else if ( !new File( previewImageText.getText( ) ).exists( ) ) { setErrorMessage( Messages.getFormattedString( IMAGE_ERROR, new String[]{ previewImageText.getText( ) } ) ); setPageComplete( false ); return; }
	private void validate( )	{		if ( previewImageText.getText( ).trim( ).length( ) == 0 )		{			setErrorMessage( null );			setPageComplete( true );		}		else if ( !new File( previewImageText.getText( ) ).exists( ) )		{			setErrorMessage( Messages.getFormattedString( IMAGE_ERROR,					new String[]{						previewImageText.getText( )					} ) );			setPageComplete( false );			return;		}		else		{			setErrorMessage( null );			setPageComplete( true );		}	}