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单选题
1. class Bar { }  1. class Test {  2. Bar doBar() {  3. Bar b = new Bar();  4. return b;  5. }  6. public static void main (String args[]) {  7. Test t = new Test();  8. Bar newBar = t.doBar();  9. System.out.println(“newBar”);  10. newBar = new Bar();  11. System.out.println(“finishing”);  12. }  13. } At what point is the Bar object, created on line 3, eligible for garbage collection?()
A

 After line 8.

B

 After line 10.

C

 After line 4, when doBar() completes.

D

 After line 11, when main() completes.


参考答案

参考解析
解析: The correct answer is B. When a local object is returned, it is not yet available for garbage collection. For this reason, the object is only available for garbage collecting at line 10, where the only remaining reference to the object is replaced with an other object.
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