e050. determining when the application is about to exit.txt

来自「这里面包含了一百多个JAVA源文件」· 文本 代码 · 共 10 行

When an application is terminated normally, the application first starts any registered shutdown threads, waits for them to complete and then finally exits. Normal termination can be caused by a call to System.exit(), the completion of the last non-daemon thread, or the interruption of the application (control-C) by the user. Abnormal termination (which does not cause the shutdown threads to be started) is caused some major fault in the Java virtual machine or native library. 
    // Register a shutdown thread
    Runtime.getRuntime().addShutdownHook(new Thread() {
        // This method is called during shutdown
        public void run() {
            // Do shutdown work ...
        }
    });