javax.sound.sampled
Class LineEvent.Type
- LineEvent
This class represents the kinds of state changes that can occur
to a Line. The standard states are availabe as static instances.
Type(String name)- Create a new type with the indicated name.
|
boolean | equals(Object o)- Determine whether this Object is semantically equal
to another Object.
|
int | hashCode()- Get a value that represents this Object, as uniquely as
possible within the confines of an int.
|
String | toString()- Return the name of this Type.
|
clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
CLOSE
public static final LineEvent.Type CLOSE
An event of this type is posted when a Line closes.
OPEN
public static final LineEvent.Type OPEN
An event of this type is posted when a Line opens.
START
public static final LineEvent.Type START
An event of this type is posted when a Line starts.
STOP
public static final LineEvent.Type STOP
An event of this type is posted when a Line stops.
Type
protected Type(String name)
Create a new type with the indicated name.
equals
public final boolean equals(Object o)
Determine whether this Object is semantically equal
to another Object.
There are some fairly strict requirements on this
method which subclasses must follow:
- It must be transitive. If
a.equals(b) and
b.equals(c), then a.equals(c)
must be true as well. - It must be symmetric.
a.equals(b) and
b.equals(a) must have the same value. - It must be reflexive.
a.equals(a) must
always be true. - It must be consistent. Whichever value a.equals(b)
returns on the first invocation must be the value
returned on all later invocations.
a.equals(null) must be false.- It must be consistent with hashCode(). That is,
a.equals(b) must imply
a.hashCode() == b.hashCode().
The reverse is not true; two objects that are not
equal may have the same hashcode, but that has
the potential to harm hashing performance.
This is typically overridden to throw a
ClassCastException
if the argument is not comparable to the class performing
the comparison, but that is not a requirement. It is legal
for
a.equals(b) to be true even though
a.getClass() != b.getClass(). Also, it
is typical to never cause a
NullPointerException.
In general, the Collections API (
java.util) use the
equals method rather than the
==
operator to compare objects. However,
IdentityHashMap
is an exception to this rule, for its own good reasons.
The default implementation returns
this == o.
- equals in interface Object
- whether this Object is semantically equal to another
hashCode
public final int hashCode()
Get a value that represents this Object, as uniquely as
possible within the confines of an int.
There are some requirements on this method which
subclasses must follow:
- Semantic equality implies identical hashcodes. In other
words, if
a.equals(b) is true, then
a.hashCode() == b.hashCode() must be as well.
However, the reverse is not necessarily true, and two
objects may have the same hashcode without being equal. - It must be consistent. Whichever value o.hashCode()
returns on the first invocation must be the value
returned on all later invocations as long as the object
exists. Notice, however, that the result of hashCode may
change between separate executions of a Virtual Machine,
because it is not invoked on the same object.
Notice that since
hashCode is used in
Hashtable and other hashing classes,
a poor implementation will degrade the performance of hashing
(so don't blindly implement it as returning a constant!). Also,
if calculating the hash is time-consuming, a class may consider
caching the results.
The default implementation returns
System.identityHashCode(this)
- hashCode in interface Object
- the hash code for this Object
Copyright (C) 2005 Free Software Foundation, Inc.
This file is part of GNU Classpath.
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it under the terms of the GNU General Public License as published by
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02110-1301 USA.
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