import java.awt.*;
import java.io.*;
import java.net.URL;
import javax.swing.*;

public class TestEditorPane {

  public static void main(String[] args) {
      try {
          String filename = "C:\\Temp\\temp.txt";
          URL url = (new File(filename)).toURL();
          JEditorPane editorPane = new JEditorPane(url);
          editorPane.setEditable(false);
      
          int width = 200;
          int height= 300;
          
          JFrame frame = new JFrame();
          frame.getContentPane().add(editorPane, BorderLayout.CENTER);
          frame.setSize(width, height);
          frame.setVisible(true);
      } catch (IOException e) {
        e.printStackTrace();
      }
  }
  
}