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<td width="90%"><font size="4" face="Verdana, Arial, Helvetica"><b>重要的線程方法 </b></font></td><td width="200" align="right"><font size="1" face="Verdana, Arial, Helvetica"><nobr>   第 4 頁（共7 頁）</nobr></font></td>
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<p>
						
<code>sleep()</code> 方法使當前線程睡眠一段以毫秒計的給定時間： </p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
  public static void sleep(long millis) throws InterruptedException
</code>
</pre>
<p>
						
<code>yield()</code> 方法使當前線程從 running 狀態進入 runnable 狀態，以使其他線程有機會運行。不過，下一個被選擇運行的線程也可能還是這個線程： </p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
  public static void yield()
</code>
</pre>
<p>如果對其調用 <code>isAlive()</code> 方法的線程已經開始，但是還沒有進入 dead 狀態，那么這個方法就返回 <code>true</code> 。</p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
  public final boolean isAlive()
</code>
</pre>
<p>當線程對其他線程調用 <code>join()</code> 方法時，當前運行的線程就會等待直到連接的線程完成： </p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
  void join()        
  void join(long millis) 
  void join(long millis, int nanos) 
</code>
</pre>
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