SwingUtilities.invokeLater：我应该何时使用它以及如何使用它？

SwingUtilities.invokeLater: When and How to Use

When working with Swing GUI components, it's essential to understand the purpose and usage of SwingUtilities.invokeLater. This method plays a crucial role in managing GUI updates on the Event Dispatch Thread (EDT).

When to Use SwingUtilities.invokeLater

invokeLater is necessary when you need to update GUI components from threads other than the EDT. The EDT is负责处理用户界面事件，如鼠标点击和按键操作。因此，如果从其他线程对 GUI 进行修改，则需要安排这些更新在 EDT 上执行。

如何使用 SwingUtilities.invokeLater

为了在 EDT 上计划 GUI 更新，可以使用以下语法：

SwingUtilities.invokeLater(new Runnable() {
  @Override
  public void run() {
    // GUI update code
  }
});

替代方案

SwingUtilities.invokeLater is not the only method for scheduling GUI updates on the EDT. Other alternatives include:

• SwingUtilities.invokeAndWait - Similar to invokeLater, but blocks the calling thread until the GUI update is complete.
• Callable.invokeLater and Runnable.invokeLater - Added in Java 9 and 10, respectively, these methods simplifyinvokeLaterby providing more concise lambda syntax.

It's important to note that while these methods can eliminate some "seemingly unnecessary code," they still serve the fundamental purpose of ensuring that GUI updates are performed safely on the EDT.

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