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http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6352812
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import java.util.Date;
import java.util.TimeZone;
public class Test {
  @SuppressWarnings("unused")
  public static void main(String[] args) throws InterruptedException {
    DateThread thread = new DateThread();
    thread.start();
    TimeZone gmt = TimeZone.getTimeZone("GMT");
   
    Date now = new Date();
    System.out.println("main thread,before set timezone:" + now.toString());
    TimeZone.setDefault(gmt);
    Thread.currentThread().sleep(2000);
    thread.resume();
    System.out.println("main thread,after set timezone:" + now.toString());
   
  }
}
class DateThread extends Thread {
  @SuppressWarnings( { "unused", "deprecation" })
  public void run() {
    Date now = new Date();
    System.out.println("sub thread,before set timezone:" + now.toString());
    this.suspend();
    System.out.println("sub thread,after set timezone:" + now.toString());
  }
}
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