java - Tomcat servlet 和 JFrame

Question

我在我的树莓派上运行一个 Tomcat 服务器。当有人浏览我的服务器时，servlet 会启动一个 JFrame，在我的电视(连接到 Pi)上显示一些信息。

这是在 servlet 中的制作方式:

public static JFrame gui;

@Override
public void init() throws ServletException { // super.init() not needed
    if (gui==null) gui = launchUi();
    else if(!gui.isVisible()) gui.setVisible(true);
}

问题是，当我停止服务器时，JFrame 没有关闭。这是我在 Tomcat 日志中找到的内容。

janv. 20, 2014 9:53:18 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [/myapp] appears to have started a thread named [AWT-Shutdown] but has failed to stop it. This is very likely to create a memory leak.
janv. 20, 2014 9:53:18 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [/myapp] appears to have started a thread named [AWT-EventQueue-0] but has failed to stop it. This is very likely to create a memory leak.

如何强制关闭 JFrame？还是我做错了？ (那么正确的方法是什么？) 谢谢

Answer 1

将逻辑实现到 destroy() 方法中:

public void destroy() {
    gui.setVisible(false);
}