从类型对象克隆的方法不可见

Question

嗨我在java中尝试深度克隆我想深度克隆这个类Deepcloning，它有两个原始字段和一个引用

public class Deepcloning implements Cloneable {

    private String name;
    private int age;
    private Adress adress;

    public Deepcloning() {

    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public Adress getAdress() {
        return adress;
    }

    public void setAdress(Adress adress) {
        this.adress = adress;
    }

    @Override
    public Object clone() throws CloneNotSupportedException {
        Deepcloning shls = (Deepcloning) super.clone();
        shls.setAdress((Adress) adress.clone());
        return shls;
    }

}

我想克隆这个类但仍然得到错误，类型对象的方法克隆不可见错误。任何帮助将不胜感激