使计时器在代码中的特定点启动

// 一次性计时器
setTimeout(() => {
    console.log('This runs after 3 seconds');
}, 3000);

// 重复计时器
setInterval(() => {
    console.log('This runs every 2 seconds');
}, 2000);

import time

# 一次性计时器
def delayed_task():
    print("This runs after 3 seconds")
time.sleep(3)
delayed_task()

# 重复计时器
while True:
    print("This runs every 2 seconds")
    time.sleep(2)

import java.util.Timer;
import java.util.TimerTask;

public class TimerExample {
    public static void main(String[] args) {
        // 一次性计时器
        Timer timer = new Timer();
        timer.schedule(new TimerTask() {
            @Override
            public void run() {
                System.out.println("This runs after 3 seconds");
            }
        }, 3000);

        // 重复计时器
        timer.scheduleAtFixedRate(new TimerTask() {
            @Override
            public void run() {
                System.out.println("This runs every 2 seconds");
            }
        }, 0, 2000);
    }
}