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多項選擇題

Which two CANNOT directly cause a thread to stop executing? ()  

A. Existing from a synchronized block.
B. Calling the wait method on an object.
C. Calling notify method on an object.
D. Calling read method on an InputStream object.
E. Calling the SetPriority method on a Thread object.

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單項選擇題

public class X implements Runnable (  
private int x;  
private int y;  
 public static void main(String args) (  
X that = new X();  
(new Thread(that)) . start( ); 
 (new Thread(that)) . start( );  
)  
 public synchronized void run( ) (  
 for (;;) (  
 x++;  
 y++;  
 System.out.printIn(“x = “ + x + “, y = “ + y);  
 ) 
 )  
 )  
What is the result?()

A. An error at line 11 causes compilation to fail.
B. Errors at lines 7 and 8 cause compilation to fail.
C. The program prints pairs of values for x and y that might not always be the same on the same line  (for example, “x=2, y=1”)
D. The program prints pairs of values for x and y that are always the same on the same line (forexample, “x=1, y=1”. In addition, each value appears twice (for example, “x=1, y=1” followed by  “x=1, y=1”)
E. The program prints pairs of values for x and y that are always the same on the same line (for example, “x=1, y=1”. In addition, each value appears twice (for example, “x=1, y=1” followed by  “x=2s, y=2”)

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