Package org.apache.commons.io.filefilter
Class RegexFileFilter
- java.lang.Object
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- org.apache.commons.io.filefilter.AbstractFileFilter
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- org.apache.commons.io.filefilter.RegexFileFilter
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- All Implemented Interfaces:
java.io.FileFilter
,java.io.FilenameFilter
,java.io.Serializable
,IOFileFilter
public class RegexFileFilter extends AbstractFileFilter implements java.io.Serializable
Filters files using supplied regular expression(s).See java.util.regex.Pattern for regex matching rules
e.g.
File dir = new File("."); FileFilter fileFilter = new RegexFileFilter("^.*[tT]est(-\\d+)?\\.java$"); File[] files = dir.listFiles(fileFilter); for (int i = 0; i < files.length; i++) { System.out.println(files[i]); }
- Since:
- 1.4
- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description RegexFileFilter(java.lang.String pattern)
Construct a new regular expression filter.RegexFileFilter(java.lang.String pattern, int flags)
Construct a new regular expression filter with the specified flags.RegexFileFilter(java.lang.String pattern, IOCase caseSensitivity)
Construct a new regular expression filter with the specified flags case sensitivity.RegexFileFilter(java.util.regex.Pattern pattern)
Construct a new regular expression filter for a compiled regular expression
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
accept(java.io.File dir, java.lang.String name)
Checks to see if the filename matches one of the regular expressions.-
Methods inherited from class org.apache.commons.io.filefilter.AbstractFileFilter
accept, toString
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Constructor Detail
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RegexFileFilter
public RegexFileFilter(java.lang.String pattern)
Construct a new regular expression filter.- Parameters:
pattern
- regular string expression to match- Throws:
java.lang.IllegalArgumentException
- if the pattern is null
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RegexFileFilter
public RegexFileFilter(java.lang.String pattern, IOCase caseSensitivity)
Construct a new regular expression filter with the specified flags case sensitivity.- Parameters:
pattern
- regular string expression to matchcaseSensitivity
- how to handle case sensitivity, null means case-sensitive- Throws:
java.lang.IllegalArgumentException
- if the pattern is null
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RegexFileFilter
public RegexFileFilter(java.lang.String pattern, int flags)
Construct a new regular expression filter with the specified flags.- Parameters:
pattern
- regular string expression to matchflags
- pattern flags - e.g.Pattern.CASE_INSENSITIVE
- Throws:
java.lang.IllegalArgumentException
- if the pattern is null
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RegexFileFilter
public RegexFileFilter(java.util.regex.Pattern pattern)
Construct a new regular expression filter for a compiled regular expression- Parameters:
pattern
- regular expression to match- Throws:
java.lang.IllegalArgumentException
- if the pattern is null
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Method Detail
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accept
public boolean accept(java.io.File dir, java.lang.String name)
Checks to see if the filename matches one of the regular expressions.- Specified by:
accept
in interfacejava.io.FilenameFilter
- Specified by:
accept
in interfaceIOFileFilter
- Overrides:
accept
in classAbstractFileFilter
- Parameters:
dir
- the file directory (ignored)name
- the filename- Returns:
- true if the filename matches one of the regular expressions
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