測試代碼的時間間隔

Question

嗨我想在一段時間內運行代碼。例如，我想我的代碼做這樣的事情。

for(every 5 minutes until i say to stop) 
automatically read in new value for x 
automatically read in new value for y 

if (x==y) 
    //do something 

if (x!=y) 
    //do something else 

Answer 1

Timer是你所需要的。

Answer 2

天真的版本。您可以考慮使用Timer或quartz scheduler。

while (!done) { 
    try { 
    Thread.sleep(5 * 60 * 1000); 
    x = readX(); 
    y = readY(); 
    if (x == y) { 

    } else { 

    } 
    } catch(InterruptedException ie) { 
    } 
} 

Answer 3

System.currentTimeMillis（）;以毫秒爲單位返回系統時間，您可以使用它。但是首先，你需要某種循環。 這是Timer的替代

public static final int SECONDS = 1000; 
public static final int MINUTES = 60 * SECONDS; 

boolean quit = false; //Used to quit when you want to.. 
long startTime = System.currentTimeMillis(); 

while (!quit) { 
    if (System.currentTimeMillis() >= (startTime + (long)5*MINUTES)) { 
     //automatically read in new value for x 
     //automatically read in new value for y 

     if (x==y) { 
      //do something 
     } else { 
     //do something else 
     } 
     startTime = System.currentTimeMillis(); //reset the timer for the next 5 minutes 
    } 
} 

Answer 4

如何：

Runnable runnable = new Runnable() { 
    public void run() { 
     // do your processing here 
    } 
}; 

ScheduledExecutorService service = Executors.newSingleThreadScheduledExecutor(); 
service.scheduleAtFixedRate(runnable, 0, 5, TimeUnit.MINUTES); 

通話時要停止service.shutdown()。