泛型

public class TTest <T>{
    private T c;

    public TTest(T c) {
        this.c = c;
    }

    public T getC() {
        return c;
    }

    public void setC(T c) {
        this.c = c;
    }

    public static void main(String[] args) {
        TTest<Dog> dog = new TTest<>(new Dog());
        dog.setC(new Dog("dog","black"));
        Dog c = dog.getC();
        System.out.println(c.getColor());
        System.out.println(c.getKind());

    }
}