開始/暫停/恢復的方法在Java中

Question

可能重複：
Start/Suspend/Resume/Suspend … a method invoked by other class

我想實現的任何時候K-NN分類，但我無法找到一個方法來調用「將方法分類（...）「一段特定時間，暫停它，在方法被暫停之前獲得可用結果，恢復方法一段特定時間，暫停它，在方法被暫停之前獲得可用結果，等等......

提前致謝！

Answer 1

我最近在這裏發佈了一個PauseableThread。

您可以使用ReadWriteLock實現暫停。如果您每次遇到暫停機會時立即抓住寫鎖，那麼您只需要暫停就可以抓取一個讀鎖來暫停您。

// The lock. 
    private final ReadWriteLock pause = new ReentrantReadWriteLock(); 

    // Block if pause has been called without a matching resume. 
    private void blockIfPaused() throws InterruptedException { 
    try { 
     // Grab a write lock. Will block if a read lock has been taken. 
     pause.writeLock().lockInterruptibly(); 
    } finally { 
     // Release the lock immediately to avoid blocking when pause is called. 
     pause.writeLock().unlock(); 
    } 
    } 

    // Pause the work. NB: MUST be balanced by a resume. 
    public void pause() { 
    // We can wait for a lock here. 
    pause.readLock().lock(); 
    } 

    // Resume the work. NB: MUST be balanced by a pause. 
    public void resume() { 
    // Release the lock. 
    pause.readLock().unlock(); 
    }