原型模式

Posted 2020-07-03 仙人掌的刺

大概是java版本升级了，clone方法不严格写好像也没什么问题。

/**
 * Created by hero on 16-4-2.
 */
public class Company implements Cloneable {
    private String name;

    public String getName() {
        return name;
    }

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

    public Company(String name) {
        this.name = name;
    }

    public Company clone() {
        Company company = null;
        try {
            company = (Company) super.clone();
        } catch (CloneNotSupportedException e) {
        }
        return company;
    }
}
/**
 * Created by hero on 16-4-2.
 */
public class BusinessCard implements Cloneable {
    private String name;
    private Company company;

    public String getName() {
        return name;
    }

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

    public Company getCompany() {
        return company;
    }

    public void setCompany(Company company) {
        this.company = company;
    }

    public BusinessCard clone() {
        BusinessCard card = null;
        try {
            card = (BusinessCard) super.clone();
            if(company!= null){
                card.company = company.clone();
            }
        } catch (CloneNotSupportedException e) {
        } //won‘t happen
        return card;
    }
}
public class Main {

    public static void main(String[] args) {
        BusinessCard card = new BusinessCard();
        card.setName("张无忌");
        card.setCompany(new Company("武当"));
        BusinessCard card1 = card.clone();
        card1.setCompany(new Company("少林"));
        System.out.println(card.getName() + ", " + card.getCompany().getName());
        System.out.println(card1.getName() + ", " + card1.getCompany().getName());
    }
}