Prototype&&Deep Copy

原创已于 2022-08-19 08:12:46 修改 · 148 阅读

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#原型模式 #java #开发语言

于 2022-08-19 08:11:49 首次发布

该博客介绍了原型设计模式在Java中的应用，通过重写clone()方法实现对象的快速复制。展示了如何创建一个Beast类及其工厂类，用于创建Beast对象的副本，从而提高代码效率。

Prototype Design Pattern

基于重写clone()的相关优化

Prototype Design Pattern

public class Beast {

    private final String name;
    private final int id;

    private Beast(Beast beast) {
        this.name = beast.name;
        this.id= beast.id;
    }

    public Beast copy() {
        return new Beast(this);
    }
}

public class BeastFactory {
    private final Beast beastPrototype;

    public BeastFactory(Beast beastPrototype) {
        this.beastPrototype = beastPrototype;
    }

    public Beast createBeast() {
        return beastPrototype.copy();
    }
}

基于重写clone()的相关优化

public class Beast {

    private final String name;
    private final int id;

    private Beast(Beast beast) {
        this.name = beast.name;
        this.id= beast.id;
    }

    @Override
    protected Object clone() throws CloneNotSupportedException {
        return new Beast(this);

    }
}

public class BeastFactory {
    private final Beast beastPrototype;

    public BeastFactory(Beast beastPrototype) {
        this.beastPrototype = beastPrototype;
    }

    public Beast createBeast() throws CloneNotSupportedException {
        return (Beast) beastPrototype.clone();
    }
}