The lists of files or file names returned by the File listFiles() and list() methods include all files and directories.
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The lists of files or file names returned by the File listFiles() and list() methods include all files and directories. The files/directories that are included may be restricted by passing a java.io.FileFilter to these methods.
Creating a java.io.FileFilter
Create a class that implements the javax.io.FileFilter interface, which means that you must define the boolean accept() method. For example, to create a filter that accepts all directories and HTML files.
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Java Tip 83: Use
filters to access resources in Java archives - JavaWorld