Swing table

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import javax.swing.*;
import javax.swing.table.*;
import java.io.File;
import java.util.Date;

public class FileTableDemo {
  public static void main(String[] args) {
    // Figure out what directory to display
    File dir;
    if (args.length > 0) dir = new File(args[0]);
    else dir = new File(System.getProperty("user.home"));

    // Create a TableModel object to represent the contents of the directory
    FileTableModel model = new FileTableModel(dir);

    // Create a JTable and tell it to display our model
    JTable table = new JTable(model);

    // Display it all in a scrolling window and make the window appear
    JFrame frame = new JFrame("FileTableDemo");
    frame.getContentPane().add(new JScrollPane(table), "Center");
    frame.setSize(600, 400);
    frame.setVisible(true);
  }
}
class FileTableModel extends AbstractTableModel {
      protected File dir;
      protected String[] filenames;

      protected String[] columnNames = new String[] {
        "name", "size", "last modified", "directory?", "readable?", "writable?"
      };

      protected Class[] columnClasses = new Class[] {
        String.class, Long.class, Date.class,
          Boolean.class, Boolean.class, Boolean.class
      };

      // This table model works for any one given directory
      public FileTableModel(File dir) {
        this.dir = dir;
        this.filenames = dir.list();  // Store a list of files in the directory
      }

      // These are easy methods
      public int getColumnCount() { return 6; }  // A constant for this model
      public int getRowCount() { return filenames.length; }  // # of files in dir

      // Information about each column
      public String getColumnName(int col) { return columnNames[col]; }
      public Class getColumnClass(int col) { return columnClasses[col]; }

      // The method that must actually return the value of each cell
      public Object getValueAt(int row, int col) {
        File f = new File(dir, filenames[row]);
        switch(col) {
        case 0: return filenames[row];
        case 1: return new Long(f.length());
        case 2: return new Date(f.lastModified());
        case 3: return f.isDirectory() ? Boolean.TRUE : Boolean.FALSE;
        case 4: return f.canRead() ? Boolean.TRUE : Boolean.FALSE;
        case 5: return f.canWrite() ? Boolean.TRUE : Boolean.FALSE;
        default: return null;
        }
      }
    }