title: How to assign a minimum value for parameters in a constructor (java)?
body: <p>For instance, I have a constructor:</p>
  
  <pre><code>public Employee(int age, String name){ }
  </code></pre>
  
  <p>Which command should I write in the constructor that it doesn't allow to create an employee object with the age parameter less than 21?</p>
  
  <p>I am not allowed to use exceptions.</p>
  
  <p>Thank you</p>