Can somebody give me an example of using jsf converters?

I want to convert the text entered by someone into a textbox into a double(for example), and automatically set up the value of an bean field with that doubl开发者_开发知识库e.

• implement javax.faces.convert.Converter
• in the getAsString(..) method use object.toString()
• in the getAsObject(..) method use new BigDecimal(str) / Double.parseDouble(str) / Integer.parseInt(str). Use instanceof to differentiate between the types.
• register the converter in faces-config.xml.