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单项选择题 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”)

  • E
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