import java.io.*;
import java.awt.*;
import java.awt.event.*;

class FileDemo2 extends Frame implements ActionListener,WindowListener
{
   private TextArea inputTextArea;
   private Button loadButton;
   private BufferedReader inFile;
   private TextField nameField;

   public static void main (String [] args)
   {
     FileDemo2 demo = new FileDemo2();
     demo.setSize(300,400);
     demo.makeGui();
     demo.setVisible(true);
   }

   public void makeGui()
   {
      Panel top = new Panel();
      loadButton = new Button("load");
      top.add(loadButton);
      loadButton.addActionListener(this);
      add("North",top);
      inputTextArea = new TextArea("",10,50);
      add("Center", inputTextArea);
      addWindowListener(this);
   }

   public void actionPerformed(ActionEvent evt)
   {
      if (evt.getSource() ==loadButton)
      {
        String fileName;
        fileName = nameField.getText();
        try
        {
          inFile = new BufferedReader(new FileReader(fileName));
          inputTextArea.setText("");
          String line;

          while ((line = inFile.readLine() ) !=null)
          {
            inputTextArea.append(line+"\n");
          }

          inFile.close();
        }

        catch(IOException e)
        {
            System.err.println("Error in file"+fileName+":" +e.toString() );
            System.exit(1);
        }

      }
  }

  public void windowClosing(WindowEvent e)
  {
    System.exit(0);
  }

  public void windowIconified(WindowEvent e)
  {
  }

  public void windowOpened(WindowEvent e)
  {
  }

  public void windowClosed(WindowEvent e)
  {
  }

  public void windowDeiconified(WindowEvent e)
  {
  }

  public void windowActivated(WindowEvent e)
  {
  }

  public void windowDeactivated(WindowEvent e)
  {
  }
}