20145109 《Java程序设计》第六周学习总结

Chapter 10 I/O

10.1 InputStream & OutputStream

a new 'try' edition:

try (InputStream input = src; OutputStream output = dest) {
     byte[] data = new byte[1024];
     int length;
     while ((length = input.read(data)) != -1) {
         output.write(data, 0, length);
     }
}

try ( ... ) :

http://www.oschina.net/question/12_10706

how to set program arguments in IDEA:

Run --> Edit Condigurations --> (Application) Configuration --> Program arguments

Chapter 11 Tread & Parallel API

11.1 Tread

The way to add 'CPU' is to create Thread instance, then start() it.

1 . Runnable

Every time running it, the result is different.

2 . Thread

For tortoise & hare, change 'implements Runnable' into 'extends Thread'. The main class are as follows:

Thread life cycle

1 . Daemon Thread

None output

We can see the result. Magical.

2 . Runnable, Blocked, Running

We can set priority using 'setPriority()', in which the value ranges from 1 (Thread.MIN_PRIORITY) to 10 (Thread.MAX_PRIORITY). The default is 5 (Thread.NORM_PRIORITY). If not, IllegalArgumentException will be thrown.

To enter Blocked state:

Thread.sleep(),

wait(),

I/O,

...

When a thread is in 'Blocked', another thread call its interrupt() can wake it up, leaving the blocked state.

3 . join()

Current thread will stop until the joined thread ends.

4 . stop

thread.stop() is not recommended. Stop, suspend, resume should operated according to the requires, but not to call these method directly.