a4j:commandButton rendering

[richfacesbie79]

I am a newbiw please bear with me for a dumb question and thanks for your time.

How to render a4j:commandButton conditionally?

For ex - I need to render the command button only if a member of the java object is not empty.

Something like: -

if(!obj.empty) {

//render button

}

else {

// 

}

[elf]

try to use "rendered" attribute

please see

http://livedemo.exadel.com/richfaces-demo/richfaces/commandButton.jsf?tab=info&cid=2613537