Исходный текст программы FileInfo.java

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// ==========================================
// FileInfo.java
// (C) Alexandr Frolov, 1998
// E-mail: frolov@glasnet.ru
// Web:    http://www.glasnet.ru/~frolov 
// ==========================================

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

public class FileInfo
{
  public static void main(String args[])
  {
    FrameWindow frame;
    frame =  new FrameWindow(
      "Show File Information");
    frame.setVisible(true);
  }
}

// =======================================
// Class FrameWindow
// =======================================
class FrameWindow extends Frame
  implements ActionListener, WindowListener
{
  TextArea ta;
  
  MenuBar mb;
  
  Menu mFile;
  MenuItem miOpen;
  MenuItem miExit;
  
  FileDialog fdlg;
  
  // ============================================
  // FrameWindow
  // ============================================
  public FrameWindow(String szTitle)
  {
    super(szTitle);
    setSize(400, 300);
    
    mb = new MenuBar();
    mFile = new Menu("File");
    
    miOpen = new MenuItem("Open...");
    mFile.add(miOpen);
    
    mFile.add("-");
    
    miExit = new MenuItem("Exit");
    mFile.add(miExit);
    
    mb.add(mFile);
    
    miOpen.addActionListener(this);
    miExit.addActionListener(this);
    
    setMenuBar(mb);
    
    this.addWindowListener(this);
    
    ta = new TextArea(10, 30);

    setLayout(new BorderLayout());
    add("Center", ta);
  }

  // ============================================
  // actionPerformed
  // ============================================
  public void actionPerformed(ActionEvent e)
  {
    if(e.getSource().equals(miOpen))
    {
      fdlg = new FileDialog(this, "Select file", 
	FileDialog.LOAD);
      fdlg.show();
      
      if(fdlg.getFile() == null)
	return;
	
      File f = new File(fdlg.getDirectory(),
	fdlg.getFile());

      if(f.exists())
      {
	ta.append(
          "---------------------------\n");
	ta.append("Absolute path: " + 
	  f.getAbsolutePath() + "\n");
	  
	try
	{
	  ta.append("Canonical path: " + 
	    f.getCanonicalPath() + "\n");
	}
	catch(IOException ex) {}
	  
	ta.append("Path: " + 
	  f.getPath() + "\n");
	  
	ta.append("Name: " + 
	  f.getName() + "\n");
	  
	ta.append("Parent: " + 
	  f.getParent() + "\n");
	  
	ta.append("Lenth: " + 
	  f.length() + " bytes\n");
	  
	if(f.canRead())
	{
	  ta.append("Can read from file\n"); 
	}  
	
	if(f.canWrite())
	{
	  ta.append("Can write to file\n"); 
	}  
      }	
    }
    
    else if(e.getSource().equals(miExit))
    {
      setVisible(false);
      System.exit(0);
    }
  }
  
  // ============================================
  // windowClosing
  // ============================================
  public void windowClosing(WindowEvent e)
  {
    setVisible(false);
    System.exit(0);
  }
  
  public void windowOpened(WindowEvent e) {}
  public void windowClosed(WindowEvent e) {}
  public void windowIconified(WindowEvent e) {}
  public void windowDeiconified(WindowEvent e) {}
  public void windowActivated(WindowEvent e) {}
  public void windowDeactivated(WindowEvent e) {}
}

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