Package com.jidesoft.comparator
Class ComparableComparator
- java.lang.Object
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- com.jidesoft.comparator.ComparableComparator
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- All Implemented Interfaces:
java.io.Serializable
,java.util.Comparator<java.lang.Object>
public class ComparableComparator extends java.lang.Object implements java.util.Comparator<java.lang.Object>, java.io.Serializable
A Comparator that compares Comparable objects. Throws ClassCastExceptions if the objects are not Comparable, or if they are null. Throws ClassCastException if the compareTo of both objects do not provide an inverse result of each other as per the Comparable javadoc. This Comparator is useful, for example, for enforcing the natural order in custom implementations of SortedSet and SortedMap.
If both objects are null, they will be treated as equal. If one is null and the other is not, the null value will be treated as smaller then non-null value.- Author:
- bayard@generationjava.com, JIDE Software
- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description ComparableComparator()
Constructs a ComparableComparator.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description int
compare(java.lang.Object o1, java.lang.Object o2)
static ComparableComparator
getInstance()
Return a shared instance of a ComparableComparator.
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Method Detail
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getInstance
public static ComparableComparator getInstance()
Return a shared instance of a ComparableComparator. Developers are encouraged to use the comparator returned from this method instead of constructing a new instance to reduce allocation and GC overhead when multiple comparable comparators may be used in the same VM.- Returns:
- an instance of ComparableComparator.
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compare
public int compare(java.lang.Object o1, java.lang.Object o2)
- Specified by:
compare
in interfacejava.util.Comparator<java.lang.Object>
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