如何在java中为动作实现简单的撤消/重做？ [英] How do I implement a simple undo/redo for actions in java?

问题描述

我已经创建了一个XML编辑器，我在最后阶段陷入困境：添加撤消/重做功能。

I've created an XML editor and I'm stuck at the last phase: adding undo/redo functionality.

我只需添加撤消/当用户向JTree添加元素，属性或文本时重做。

I've only got to add undo/redo for when users add elements, attributes, or text to the JTree.

我仍然很新，但今天在学校我试图（不成功）创建两个stack object []调用undo和redo并添加执行的操作。

I'm still quite new at this but in school today I attempted (unsuccessfully) to create two stack object []'s called undo and redo and to add the actions performed into them.

对于实例，我有：

Action AddElement() {

// some code
public void actionPerformed(ActionEvent e) {

                    performElementAction();
                }
}

performElementAction实际上只是向JTree添加了一个元素。

the performElementAction just actually adds an Element to the JTree.

我想添加一种方法来将这个动作添加到我的撤销堆栈中。是否有一种简单的方法来实现undo.push（执行整个动作）或什么？

I want to add a way to add this action performed to my undo stack. is there a simple way to just undo.push( the entire action performed) or something?

抱歉听起来像个坏人，但这就是我:(

Sorry for sounding like a baddie, but that is what I am :(

推荐答案

查看命令模式，其用途包括实现撤消/重做功能。

Take a look at the Command Pattern, its uses include implementing undo/redo functionality.

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