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java.lang.Object | +--org.apache.commons.collections.comparators.ComparableComparator
A Comparator
that compares
Comparable
objects.
ClassCastException
if
either of the arguments to compare
were null
, not Comparable
,
or for which compareTo
gave
inconsistent results. This is no longer the case. See
compare(java.lang.Object, java.lang.Object)
for details.
Collections.reverseOrder()
,
Serialized FormConstructor Summary | |
ComparableComparator()
|
Method Summary | |
int |
compare(Object o1,
Object o2)
Compare the two Comparable arguments. |
boolean |
equals(Object that)
Returns true iff that Object is
is a Comparator whose ordering is
known to be equivalent to mine. |
static ComparableComparator |
getInstance()
Return a shared instance of a ComparableComparator. |
int |
hashCode()
Implement a hash code for this comparator that is consistent with equals(java.lang.Object) . |
Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public ComparableComparator()
Method Detail |
public static ComparableComparator getInstance()
public int compare(Object o1, Object o2)
Comparable
arguments.
This method is equivalent to:
((Comparable
)o1).compareTo
(o2)
compare
in interface Comparator
NullPointerException
- when o1 is null
,
or when ((Comparable)o1).compareTo(o2)
does
ClassCastException
- when o1 is not a Comparable
,
or when ((Comparable)o1).compareTo(o2)
doespublic int hashCode()
equals(java.lang.Object)
.
hashCode
in class Object
public boolean equals(Object that)
true
iff that Object is
is a Comparator
whose ordering is
known to be equivalent to mine.
This implementation returns true
iff that.
equals getClass()
this.getClass()
. Subclasses may want to override
this behavior to remain consistent with the Comparator.equals(java.lang.Object)
contract.
equals
in interface Comparator
equals
in class Object
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