le="class or interface in java.io">IOException</a>,
                         <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassNotFoundException.html?is-external=true" title="class or interface in java.lang">ClassNotFoundException</a></pre>
<div class="block">The object implements the readExternal method to restore its
 contents by calling the methods of DataInput for primitive
 types and readObject for objects, strings and arrays.  The
 readExternal method must read the values in the same s