三元运营商不能拥有不返回值的语句， void 方法。您需要具有返回值的语句。

Ternary operators can't have statements that don't return values, void methods. You need statements that have return values.

您需要重写它。

void bark(boolean hamlet) {
     System.out.println( hamlet ? "To Bark." : "Not to Bark" );
}