How to get the 'text' property value of a button in coding?

Hi Experts,
I'm using 10 buttons all are having common action('click'). when i click a button the 'text' value of the button should pass to a function.So the action is same but the passed value will be the 'text' value of the corresponding button. I don't know how to get the 'text' property of a button in coding. Kindly help me to solve this problem.
Thanks and Regards
Basheer

Hi,
My event is like this.
public void onActionclick(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )
     String s = ? ; // should get the 'text' property of clicked button
     fillInput(s);     // function to be called
The called function is,
public void fillInput( java.lang.String id )
    String str=wdContext.currentContextElement().getNum();
    str = str + id;
    wdContext.currentContextElement().setNum(str);
How can i get the 'text' property value of the corresponding button. Click action should be common to all buttons.
Thanks and Regards,
Basheer

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