檢視 SCJP 1.6版考題 238 的原始碼

Which two code fragments will execute the method doStuff() in a separate thread? (Choose two.) 

A. new Thread(){ 

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;public void run(){doStuff();} 

&nbsp; &nbsp; &nbsp; }; 

B. new Thread(){ 

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; public void start(){doStuff(); 

&nbsp; &nbsp; &nbsp; &nbsp;}; 

;

C new Thread(){ 

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;public void start(){doStuff();} 

&nbsp; &nbsp; &nbsp;}.run(); 

D. new Thread(){ 

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; public void run(){doStuff();} 

&nbsp; &nbsp; &nbsp;}.start(); 

E. new Thread(new Runnable(){ 

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; public void run(){doStuff();} 

&nbsp; &nbsp; &nbsp;}).run(); 

F. new Thread(new Runnable(){ 

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; public void run(){doStuff();} 

&nbsp; &nbsp; &nbsp;}).start();


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<span style="font-size:medium;">解答</span>

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<span style="font-size: medium;">Ans: D F   </span>

<span style="font-size:medium;"> 解說:
題目要求那二個程式片段可以在一個分開的執行緒上執行doStuff方法。
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&nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp;執行緒的啟動是要呼叫start方法，若是以呼叫run來看，run方法是執行在main執行緒之上，不是分開的執行緒。
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{{SCJP 1.6版考題講解}}