ADF:- MethodExpression

FacesContext context = FacesContext.getCurrentInstance();MethodExpression methodEx = context.getApplication().getExpressionFactory().createMethodExpression(context.getELContext(), "#{myHandler.action}", String.class, new Class[] {});
myComponent.setActionExpression(methodEx );

ADF:- MethodBinding

MethodBinding methodBinding = FacesContext.getCurrentInstance().getApplication().createMethodBinding( "#{myHandler.action}",null);
myComponent.setAction( methodBinding );