Java implements a simple timer code analysis

We see a lot of timing functions on mobile phones, such as regular garbage cleaning, alarm clock, etc Timer object is mainly used in Java, and multithreading technology is used internally

Time class is mainly responsible for completing scheduled tasks, that is, executing a task at the beginning of the specified time

Timer class is used to set scheduled tasks, and the class encapsulating task content is TimerTask class This class is an abstract class. Inheritance needs to implement a run method

Using java to make timer is relatively simple, and there are ready-made interfaces to help realize it. Timer and TimerTask are used to make timers in Java, which is the of util package. java. util. Timer timer is actually a thread that regularly schedules timertasks owned by it. A TimerTask is actually a class with a run method. The code that needs to be executed regularly is placed in the run method body. TimerTask is generally created as an anonymous class.

In our practical application, we often separate TimerTask from a single class to form a custom task

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