Java Swing - 如何讀取SwingWorker中的文件內(nèi)容

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import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JProgressBar;
import javax.swing.SwingWorker;
public class Main {
  public static void main(String[] args) {
    JProgressBar pb = new JProgressBar(0, 100);
    ReadFileWorker worker = new ReadFileWorker();
    worker.addPropertyChangeListener(new PropertyChangeListener() {
      @Override
      public void propertyChange(PropertyChangeEvent evt) {
        if ("progress".equalsIgnoreCase(evt.getPropertyName())) {
          pb.setValue(worker.getProgress());
        }
      }
    });
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.add(pb);
    f.pack();
    f.setVisible(true);
    worker.execute();
  }
}
class ReadFileWorker extends SwingWorker<List<String>, String> {
 
 
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