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23 
24 /*
25  * @test
26  * @bug     5025230
27  * @summary Tests to see that a set nested in initialValue works OK
28  * @author  Pete Soper
29  */
30 public class InitialValue implements Runnable {
31 
32     static ThreadLocal<String> other;
33     static boolean passed;
34 
35     public class MyLocal extends ThreadLocal<String> {
36         String val;
initialValue()37         protected String initialValue() {
38             other = new ThreadLocal<String>();
39             // This should reuse the map that the containing get() created
40             // or visa versa (i.e. instead of a second map being created).
41             other.set("Other");
42             return "Initial";
43         }
44     }
45 
run()46     public void run() {
47         MyLocal l = new MyLocal();
48         // This should pick up the initial value
49         String s1 = l.get();
50         // And this should pick up the other local in this thread's locals map
51         String s2 = other.get();
52         if ((s2 != null) && s2.equals("Other")) {
53             // JMM guarantees this will be visible to
54             // another thread joining with this thread's
55             // termination: no need for this to be volatile.
56             passed = true;
57         }
58     }
59 
main(String[] args)60     public static void main(String[] args) {
61         // Starting with Mustang the main thread already has an initialized
62         // ThreadLocal map at this point, so test with a second thread.
63         Thread t = new Thread(new InitialValue());
64         t.start();
65         try {
66             t.join();
67         } catch (InterruptedException e) {
68             throw new RuntimeException("Test Interrupted: failed");
69         }
70         if (!passed) {
71             throw new RuntimeException("Test Failed");
72         }
73     }
74 }
75