Question

当程序启动时，在后台自动调用一个方法，而不使用线程。

class Abc
{
    main()
    {
        do something......
    }
}
class xyz
{
    public void show()
    {
         call every 1 minute in background
         do something.....
         with out affect main method
    }
}

Answer 1

只有1个帖子，你不能同时做两件事。你必须创建另一个线程。

Answer 2

假设您需要每隔1分钟从main调用show（）而不会干扰main（）代码

class Abc
{
    main()
    {
        Thread mythread = new Thread()
         {
            xyz myClass = new xyz();
            public void run()
            {
              while(true)
              {
                    myClass.show() // this will execute
                    thread.sleep(60000); // this will pause for a bit but wont affect your main code, add this in between try and catch to pause this thread alone withotu affecting main one for 1 min and it goes again and calls show()
               } 
            }
         }
        do something......            
    }
}
class xyz
{
    public void show()
    {
         // whatever you type here will now run every 1 min, without affecting your main code
    }
}

Answer 3

您可以使用ScheduledExecutorService来完成此任务。

public static class Scheduler {

        private Runnable task;
        private ScheduledExecutorService executorService;

        public Scheduler(Runnable task, ScheduledExecutorService executorService) {
          this.task = task;
          this.executorService = executorService;
        }

        public void start(long startDelay, long period ) {
          executorService.scheduleAtFixedRate(task, startDelay, period, TimeUnit.MINUTES);
        }
      }

如何在每分钟使用Java调用方法但在后台不影响当前进程？

3 个答案: