title: i dont understand what is 0x7fffffff mean. is there any other way to code getHashValue method?
body: <pre><code>public int getHashValue(K key){
      return (key.hashCode() &amp; 0x7fffffff) % size;
  }
  </code></pre>
  
  <p>i dont understand what is 0x7fffffff mean. is there any other way to code getHasValue method? </p>