import java.io.*;

/**
 * Aplicación de ejemplo para ver un archivo de texto.
 * <P>
 * Uso: <code> <i>fileName</i> FileViewer de Java</code>
 */
public class JFileViewer
{
    private static JTextViewer view;
    
    public static void main( String[] args )
    {
        if ( args.length != 1 )
        {
            System.err.println( "uso: <filename> de FileViewer de Java" );
            System.exit( 1 );
        }
        
        view = new JTextViewer( args[ 0 ] );
        
        try
        {
            FileReader in = new FileReader( args[ 0 ] );
            char [] buf = new char[ 512 ];
            int nread;
            while( ( nread = in.read( buf ) ) >= 0 )
            {
                view.append( new String( buf, 0, nread ) );
            }
            
            in.close();
        }
        catch ( IOException e )
        {
            handleErr( e );
        }
        
        view.pack();
        view.setVisible( true );
    }
    
    private static void handleErr( Exception e )
    {
        System.err.println( e );
        
        view.setVisible( false );
        view.dispose();
        System.exit( 1 );
    }
}