1. class TestA̳_睦霖题库

多项选择题 1. class TestA { 2. TestB b； 3. TestA（） { 4. b = new TestB（this）； 5. } 6. } 7. class TestB { 8. TestA a； 9. TestB（TestA a） { 10. this.a = a； 11. } 12. } 13. class TestAll { 14. public static void main （String args[]） { 15. new TestAll（）.makeThings（）； 16. // ...code continues on 17. } 18. void makeThings（） { 19. TestA test = new TestA（）； 20. } 21. } Which two statements are true after line 15， before main completes？（）: A、 Line 15 causes a stack overflow.; B、 An exception is thrown at runtime.; C、 The object referenced by a is eligible for garbage collection.; D、 The object referenced by b is eligible for garbage collection.; E、 The object referenced by a is not eligible for garbage collection.; F、 The object referenced by b is not eligible for garbage collection.

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