JAVA判断某个类是指定类的实例

Question

现在有个Fruit父类，下面有各种水果apple,orange继承Fruit,给出一个具体水果的List,如何判读是否有某一个子类的实例

//判断fruiltList是否有？中给出的类，如果有返回该类(?是不知道形参该如何表示)，
//比如？入参是Orange，要判断fruitList是否有Orange的实例，如果有则返回list中的Orange对象
public static <T extends Fruit> T getInstant(List<Fruit> fruitList,?){
      
}

public static void main(String[] args) {
        List<Fruit> fruitList = new ArrayList<>();
        Oranger orange = new Oranger("orange");
        Apple apple= new Apple("apple");
        fruitList.add(orange);
        fruitList.add(apple);
        //这边的入参怎么弄
        Apple apple= getInstant(fruitList, Apple.class);
        
}

Answer 1

instanceOf

Answer 2

Traversal, instanceof operator

Maybe so. . I haven’t learned java in depth

public static <T extends Fruit> T getInstant(List<Fruit> fruitList, Class c){
      
}

Reference: https://docs.oracle.com/javas...