主页 / 问题 / 1061863
Accepted
Александр
Asked:2020-12-22 22:23:40 +0000 UTC2020-12-22 22:23:40 +0000 UTC

制作自定义类的副本

  • 772

有一个自定义类

public class Man implements Serializable{
    private HashMap<Object,Object> manMap;

    public HashMap<Object, Object> getManMap() {
        return manMap;
    }

    public void setManMap(HashMap<Object, Object> manMap) {
        this.manMap = manMap;
    }
}

有一些代码

Man man11=new Man();
        HashMap<Object,Object> dannie=new HashMap<>();
        dannie.put("Фамилия","Иванов");
        dannie.put("Имя","Иван");
        dannie.put("Отчество","Иванович");
        man11.setManMap(dannie);
        Man msn22=man11;

        dannie.put("Фамилия","Сидоров");
        dannie.put("Имя","Сидор");
        dannie.put("Отчество","Сидорович");
        man11.setManMap(dannie);

        System.out.println(msn22.getManMap().get("Фамилия").toString()+
                msn22.getManMap().get("Имя").toString()+
                msn22.getManMap().get("Отчество").toString());

请告诉我如何创建不随对象更改的对象的副本。需要使副本保持与更改前对象相同的状态吗？

java

1 个回答

  1. Best Answer
    public void setManMap(HashMap<Object, Object> manMap) {
    this.manMap = new HashMap<Object, Object>(manMap);
}

Man msn22 = new Man();
    • 0

相关问题