Achieving immutable object state
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  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/3162665/immutable-class">Immutable class?</a>  </p>
</blockquote>



<p>In Java, what is the simplest way to make an object immutable ? Is it true that we need to ascertain that the lowest level primitives it contains must be immutable and only then it is possible to make the object immutable ? </p>
