Java资源回收

资源回收的时机

• 程序kill -9与kill -15的区别，以及回调函数的作用 - ungoneless的博客 - CSDN博客

  public class ShutdownHookTest {
  
      private static final void shutdownCallback() {
          System.out.println("Shutdown callback is invoked.");
          // 在这回收资源
      }
  
      public static void main(String[] args) throws InterruptedException {
          Runtime.getRuntime().addShutdownHook(new Thread(ShutdownHookTest::shutdownCallback));
          Thread.sleep(20000);
      }
  }

java ShutdownHookTest

ps -aux | grep ShutdownHookTest

kill -15 6483