Future類原始碼解析翻譯
阿新 • • 發佈：2019-02-16
* <p>After this method returns, subsequent calls to {@link #isDone} will
* always return <tt>true</tt>. Subsequent calls to {@link #isCancelled}
* will always return <tt>true</tt> if this method returned <tt>true</tt>.
*翻譯：這個方法返回之後，如果這個方法返回true,則
* @param mayInterruptIfRunning <tt>true</tt> if the thread executing this
* task should be interrupted; otherwise, in-progress tasks are allowed
* to complete
* @return <tt>false</tt> if the task could not be cancelled,
* typically because it has already completed normally;
* <tt>true</tt> otherwise
*/翻譯：mayInterruptIfRunning，任務可以被取消時為true,任務如果不能被取消為false.
boolean cancel(boolean mayInterruptIfRunning);
/**
* Returns <tt>true</tt> if this task was cancelled before it completed
* normally.
*如果任務完成前取消，返回true
* @return <tt>true</tt> if this task was cancelled before it completed
*/
boolean isCancelled();
/**
* Returns <tt>true</tt> if this task completed.
*如果任務已經完成，返回true
* Completion may be due to normal termination, an exception, or
* cancellation -- in all of these cases, this method will return
* <tt>true</tt>.
*
* @return <tt>true</tt> if this task completed
*/
boolean isDone();
/**
* Waits if necessary for the computation to complete, and then
* retrieves its result.
*等待任務完成，返回結果
* @return the computed result
* @throws CancellationException if the computation was cancelled如果任務取消，丟擲CancellationException異常
* @throws ExecutionException if the computation threw an
* exception
* @throws InterruptedException if the current thread was interrupted
* while waiting如果當前執行緒被中斷在等待，丟擲InterruptedException
*/
V get() throws InterruptedException, ExecutionException;
/**
* Waits if necessary for at most the given time for the computation
* to complete, and then retrieves its result, if available.
*等待給定的等待最大時間，如果得到結果，返回結果
* @param timeout the maximum time to wait
* @param unit the time unit of the timeout argument
* @return the computed result
* @throws CancellationException if the computation was cancelled如果任務取消，丟擲CancellationException異常
* @throws ExecutionException if the computation threw an
* exception如果計算丟擲異常，則丟擲ExecutionException
* @throws InterruptedException if the current thread was interrupted
* while waiting
* @throws TimeoutException if the wait timed out丟擲TimeoutException異常，如果等待超時
*/
V get(long timeout, TimeUnit unit)
throws InterruptedException, ExecutionException, TimeoutException;
}
* always return <tt>true</tt>. Subsequent calls to {@link #isCancelled}
* will always return <tt>true</tt> if this method returned <tt>true</tt>.
*翻譯：這個方法返回之後，如果這個方法返回true,則
* @param mayInterruptIfRunning <tt>true</tt> if the thread executing this
* task should be interrupted; otherwise, in-progress tasks are allowed
* to complete
* @return <tt>false</tt> if the task could not be cancelled,
* typically because it has already completed normally;
* <tt>true</tt> otherwise
*/翻譯：mayInterruptIfRunning，任務可以被取消時為true,任務如果不能被取消為false.
boolean cancel(boolean mayInterruptIfRunning);
/**
* Returns <tt>true</tt> if this task was cancelled before it completed
* normally.
*如果任務完成前取消，返回true
* @return <tt>true</tt> if this task was cancelled before it completed
*/
boolean isCancelled();
/**
* Returns <tt>true</tt> if this task completed.
*如果任務已經完成，返回true
* Completion may be due to normal termination, an exception, or
* cancellation -- in all of these cases, this method will return
* <tt>true</tt>.
*
* @return <tt>true</tt> if this task completed
*/
boolean isDone();
/**
* Waits if necessary for the computation to complete, and then
* retrieves its result.
*等待任務完成，返回結果
* @return the computed result
* @throws CancellationException if the computation was cancelled如果任務取消，丟擲CancellationException異常
* @throws ExecutionException if the computation threw an
* exception
* @throws InterruptedException if the current thread was interrupted
* while waiting如果當前執行緒被中斷在等待，丟擲InterruptedException
*/
V get() throws InterruptedException, ExecutionException;
/**
* Waits if necessary for at most the given time for the computation
* to complete, and then retrieves its result, if available.
*等待給定的等待最大時間，如果得到結果，返回結果
* @param timeout the maximum time to wait
* @param unit the time unit of the timeout argument
* @return the computed result
* @throws CancellationException if the computation was cancelled如果任務取消，丟擲CancellationException異常
* @throws ExecutionException if the computation threw an
* exception如果計算丟擲異常，則丟擲ExecutionException
* @throws InterruptedException if the current thread was interrupted
* while waiting
* @throws TimeoutException if the wait timed out丟擲TimeoutException異常，如果等待超時
*/
V get(long timeout, TimeUnit unit)
throws InterruptedException, ExecutionException, TimeoutException;
}