可不可以定义一个方法供不同的泛型使用？

public class Generic<T> {
    private T key;

    public Generic(T key) {
        this.key = key;
    }

    public T getKey() {
        return key;
    }
}

public class Hello {
    public static void main(String[] args) {
        Generic<Integer> genericInteger = new Generic<>(123456);
        Generic<String> genericString = new Generic<>("key_value");

        System.out.println("key is " + doWithGeneric(genericInteger));
        System.out.println("key is " + doWithGeneric(genericString));
    }

    public static String doWithGeneric(Generic<Object> generic) {
        return generic.getKey().toString();
    }
}