SwingUtilities.invokeLater（）为什么需要它？ [英] SwingUtilities.invokeLater() why is it needed?

问题描述

为什么有必要将GUI更新代码放在 SwingUtilities.invokeLater（）？

Why is it necessary to put GUI update code in SwingUtilities.invokeLater()?

为什么不能由Swing自己内部照顾？为什么调用者必须关心swing如何处理UI更新？

Why cant it be internally taken care of by Swing itself? Why does the caller have to care about how swing handles UI updates?

推荐答案

Swing对象不是线程安全的。 SwingUtilities.invokeLater（）允许在稍后的某个时间点执行任务，顾名思义;但更重要的是，该任务将在AWT事件派发线程上执行。使用 invokeLater 时，任务以异步方式执行;还有 invokeAndWait ，在任务完成执行之前不会返回。

Swing objects are not thread safe. SwingUtilities.invokeLater() allows a task to be executed at some later point in time, as the name suggests; but more importantly, the task will be executed on the AWT event dispatch thread. When using invokeLater, the task is executed asynchronously; there's also invokeAndWait, which won't return until the task has finished executing.

有关决定的一些信息没有可以在这里找到使Swing线程安全的方法：多线程工具包：A失败的梦想？

Some information about the decision not to make Swing thread-safe can be found here: Multithreaded toolkits: A failed dream?

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