title: What is serialVersionUID in java, normally in exception class?
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/285793/why-should-i-bother-about-serialversionuid">Why should I bother about serialVersionUID?</a>  </p>
  </blockquote>
  
  
  
  <p>I am going through some exception handling code and i saw something named as serialVersionUID. What this uid is for?? Is it only limited to exception or can be used in all classes??? what is the advantage of this id???</p>