Java Runtime 的 addShutdownHook 方法示例，,addShutdownH

Java Runtime 的 addShutdownHook 方法示例，,addShutdownH

addShutdownHook 方法可用来捕获进程终止时的事件，例如按了 Ctrl+C 终止应用的时候

/**  * Demonstrate adding a Shutdown Hook to the Runtime. */public class ShutDownHook {  public static void main(String[] args) {    System.err.println("Starting main program");    Runtime rt = Runtime.getRuntime();    System.err.println("Main: adding shutdown hook");    rt.addShutdownHook(new Thread() {      public void run() {        // In real life this might close a Connection or something.        System.err.println("Running my shutdown hook");      }    });    System.err.println("Main: calling Runtime.exit()");    rt.exit(0);  }}//该片段来自于http://byrx.net