New to Java

I am trying to override toString function as follows:

public void toString()
{
(isMale() ? "male " : "female ") + "elephant"
}

I want it to display the output of:

"male elephant" or "female elephant" based on the whether the boolean isMale is true or false. If it is true it would be the first option.

I keep getting the error:

Error: <identifier> expected

Thanks for any help I can get.