代码：

public class Pair<T> {

    private T t1;
    private T t2;
    
    public T getT1() {
        return t1;
    }
    public void setT1(T t1) {
        this.t1 = t1;
    }
    public T getT2() {
        return t2;
    }
    public void setT2(T t2) {
        this.t2 = t2;
    }
}

public class User {

    private String name;
    private String sex;
    private Integer age;
    
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public Integer getAge() {
        return age;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
}

public class  Twins extends Pair<User> {

    @Override
    public void setT1(User t1) {
        if (t1 != null) {
            super.setT1(t1);
        }
    }

    @Override
    public void setT2(User t2) {
        if (t2 != null) {
            super.setT2(t2);
        }
    }
}

问题描述：虚拟机会将 Pair进行类型擦除，擦出后类型变量将替换为 Object，那么 Twins 类重写的方法 void setT1(User t1)及 void setT2(User t2)中参数会擦出为 Object吗？为什么？