import edu.stanford.nlp.io.ExtensionFileFilter; //导入依赖的package包/类
private void f_miOpenActionPerformed(@SuppressWarnings("unused") java.awt.event.ActionEvent evt) {//GEN-FIRST:event_f_miOpenActionPerformed
      JFileChooser _chooseFile = new JFileChooser(f_lastDirectoryText);
      _chooseFile.setFileFilter(new ExtensionFileFilter("txt",true));
if(!(_chooseFile.showOpenDialog(null) == JFileChooser.APPROVE_OPTION)){
	return;
}
File _f = _chooseFile.getSelectedFile();
System.out.println(_f.getAbsolutePath());
f_lastDirectoryText = _f.getParentFile();
loadText(_f);
      
  }
 

import edu.stanford.nlp.io.ExtensionFileFilter; //导入依赖的package包/类
/**
 * Load trees from given directory.
 *
 * @param pathName    File or directory name
 * @param suffix      Extension of files to load: If <code>pathName</code>
 *                    is a directory, then, if this is
 *                    non-<code>null</code>, all and only files ending in "." followed
 *                    by this extension will be loaded; if it is <code>null</code>,
 *                    all files in directories will be loaded.  If <code>pathName</code>
 *                    is not a directory, this parameter is ignored.
 * @param recursively descend into subdirectories as well
 */
public void loadPath(String pathName, String suffix, boolean recursively) {
  loadPath(new File(pathName), new ExtensionFileFilter(suffix, recursively));
}
 

import edu.stanford.nlp.io.ExtensionFileFilter; //导入依赖的package包/类
/**
 * Apply a method to the files under a given directory and
 * perhaps its subdirectories.
 *
 * @param pathStr     file or directory to load from as a String
 * @param suffix      suffix (normally "File extension") of files to load
 * @param recursively true means descend into subdirectories as well
 * @param processor   The <code>FileProcessor</code> to apply to each
 *                    <code>File</code>
 */
public static void processPath(String pathStr, String suffix, boolean recursively, FileProcessor processor) {
  processPath(new File(pathStr), new ExtensionFileFilter(suffix, recursively), processor);
}