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Thread safe problem

iany

发贴: 3
积分: 0

于 2004-07-23 05:14

Given
11 public class Acct extends HttpServlet {
12  public StringBuffer foo = new StringBuffer("foo");
13  public void doPost(HttpServletRequest req,
      HttpServletResponse resp){
14  ServletConfig config = getServletConfig();
15  String param1 = config.getInitParameter("param1");
16  ServletContext context = getServletContext();
17  Object obj = context.getAttribute("OBJ");
}
}
Which two variables reference objects that are thread-safe?(Choose two)
A obj at line 17
B foo at line 12
C config at line 14
D param1 at line 15
E context in line 16
Answer C D
Why E is incorrect?

话题树型展开

人气	标题	作者	字数	发贴时间
6774	Thread safe problem	iany	592	2004-07-23 05:14
5256	Re:Thread safe problem	yftsang2	231	2004-07-24 16:19
5327	Re:Thread safe problem	iany	170	2004-07-25 17:54
5921	Re:Thread safe problem	javaguan2	77	2004-08-20 13:01

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