关于Swing组件扩展的经验法则是什么? [英] What's the rule of thumb regarding Swing component extension?

问题描述

将类专用于特定的Swing组件时，最好是extend该特定组件，或者在内部构造它并提供引用?

When dedicating a class to a particular Swing component, is it better to extend that particular component, or construct it internally and provide a reference?

public class Foo extends JComponent{

}

OR

public class Foo{
    public JComponent getComponent(){
    }
}

编辑

这就是我所说的专用

public class Foo{
    private static Foo INSTANCE;

    public static Foo getInstance(){
        if(INSTANCE == null){
            INSTANCE = new Foo();
        }
    }

    public void createAndShowComponent(){
        //do stuff
    }
}

在createAndShowComponent()内，我创建一个JComponent，其中包含所有组件以及它们各自的侦听器，而没有公开我刚刚创建的组件的内部.

Inside createAndShowComponent(), I create a JComponent with all its components and their respective listeners without exposing the internals of the component I just created.

推荐答案

+1表示合成扩展.因为您只公开了对新组件重要的方法，所以它使API更加整洁

+1 for Composition over extension. It makes the API much cleaner since you only expose what methods are important for your new component

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