你可能感興趣的試題

What happens when thread X executes a wait（） method on object A， without owning object A’s lock？（）

A. Compilation fails.
B. An exception is thrown.
C. The wait（） method has no effect.
D. Thread X receives the lock immediately.
E. Object A moves the thread to the wait pool.

單項(xiàng)選擇題

public class SyncTest {
private int x；
private int y；
private synchronized void setX（ int i ） { x = i； }
private synchronized void setY（ int i ） { y = i； }
public void setXY（ int i ） { setX（i）； setY（i）； }
public synchronized boolean check（） { return x != y； }
}
Under which condition will check return true when called from a different class？（）

A. check can never return true.
B. check can return true when setXY is called by multiple threads.
C. check can return true when multiple threads call setX and setY separately.
D. check can return true only if SyncTest is changed to allow x and y to be set separately.

你可能感興趣的試題

What happens when thread X executes a wait（） method on object A， without owning object A’s lock？（）

What happens when thread X executes a wait（） method on object A， without owning object A’s lock？（）