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多选题
Given the following code， which statements concerning the objects referenced through the member variables i， j and k are true， given that any thread may call the methods a， b and c at any time？ （） class Counter { int v = 0； synchronized void inc（） { v++； } synchronized void dec（） { v--； } } public class Q7ed5 { Counter i； Counter j； Counter k； public synchronized void a（） { i.inc（）； System.out.println（"a"）； i.dec（）； } public synchronized void b（） { i.inc（）； j.inc（）； k.inc（）； System.out.println（"b"）； i.dec（）； j.dec（）； k.dec（）； } public void c（） { k.inc（）； System.out.println（"c"）； k.dec（）； } }
A
i.v is guaranteed always to be 0 or 1.
B
j.v is guaranteed always to be 0 or 1.
C
k.v is guaranteed always to be 0 or 1
D
j.v will always be greater than or equal to k.v at any give time.
E
k.v will always be greater than or equal to j.v at any give time.
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更多 “多选题Given the following code， which statements concerning the objects referenced through the member variables i， j and k are true， given that any thread may call the methods a， b and c at any time？ （） class Counter { int v = 0； synchronized void inc（） { v++； } synchronized void dec（） { v--； } } public class Q7ed5 { Counter i； Counter j； Counter k； public synchronized void a（） { i.inc（）； System.out.println（"a"）； i.dec（）； } public synchronized void b（） { i.inc（）； j.inc（）； k.inc（）； System.out.println（"b"）； i.dec（）； j.dec（）； k.dec（）； } public void c（） { k.inc（）； System.out.println（"c"）； k.dec（）； } }Ai.v is guaranteed always to be 0 or 1.Bj.v is guaranteed always to be 0 or 1.Ck.v is guaranteed always to be 0 or 1Dj.v will always be greater than or equal to k.v at any give time.Ek.v will always be greater than or equal to j.v at any give time.” 相关考题
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