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单项选择题 1. class A implements Runnable (  2. int i;  3. public void run ( ) (  4. try (  5. thread.sleep(5000);  6. i= 10;  7. ) catch(InterruptedException e) {}  8. )  9. )  10.    11. public class Test {  12. public static void  main (string args[]) ( 13. try (  14. A a = new A ( );  15. Thread t = new Thread (a);  16. t.start( );  17.    18. int j= a.i;  19.    20. ) catch (Exception e) {}  21. )  22. }   Which statement al line 17 will ensure that j=10 at line 19?()  

A、 a.wait();

B、 t.wait();

C、 t.join();

D、 t.yield();

E、 t.notify();

F、 a.notify();

G、 t.interrupt();

  • C
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