[How to set image in jasper title programmatically]

I am creating jasper report without using jrxml template. I need to know how can we set how image in jasper title programmatically?

  

   ...

  //Title

    band = new JRDesignBand();

    band.setHeight(50);

    textField = new JRDesignTextField();

    textField.setBlankWhenNull(true);

    textField.setX(0);

    textField.setY(10);

    textField.setWidth(515);

    textField.setHeight(30);

    textField.setHorizontalAlignment(HorizontalAlignEnum.CENTER);

    textField.setStyle(normalStyle);

    textField.setFontSize(22);

    expression = new JRDesignExpression();

    expression.setValueClass(java.lang.String.class);

    expression.setText("$P{ReportTitle}");

    textField.setExpression(expression);

    band.addElement(textField);

    jasperDesign.setTitle(band);



[/code]

 

here instead of text field I need to add an image. What should I do?