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.
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 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.)
hashCode
in class Object
Object.equals(java.lang.Object)
,
System.identityHashCode(java.lang.Object)