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几道问题有待解决如能帮忙不胜感激

xujunfbi

发贴: 7
积分: 0

于 2004-08-05 11:39

QUESTION NO: 49
Given:
10. public Object m() {
11. Object o = new Float(3.14F);
12. Object [] oa = new Object[1];
13. oa[0] = o;
14. o = null;
15. oa[0] = null;
16. return 0;
17. }
When is the Float object, created in line 11, eligible for garbage collection?
A. Just after line 13.
B. Just after line 14.
C. Just after line 15.
D. Just after line 16 (that is, as the method returns).

--------------------------------------------------------------------------------

1. public class Test {
2. public static void main(String[] args) {
3. int x = 0;
4. assert (x > 0): “assertion failed”;
5. System.out.println(“finished”);
6. }
7. }
What is the result?
A. finished
B. Compilation fails.
C. An AssertionError is thrown.
D. An AssertionError is thrown and finished is output.

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Which two statements are true regarding the return values of property written
hashCode and equals methods from two instances of the same class? (Choose two)
A. If the hashCode values are different, the objects might be equal.
B. If the hashCode values are the same, the object must be equal.
C. If the hashCode values are the same, the objects might be equal.
D. If the hashCode values are different, the objects must be unequal.

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人气	标题	作者	字数	发贴时间
7568	几道问题有待解决如能帮忙不胜感激	xujunfbi	1340	2004-08-05 11:39
6351	Re:几道问题有待解决如能帮忙不胜感激	looluo	12	2004-08-05 17:00
6544	Re:几道问题有待解决如能帮忙不胜感激	kempguan	3	2004-08-06 15:34
6189	Re:几道问题有待解决如能帮忙不胜感激	czgdjzy	90	2004-08-06 17:21
6299	Re:几道问题有待解决如能帮忙不胜感激	bsspirit	105	2004-08-08 23:35
6628	Re:几道问题有待解决如能帮忙不胜感激	vk2001	529	2004-08-09 18:04
6964	Re:几道问题有待解决如能帮忙不胜感激	vk2001	156	2004-08-09 18:10

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