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java.lang.Objectjavax.swing.text.StyleContext.SmallAttributeSet
public class StyleContext.SmallAttributeSet
Nested Class Summary |
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Nested classes/interfaces inherited from interface javax.swing.text.AttributeSet |
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AttributeSet.CharacterAttribute, AttributeSet.ColorAttribute, AttributeSet.FontAttribute, AttributeSet.ParagraphAttribute |
Field Summary |
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Fields inherited from interface javax.swing.text.AttributeSet |
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NameAttribute, ResolveAttribute |
Constructor Summary | |
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StyleContext.SmallAttributeSet(AttributeSet a)
|
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StyleContext.SmallAttributeSet(Object[] a)
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Method Summary | |
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Object |
clone()
This method may be called to create a new copy of the Object. |
boolean |
containsAttribute(Object name,
Object value)
Returns true if this AttributeSet contains
an attribute with the specified name and value ,
false otherwise. |
boolean |
containsAttributes(AttributeSet a)
Returns true of this AttributeSet contains all
of the specified attributes . |
AttributeSet |
copyAttributes()
Creates and returns a copy of this AttributeSet . |
boolean |
equals(Object obj)
Determine whether this Object is semantically equal to another Object. |
Object |
getAttribute(Object key)
Returns the attribute with the specified key or
null if no such attribute is defined in this
AttributeSet and its resolving parents. |
int |
getAttributeCount()
Returns the number of attributes that are stored locally in this AttributeSet . |
Enumeration<?> |
getAttributeNames()
Returns the names of the attributes that are stored in this AttributeSet . |
AttributeSet |
getResolveParent()
Returns the resolving parent of this AttributeSet . |
int |
hashCode()
Get a value that represents this Object, as uniquely as possible within the confines of an int. |
boolean |
isDefined(Object key)
Returns true if an attribute with the specified name is
defined locally in this AttributeSet , without resolving
through the resolving parents. |
boolean |
isEqual(AttributeSet attr)
Returns true if all of the attributes in attr
are equal to the attributes in this AttributeSet ,
false otherwise. |
String |
toString()
Convert this Object to a human-readable String. |
Methods inherited from class java.lang.Object |
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finalize, getClass, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public StyleContext.SmallAttributeSet(AttributeSet a)
public StyleContext.SmallAttributeSet(Object[] a)
Method Detail |
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public Object clone()
Object
o == o.clone()
is falseo.getClass() == o.clone().getClass()
is trueo.equals(o)
is trueHowever, these are not strict requirements, and may
be violated if necessary. Of the three requirements, the
last is the most commonly violated, particularly if the
subclass does not override Object.equals(Object)
.
If the Object you call clone() on does not implement
Cloneable
(which is a placeholder interface), then
a CloneNotSupportedException is thrown. Notice that
Object does not implement Cloneable; this method exists
as a convenience for subclasses that do.
Object's implementation of clone allocates space for the new Object using the correct class, without calling any constructors, and then fills in all of the new field values with the old field values. Thus, it is a shallow copy. However, subclasses are permitted to make a deep copy.
All array types implement Cloneable, and override
this method as follows (it should never fail):
public Object clone() { try { super.clone(); } catch (CloneNotSupportedException e) { throw new InternalError(e.getMessage()); } }
clone
in class Object
Cloneable
public boolean containsAttribute(Object name, Object value)
AttributeSet
true
if this AttributeSet
contains
an attribute with the specified name
and value
,
false
otherwise.
containsAttribute
in interface AttributeSet
name
- the name of the requested attributevalue
- the value of the requested attribute
true
if this AttributeSet
contains
an attribute with the specified name
and
value
, false
otherwisepublic boolean containsAttributes(AttributeSet a)
AttributeSet
true
of this AttributeSet
contains all
of the specified attributes
.
containsAttributes
in interface AttributeSet
a
- the requested attributes
true
of this AttributeSet
contains all
of the specified attributes
public AttributeSet copyAttributes()
AttributeSet
AttributeSet
.
copyAttributes
in interface AttributeSet
AttributeSet
public boolean equals(Object obj)
Object
There are some fairly strict requirements on this
method which subclasses must follow:
a.equals(b)
and
b.equals(c)
, then a.equals(c)
must be true as well.a.equals(b)
and
b.equals(a)
must have the same value.a.equals(a)
must
always be true.a.equals(null)
must be false.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 class Object
obj
- the Object to compare to
Object.hashCode()
public Object getAttribute(Object key)
AttributeSet
key
or
null
if no such attribute is defined in this
AttributeSet
and its resolving parents.
getAttribute
in interface AttributeSet
key
- the key of the attribute that is looked up
key
or
null
if no such attribute is defined in this
AttributeSet
and its resolving parentspublic int getAttributeCount()
AttributeSet
AttributeSet
.
getAttributeCount
in interface AttributeSet
AttributeSet
public Enumeration<?> getAttributeNames()
AttributeSet
AttributeSet
.
getAttributeNames
in interface AttributeSet
AttributeSet
public AttributeSet getResolveParent()
AttributeSet
AttributeSet
.
If a key is not stored locally, then a AttributeSet.getAttribute(Object)
request is resolved up in the resolving parent of this
AttributeSet
.
getResolveParent
in interface AttributeSet
AttributeSet
public int hashCode()
Object
There are some requirements on this method which
subclasses must follow:
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.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 class Object
Object.equals(Object)
,
System.identityHashCode(Object)
public boolean isDefined(Object key)
AttributeSet
true
if an attribute with the specified name is
defined locally in this AttributeSet
, without resolving
through the resolving parents.
isDefined
in interface AttributeSet
true
if an attribute with the specified name is
defined locally in this AttributeSet
public boolean isEqual(AttributeSet attr)
AttributeSet
true
if all of the attributes in attr
are equal to the attributes in this AttributeSet
,
false
otherwise.
isEqual
in interface AttributeSet
attr
- the attributes to be compared to this
true
if all of the attributes in attr
are equal to the attributes in this AttributeSet
,
false
otherwisepublic String toString()
Object
System.out.println()
and such.
It is typical, but not required, to ensure that this method
never completes abruptly with a RuntimeException
.
This method will be called when performing string
concatenation with this object. If the result is
null
, string concatenation will instead
use "null"
.
The default implementation returns
getClass().getName() + "@" +
Integer.toHexString(hashCode())
.
toString
in class Object
Object.getClass()
,
Object.hashCode()
,
Class.getName()
,
Integer.toHexString(int)
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