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| − | <span style="font-size:medium;"><span style="font-family: 'Helvetica Neue Light', HelveticaNeue-Light, 'Helvetica Neue', Helvetica, Arial, sans-serif; text-align: justify;">
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| − | Given:
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| − | </span></span>
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| − | <span style="font-size:medium;"><span style="font-family: 'Helvetica Neue Light', HelveticaNeue-Light, 'Helvetica Neue', Helvetica, Arial, sans-serif; line-height: 19px; text-align: justify;">
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| − | 1. public class Threads4{
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| − | 2. public static void main(String[] args){
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| − | 3. new Threads4.go();
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| − | 4. }
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| − | 5. public void go(){
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| − | 6. Runnable r = new Runnable(){
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| − | 7. public void run(){
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| − | 8. System.out.print("foo");
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| − | 9. }
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| − | 10. };
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| − | 11. Thread t = new Thread(r);
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| − | 12. t.start();
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| − | 13. t.start();
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| − | 14. }
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| − | 15.}
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| − | What is the result?
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| − | A. Compilation fails.
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| − | B. An exception is thrown at runtime.
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| − | C. The code executes normally and prints "foo";
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| − | D. The code executes normally, but nothing is printed.
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| − | </span></span>
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| − | <div class="toccolours mw-collapsible mw-collapsed">
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| − | <span style="font-size:medium;">解答</span>
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| − | ----
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| − | <div class="mw-collapsible-content">
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| − | <span style="font-size: medium;">Ans: E </span>
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| − | <span style="font-size:medium;"> 解說:
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| − | 一個執行緒只能啟動一次 (t.start()只能下一次)，執行緒是物件，物件相關的動作發生問題是在執行時期產生例外，而不是編譯的錯誤。
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| − | </span>
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| − | </div></div>
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| | {{SCJP 1.6版考題講解}} | | {{SCJP 1.6版考題講解}} |
