Runtime.getRuntime().addShutdownHook(
时间: 2024-02-10 10:51:17 浏览: 25
new Thread() {
public void run() {
// code to be executed before program terminates
}
});
This code adds a shutdown hook to the Java runtime. A shutdown hook is a thread that is executed when the program is about to terminate, either because the user has terminated it or because it has encountered an error.
The code inside the run() method of the thread will be executed before the program terminates. This can be used to perform cleanup operations or to save data before the program exits.
Note that the code in the shutdown hook should be designed to execute quickly, as the program may terminate abruptly if it takes too long to complete.
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Runtime.getRuntime().addShutdownHook
引用和介绍了使用Java中的Runtime.getRuntime().addShutdownHook()方法来添加关闭钩子。关闭钩子是一个已经初始化但尚未启动的线程,当JVM关闭时会执行这些钩子。关闭钩子可以在JVM关闭时执行一些内存清理和资源回收等工作。引用中也提到了这个方法,并指出当程序正常退出、系统调用System.exit方法或虚拟机被关闭时,才会执行添加的shutdownHook线程。
因此,使用Runtime.getRuntime().addShutdownHook()方法可以在Java程序关闭时执行一些必要的清理工作,以确保程序的正常退出和资源的释放。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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runtime.getruntime().addshutdownhook
runtime.getruntime().addshutdownhook是Java中的一个方法,用于向虚拟机注册一个钩子程序,在虚拟机关闭之前执行。这个方法可以用来在程序结束前执行一些清理工作,比如关闭文件、释放资源等。
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