EventHandler is a delegate for a function that takes an Object (the sender) and eventargs.

这里EventHandler是某个函数的委托，该函数带有参数：Object(也就是sender)和eventargs。

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This latter feature of using EventHandler is less of an issue with the other versions of create .

使用EventHandler的另一个特点是对于其他版本的create来说，很少出现问题。

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Listing 3 duplicates the earlier button selection example shown in Figure 1, using an EventHandler.

清单3重复了前面图1中的按钮选择例子，使用了一个EventHandler。

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It would be even more object oriented if you replaced the last bits of the if statement with a Map connecting EventTypes to EventHandler factory objects.

要想进一步增强面向对象特性，可以将if语句的最后一小部分替换为Map，后者将EventType连接到EventHandler工厂对象。

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Instead of creating a class that implements an interface and registering that implementation with the component whose event you are interested in, you create an EventHandler instance and register it.

它不是创建一个实现了接口的类、并将这个实现注册到需要监听的事件所在的组件上，而是创建一个EventHandler实例并注册它。

youdao

Instead of creating a class that implements an interface and registering that implementation with the component whose event you are interested in, you create an EventHandler instance and register it.

它不是创建一个实现了接口的类、并将这个实现注册到需要监听的事件所在的组件上，而是创建一个EventHandler实例并注册它。

youdao