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## com.google.common.io
Class PatternFilenameFilter

    java.lang.Object
      com.google.common.io.PatternFilenameFilter

All Implemented Interfaces:
  FilenameFilter

    @Beta
    public final class PatternFilenameFilter

extends Object
implements FilenameFilter

File name filter that only accepts files matching a regular expression. This class is thread-safe and immutable.

Since:
  1.0
Author:
  Apple Chow

Constructor Summary
`PatternFilenameFilter(Pattern pattern)` Constructs a pattern file name filter object.
`PatternFilenameFilter(String patternStr)` Constructs a pattern file name filter object.

Method Summary
`boolean` | `accept(File dir, String fileName)`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### PatternFilenameFilter

    public PatternFilenameFilter(String patternStr)

  Constructs a pattern file name filter object.

  Parameters:
    `patternStr` - the pattern string on which to filter file names
  Throws:
    `PatternSyntaxException` - if pattern compilation fails (runtime)

### PatternFilenameFilter

    public PatternFilenameFilter(Pattern pattern)

  Constructs a pattern file name filter object.

  Parameters:
    `pattern` - the pattern on which to filter file names

Method Detail

### accept

    public boolean accept(@Nullable
                          File dir,
                          String fileName)

  Specified by:
    `accept` in interface `FilenameFilter`

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