1.背景                      

追MM的例子,Boy追MM,需要送礼物Gift,有Flower,Ring继承自Gift;

还有WarmGift温暖的礼物,WildGift狂野的礼物;

Boy:

public class Boy {
    private String name;
    
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
    
    public void pursue(MM mm){
        Gift g = new Ring();
        give(g, mm);
    }
    
    public void give(Gift g, MM mm){
        
    }
}
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