title: java SimpleDateFormat CST different date but same result
body: <pre><code>public class TestDate {
      public static void main(String[] args) {
              Date data1 = new Date(25682400000L);
              Date data2 = new Date(25686000000L);
              SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd:HH-mm-ss");
              TimeZone cdtTime = TimeZone.getTimeZone("CST");
              sdf.setTimeZone(cdtTime);
              String s1 = sdf.format(data1);
              String s2 = sdf.format(data2);
              System.out.println(s1);
              System.out.println(s2);
      }
  }
  </code></pre>
  
  <p>After run the above code,the result:</p>
  
  <pre><code>1970-10-25:01-00-00
  1970-10-25:01-00-00
  </code></pre>
  
  <p>someone can tell my why?thanks</p>