Java - 强制实现已实现的方法

问题描述

我有三个课程有问题.它们被命名为:GameScene、StageScene、StageOne.我的问题是我想在 StageScene 中实现 initialize，但仍然强制 StageOne 实现它，这样每当有人使用 StageOne 对象 (stageOne.initialize()) 时，都会为 StageScene 和 StageOne 运行 initialize.有谁知道如何做到这一点?

I have three classes which I have a problem with. They are named: GameScene, StageScene, StageOne. My problem is that I want to implement initialize in StageScene, but still force StageOne to implement it, so that whenever someone uses a StageOne object (stageOne.initialize()), initialize would be run for both StageScene and StageOne. Anyone know how this could be done?

public abstract class GameScene
{
    public abstract void initialize();
}

public abstract class StageScene extends GameScene
{
    public abstract void initialize()
    {
        //Some code
    }
}
public class StageOne extends StageScene
{
    public void initialize()
    {
        //Some code
    }
}

推荐答案

您可以使用包装器来实现:

you can do it with a wrapper:

public abstract class StageScene extends GameScene
{
    final public void initialize()
    {
        //your initialization
        subInitialize();
    }

    protected abstract void subInitialize();
}

在子类中:

public class StageOne extends StageScene
{
    public void subInitialize()
    {
        //Some code
    }
}

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