Swing components that are the targets of user interaction fire events when the user interacts with them; data model classes fire events when the data has changed.

Swing组件作为用户交互的目标，在用户与它们交互的时候触发事件；数据模型类在数据发生变化时触发事件。

youdao

First of all, I think school should open some classes for escaping from fire, teaching students some main principles in that situation.

首先，我认为学校应该开设火灾逃亡的课程，教学生一些遇到火灾时的重要注意事项。

youdao

First of all, I think school should open some classes for escaping from fire, teaching students some main principles in that situation.

首先，我认为学校应该开设火灾逃亡的课程，教学生一些遇到火灾时的重要注意事项。

youdao