Package org.apache.commons.io.comparator
Class LastModifiedFileComparator
- java.lang.Object
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- org.apache.commons.io.comparator.AbstractFileComparator
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- org.apache.commons.io.comparator.LastModifiedFileComparator
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- All Implemented Interfaces:
java.io.Serializable
,java.util.Comparator<java.io.File>
public class LastModifiedFileComparator extends AbstractFileComparator implements java.io.Serializable
Compare the last modified date/time of two files for order (seeFile.lastModified()
).This comparator can be used to sort lists or arrays of files by their last modified date/time.
Example of sorting a list of files using the
LASTMODIFIED_COMPARATOR
singleton instance:List<File> list = ... ((AbstractFileComparator) LastModifiedFileComparator.LASTMODIFIED_COMPARATOR).sort(list);
Example of doing a reverse sort of an array of files using the
LASTMODIFIED_REVERSE
singleton instance:File[] array = ... ((AbstractFileComparator) LastModifiedFileComparator.LASTMODIFIED_REVERSE).sort(array);
- Since:
- 1.4
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description static java.util.Comparator<java.io.File>
LASTMODIFIED_COMPARATOR
Last modified comparator instancestatic java.util.Comparator<java.io.File>
LASTMODIFIED_REVERSE
Reverse last modified comparator instanceprivate static long
serialVersionUID
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Constructor Summary
Constructors Constructor Description LastModifiedFileComparator()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description int
compare(java.io.File file1, java.io.File file2)
Compare the last the last modified date/time of two files.-
Methods inherited from class org.apache.commons.io.comparator.AbstractFileComparator
sort, sort, toString
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Field Detail
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serialVersionUID
private static final long serialVersionUID
- See Also:
- Constant Field Values
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LASTMODIFIED_COMPARATOR
public static final java.util.Comparator<java.io.File> LASTMODIFIED_COMPARATOR
Last modified comparator instance
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LASTMODIFIED_REVERSE
public static final java.util.Comparator<java.io.File> LASTMODIFIED_REVERSE
Reverse last modified comparator instance
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Method Detail
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compare
public int compare(java.io.File file1, java.io.File file2)
Compare the last the last modified date/time of two files.- Specified by:
compare
in interfacejava.util.Comparator<java.io.File>
- Parameters:
file1
- The first file to comparefile2
- The second file to compare- Returns:
- a negative value if the first file's lastmodified date/time is less than the second, zero if the lastmodified date/time are the same and a positive value if the first files lastmodified date/time is greater than the second file.
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